SIP: Fix incoming re-invite
[lcr.git] / mISDN.cpp
index 75a1b62..d67d0e8 100644 (file)
--- a/mISDN.cpp
+++ b/mISDN.cpp
@@ -63,7 +63,6 @@ static struct mi_ext_fn_s myfn;
 int mISDN_initialize(void)
 {
        char filename[256];
-       int ver;
 
        /* try to open raw socket to check kernel */
        mISDNsocket = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE);
@@ -76,7 +75,7 @@ int mISDN_initialize(void)
        // set debug printout function
        myfn.prt_debug = my_mISDNlib_debug;
 
-       ver = init_layer3(4, &myfn); // buffer of 4
+       init_layer3(4, &myfn); // buffer of 4
 
        /* open debug, if enabled and not only stack debugging */
        if (options.deb) {
@@ -117,12 +116,12 @@ void mISDN_deinitialize(void)
        upqueue_avail = 0;
 }
 
-int load_timer(struct lcr_timer *timer, void *instance, int index);
+static int load_timer(struct lcr_timer *timer, void *instance, int index);
 
 /*
  * constructor
  */
-PmISDN::PmISDN(int type, mISDNport *mISDNport, char *portname, struct port_settings *settings, int channel, int exclusive, int mode) : Port(type, portname, settings)
+PmISDN::PmISDN(int type, mISDNport *mISDNport, char *portname, struct port_settings *settings, struct interface *interface, int channel, int exclusive, int mode) : Port(type, portname, settings, interface)
 {
        p_m_mISDNport = mISDNport;
        p_m_portnum = mISDNport->portnum;
@@ -138,17 +137,18 @@ PmISDN::PmISDN(int type, mISDNport *mISDNport, char *portname, struct port_setti
        p_m_mute = 0;
        p_m_txdata = 0;
        p_m_delay = 0;
+       p_m_tx_dejitter = 0;
+       p_m_preload = ISDN_LOAD;
+       p_m_disable_dejitter = 0;
        p_m_echo = 0;
        p_m_tone = 0;
        p_m_rxoff = 0;
-       p_m_joindata = 0;
        p_m_inband_send_on = 0;
        p_m_inband_receive_on = 0;
        p_m_dtmf = !mISDNport->ifport->nodtmf;
+       p_m_dtmf_threshold = mISDNport->ifport->dtmf_threshold;
        memset(&p_m_timeout, 0, sizeof(p_m_timeout));
        add_timer(&p_m_timeout, mISDN_timeout, this, 0);
-       p_m_remote_ref = 0; /* channel shall be exported to given remote */
-       p_m_remote_id = 0; /* remote admin socket */
        SCPY(p_m_pipeline, mISDNport->ifport->interface->pipeline);
        
        /* audio */
@@ -348,15 +348,20 @@ void ph_control(struct mISDNport *mISDNport, class PmISDN *isdnport, int sock, u
        struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
        unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
        int ret;
+       int len = 8;
 
        if (sock < 0)
                return;
 
+       if (c1 == DTMF_TONE_START && c2 == 0) {
+               len = 4;
+       }
+
        ctrl->prim = PH_CONTROL_REQ;
        ctrl->id = 0;
        *d++ = c1;
        *d++ = c2;
-       ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
+       ret = sendto(sock, buffer, MISDN_HEADER_LEN+len, 0, NULL, 0);
        if (ret <= 0)
                PERROR("Failed to send to socket %d\n", sock);
        chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
@@ -400,6 +405,8 @@ static int _bchannel_create(struct mISDNport *mISDNport, int i)
        int ret;
        struct sockaddr_mISDN addr;
 
+       memset(&addr, 0, sizeof(addr));
+
        if (mISDNport->b_sock[i].inuse) {
                PERROR("Error: Socket already created for index %d\n", i);
                return(0);
@@ -488,6 +495,8 @@ static void _bchannel_configure(struct mISDNport *mISDNport, int i)
                ph_control(mISDNport, port, handle, (port->p_m_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", port->p_m_txdata);
        if (port->p_m_delay && mode == B_MODE_TRANSPARENT)
                ph_control(mISDNport, port, handle, DSP_DELAY, port->p_m_delay, "DSP-DELAY", port->p_m_delay);
+       if (port->p_m_tx_dejitter && mode == B_MODE_TRANSPARENT)
+               ph_control(mISDNport, port, handle, DSP_TX_DEJITTER, port->p_m_tx_dejitter, "DSP-TX_DEJITTER", port->p_m_tx_dejitter);
        if (port->p_m_tx_gain && mode == B_MODE_TRANSPARENT)
                ph_control(mISDNport, port, handle, DSP_VOL_CHANGE_TX, port->p_m_tx_gain, "DSP-TX_GAIN", port->p_m_tx_gain);
        if (port->p_m_rx_gain && mode == B_MODE_TRANSPARENT)
@@ -505,7 +514,7 @@ static void _bchannel_configure(struct mISDNport *mISDNport, int i)
 //     if (port->p_m_txmix && mode == B_MODE_TRANSPARENT)
 //             ph_control(mISDNport, port, handle, DSP_MIX_ON, 0, "DSP-MIX", 1);
        if (port->p_m_dtmf && mode == B_MODE_TRANSPARENT)
-               ph_control(mISDNport, port, handle, DTMF_TONE_START, 0, "DSP-DTMF", 1);
+               ph_control(mISDNport, port, handle, DTMF_TONE_START, port->p_m_dtmf_threshold, "DSP-DTMF", 1);
        if (port->p_m_crypt && mode == B_MODE_TRANSPARENT)
                ph_control_block(mISDNport, port, handle, DSP_BF_ENABLE_KEY, port->p_m_crypt_key, port->p_m_crypt_key_len, "DSP-CRYPT", port->p_m_crypt_key_len);
 }
@@ -566,22 +575,6 @@ It may be linked to a Port class, that likes to reactivate it.
 See above.
 After deactivating bchannel, and if not used, the bchannel becomes idle again.
 
-Also the bchannel may be exported, but only if the state is or becomes idle:
-
-- B_STATE_EXPORTING
-The bchannel assignment has been sent to the remove application.
-
-- B_STATE_REMOTE
-The bchannel assignment is acknowledged by the remote application.
-
-- B_STATE_IMPORTING
-The bchannel is re-imported by mISDN port object.
-
-- B_STATE_IDLE
-See above.
-After re-importing bchannel, and if not used, the bchannel becomes idle again.
-
-
 A bchannel can have the following events:
 
 - B_EVENT_USE
@@ -596,33 +589,8 @@ The bchannel is not required by Port class anymore
 - B_EVENT_DEACTIVATED
 The bchannel becomes inactive.
 
-- B_EVENT_EXPORTED
-The bchannel is now used by remote application.
-
-- B_EVENT_IMPORTED
-The bchannel is not used by remote application.
-
-- B_EVENT_EXPORTREQUEST
-The bchannel shall be exported to the remote application.
-
-- B_EVENT_IMPORTREQUEST
-The bchannel is released from the remote application.
-
 All actions taken on these events depend on the current bchannel's state and if it is linked to a Port class.
 
-if an export request is receive by remote application, p_m_remote_* is set.
-the b_remote_*[index] indicates if and where the channel is exported to. (set from the point on, where export is initiated, until imported is acknowledged.)
-- set on export request from remote application (if port is assigned)
-- set on channel use, if requested by remote application (p_m_remote_*)
-- cleared on drop request
-
-the bchannel will be exported with ref and stack given. remote application uses the ref to link bchannel to the call.
-the bchannel will be imported with stack given only. remote application must store stack id with the bchannel process.
-the bchannel import/export is acknowledged with stack given.
-
-if exporting, b_remote_*[index] is set to the remote socket id.
-if importing has been acknowledged. b_remote_*[index] is cleared.
-
 */
 
 /*
@@ -637,19 +605,15 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
        class PmISDN *b_port = mISDNport->b_port[i];
        int state = mISDNport->b_state[i];
        int timer = -1; // no change
-       unsigned int p_m_remote_ref = 0;
-       unsigned int p_m_remote_id = 0;
+#if 0
        int p_m_tx_gain = 0;
        int p_m_rx_gain = 0;
        char *p_m_pipeline = NULL;
        unsigned char *p_m_crypt_key = NULL;
        int p_m_crypt_key_len = 0;
        int p_m_crypt_key_type = 0;
-       unsigned int portid = (mISDNport->portnum<<8) + i+1+(i>=15);
 
        if (b_port) {
-               p_m_remote_id = b_port->p_m_remote_id;
-               p_m_remote_ref = b_port->p_m_remote_ref;
                p_m_tx_gain = b_port->p_m_tx_gain;
                p_m_rx_gain = b_port->p_m_rx_gain;
                p_m_pipeline = b_port->p_m_pipeline;
@@ -657,6 +621,7 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
                p_m_crypt_key_len = b_port->p_m_crypt_key_len;
                p_m_crypt_key_type = /*b_port->p_m_crypt_key_type*/1;
        }
+#endif
 
        switch(event) {
                case B_EVENT_USE:
@@ -665,140 +630,39 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
                        FATAL("bchannel must be linked to a Port class\n");
                switch(state) {
                        case B_STATE_IDLE:
-                       if (p_m_remote_ref) {
-                               /* export bchannel */
-                               message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
-                               chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
-                               add_trace("type", NULL, "assign");
-                               add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
-                               end_trace();
-                               state = B_STATE_EXPORTING;
-                               mISDNport->b_remote_id[i] = p_m_remote_id;
-                               mISDNport->b_remote_ref[i] = p_m_remote_ref;
-                       } else {
-                               /* create stack and send activation request */
-                               if (_bchannel_create(mISDNport, i)) {
-                                       _bchannel_activate(mISDNport, i, 1, 0);
-                                       state = B_STATE_ACTIVATING;
-                                       timer = B_TIMER_ACTIVATING;
-                               }
+                       /* create stack and send activation request */
+                       if (_bchannel_create(mISDNport, i)) {
+                               _bchannel_activate(mISDNport, i, 1, 0);
+                               state = B_STATE_ACTIVATING;
+                               timer = B_TIMER_ACTIVATING;
                        }
                        break;
 
                        case B_STATE_ACTIVATING:
-                       case B_STATE_EXPORTING:
                        /* do nothing, because it is already activating */
                        break;
 
-                       case B_STATE_DEACTIVATING:
-                       case B_STATE_IMPORTING:
-                       /* do nothing, because we must wait until we can reactivate */
-                       break;
-
                        default:
                        /* problems that might ocurr:
                         * B_EVENT_USE is received when channel already in use.
-                        * bchannel exported, but not freed by other port
                         */
                        PERROR("Illegal event %d at state %d, please correct.\n", event, state);
                }
                break;
 
-               case B_EVENT_EXPORTREQUEST:
-               /* special case where the bchannel is requested by remote */
-               if (!p_m_remote_ref) {
-                       PERROR("export request without remote channel set, please correct.\n");
-                       break;
-               }
-               switch(state) {
-                       case B_STATE_IDLE:
-                       /* in case, the bchannel is exported right after seize_bchannel */
-                       /* export bchannel */
-                       /* p_m_remote_id is set, when this event happens. */
-                       message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
-                       chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
-                       add_trace("type", NULL, "assign");
-                       add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
-                       end_trace();
-                       state = B_STATE_EXPORTING;
-                       mISDNport->b_remote_id[i] = p_m_remote_id;
-                       mISDNport->b_remote_ref[i] = p_m_remote_ref;
-                       break;
-
-                       case B_STATE_ACTIVATING:
-                       case B_STATE_EXPORTING:
-                       /* do nothing, because it is already activating */
-                       break;
-
-                       case B_STATE_DEACTIVATING:
-                       case B_STATE_IMPORTING:
-                       /* do nothing, because we must wait until we can reactivate */
-                       break;
-
-                       case B_STATE_ACTIVE:
-                       /* bchannel is active, so we deactivate */
-                       _bchannel_activate(mISDNport, i, 0, 0);
-                       state = B_STATE_DEACTIVATING;
-                       timer = B_TIMER_DEACTIVATING;
-                       break;
-
-                       default:
-                       /* problems that might ocurr:
-                        * ... when channel already in use.
-                        * bchannel exported, but not freed by other port
-                        */
-                       PERROR("Illegal event %d at state %d, please correct.\n", event, state);
-               }
-               break;
-
-               case B_EVENT_IMPORTREQUEST:
-               /* special case where the bchannel is released by remote */
-               if (p_m_remote_ref) {
-                       PERROR("import request with remote channel set, please correct.\n");
-                       break;
-               }
-               switch(state) {
-                       case B_STATE_IDLE:
-                       case B_STATE_ACTIVE:
-                       /* bchannel is not exported */
-                       break;
-
-                       case B_STATE_ACTIVATING:
-                       case B_STATE_EXPORTING:
-                       /* do nothing because we must wait until bchanenl is active before deactivating */
-                       break;
-
-                       case B_STATE_REMOTE:
-                       /* bchannel is exported, so we re-import */
-                       message_bchannel_to_remote(mISDNport->b_remote_id[i], 0, BCHANNEL_REMOVE, portid, 0,0,0,0,0,0, 0);
-                       chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
-                       add_trace("type", NULL, "remove");
-                       add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
-                       end_trace();
-                       state = B_STATE_IMPORTING;
-                       break;
-
-                       case B_STATE_DEACTIVATING:
-                       case B_STATE_IMPORTING:
-                       /* we may have taken an already deactivating bchannel, but do not require it anymore, so we do nothing */
-                       break;
-
-                       default:
-                       PERROR("Illegal event %d at state %d, please correct.\n", event, state);
-               }
-               break;
 
                case B_EVENT_ACTIVATED:
                timer = 0;
                switch(state) {
                        case B_STATE_ACTIVATING:
-                       if (b_port && !p_m_remote_id) {
+                       if (b_port) {
                                /* bchannel is active and used by Port class, so we configure bchannel */
                                _bchannel_configure(mISDNport, i);
                                state = B_STATE_ACTIVE;
                                b_port->p_m_load = 0;
+                               b_port->update_load();
                        } else {
-                               /* bchannel is active, but exported OR not used anymore (or has wrong stack config), so we deactivate */
+                               /* bchannel is active, but not used anymore (or has wrong stack config), so we deactivate */
                                _bchannel_activate(mISDNport, i, 0, 0);
                                state = B_STATE_DEACTIVATING;
                                timer = B_TIMER_DEACTIVATING;
@@ -810,31 +674,6 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
                }
                break;
 
-               case B_EVENT_EXPORTED:
-               switch(state) {
-                       case B_STATE_EXPORTING:
-                       if (b_port && p_m_remote_ref && p_m_remote_ref==mISDNport->b_remote_ref[i]) {
-                               /* remote export done */
-                               state = B_STATE_REMOTE;
-                       } else {
-                               /* bchannel is now exported, but we need bchannel back
-                                * OR bchannel is not used anymore
-                                * OR bchannel has been exported to an obsolete ref,
-                                * so reimport, to later export to new remote */
-                               message_bchannel_to_remote(mISDNport->b_remote_id[i], 0, BCHANNEL_REMOVE, portid, 0,0,0,0,0,0, 0);
-                               chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
-                               add_trace("type", NULL, "remove");
-                               add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
-                               end_trace();
-                               state = B_STATE_IMPORTING;
-                       }
-                       break;
-
-                       default:
-                       PERROR("Illegal event %d at state %d, please correct.\n", event, state);
-               }
-               break;
-
                case B_EVENT_DROP:
                if (!b_port)
                        FATAL("bchannel must be linked to a Port class\n");
@@ -844,7 +683,6 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
                        break;
 
                        case B_STATE_ACTIVATING:
-                       case B_STATE_EXPORTING:
                        /* do nothing because we must wait until bchanenl is active before deactivating */
                        break;
 
@@ -855,18 +693,7 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
                        timer = B_TIMER_DEACTIVATING;
                        break;
 
-                       case B_STATE_REMOTE:
-                       /* bchannel is exported, so we re-import */
-                       message_bchannel_to_remote(mISDNport->b_remote_id[i], 0, BCHANNEL_REMOVE, portid, 0,0,0,0,0,0, 0);
-                       chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
-                       add_trace("type", NULL, "remove");
-                       add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
-                       end_trace();
-                       state = B_STATE_IMPORTING;
-                       break;
-
                        case B_STATE_DEACTIVATING:
-                       case B_STATE_IMPORTING:
                        /* we may have taken an already deactivating bchannel, but do not require it anymore, so we do nothing */
                        break;
 
@@ -886,22 +713,11 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
                        _bchannel_destroy(mISDNport, i);
                        state = B_STATE_IDLE;
                        if (b_port) {
-                               /* bchannel is now deactivate, but is requied by Port class, so we reactivate / export */
-                               if (p_m_remote_ref) {
-                                       message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
-                                       chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
-                                       add_trace("type", NULL, "assign");
-                                       add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
-                                       end_trace();
-                                       state = B_STATE_EXPORTING;
-                                       mISDNport->b_remote_id[i] = p_m_remote_id;
-                                       mISDNport->b_remote_ref[i] = p_m_remote_ref;
-                               } else {
-                                       if (_bchannel_create(mISDNport, i)) {
-                                               _bchannel_activate(mISDNport, i, 1, 0);
-                                               state = B_STATE_ACTIVATING;
-                                               timer = B_TIMER_ACTIVATING;
-                                       }
+                               /* bchannel is now deactivate, but is requied by Port class, so we reactivate */
+                               if (_bchannel_create(mISDNport, i)) {
+                                       _bchannel_activate(mISDNport, i, 1, 0);
+                                       state = B_STATE_ACTIVATING;
+                                       timer = B_TIMER_ACTIVATING;
                                }
                        }
                        break;
@@ -911,39 +727,6 @@ void bchannel_event(struct mISDNport *mISDNport, int i, int event)
                }
                break;
 
-               case B_EVENT_IMPORTED:
-               switch(state) {
-                       case B_STATE_IMPORTING:
-                       state = B_STATE_IDLE;
-                       mISDNport->b_remote_id[i] = 0;
-                       mISDNport->b_remote_ref[i] = 0;
-                       if (b_port) {
-                               /* bchannel is now imported, but is requied by Port class, so we reactivate / export */
-                               if (p_m_remote_ref) {
-                                       message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
-                                       chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
-                                       add_trace("type", NULL, "assign");
-                                       add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
-                                       end_trace();
-                                       state = B_STATE_EXPORTING;
-                                       mISDNport->b_remote_id[i] = p_m_remote_id;
-                                       mISDNport->b_remote_ref[i] = p_m_remote_ref;
-                               } else {
-                                       if (_bchannel_create(mISDNport, i)) {
-                                               _bchannel_activate(mISDNport, i, 1, 0);
-                                               state = B_STATE_ACTIVATING;
-                                               timer = B_TIMER_ACTIVATING;
-                                       }
-                               }
-                       }
-                       break;
-
-                       default:
-                       /* ignore, because not assigned */
-                       ;
-               }
-               break;
-
                case B_EVENT_TIMEOUT:
                timer = 0;
                switch(state) {
@@ -1082,101 +865,6 @@ void PmISDN::drop_bchannel(void)
        p_m_b_exclusive = 0;
 }
 
-/* process bchannel export/import message from join */
-void message_bchannel_from_remote(class JoinRemote *joinremote, int type, unsigned int handle)
-{
-       class Endpoint *epoint;
-       class Port *port;
-       class PmISDN *isdnport;
-       struct mISDNport *mISDNport;
-       int i, ii;
-
-       switch(type) {
-               case BCHANNEL_REQUEST:
-               /* find the port object for the join object ref */
-               if (!(epoint = find_epoint_id(joinremote->j_epoint_id))) {
-                       PDEBUG(DEBUG_BCHANNEL, "join %d has no endpoint (anymore)\n", joinremote->j_serial);
-                       return;
-               }
-               if (!epoint->ep_portlist) {
-                       PDEBUG(DEBUG_BCHANNEL, "join %d has no port (anymore in portlist)\n", joinremote->j_serial);
-                       return;
-               }
-               if (epoint->ep_portlist->next) {
-                       PERROR("join %d has enpoint %d with more than one port. this shall not happen to remote joins.\n", joinremote->j_serial, epoint->ep_serial);
-               }
-               if (!(port = find_port_id(epoint->ep_portlist->port_id))) {
-                       PDEBUG(DEBUG_BCHANNEL, "join %d has no port (anymore as object)\n", joinremote->j_serial);
-                       return;
-               }
-               if ((port->p_type&PORT_CLASS_MASK) != PORT_CLASS_mISDN) {
-                       PERROR("join %d has port %d not of mISDN type. This shall not happen.\n", joinremote->j_serial, port->p_serial);
-               }
-               isdnport = (class PmISDN *)port;
-
-               /* assign */
-               if (isdnport->p_m_remote_id) {
-                       PERROR("join %d recevied bchannel request from remote, but channel is already assinged.\n", joinremote->j_serial);
-                       break;
-               }
-               mISDNport = isdnport->p_m_mISDNport;
-               i = isdnport->p_m_b_index;
-               chan_trace_header(mISDNport, isdnport, "MESSAGE_BCHANNEL (from remote application)", DIRECTION_NONE);
-               add_trace("type", NULL, "export request");
-               end_trace();
-               isdnport->p_m_remote_ref = joinremote->j_remote_ref;
-               isdnport->p_m_remote_id = joinremote->j_remote_id;
-               if (mISDNport && i>=0) {
-                       bchannel_event(mISDNport, i, B_EVENT_EXPORTREQUEST);
-               }
-               break;
-
-               case BCHANNEL_RELEASE:
-               case BCHANNEL_ASSIGN_ACK:
-               case BCHANNEL_REMOVE_ACK:
-               /* find mISDNport for stack ID */
-               mISDNport = mISDNport_first;
-               while(mISDNport) {
-                       i = 0;
-                       ii = mISDNport->b_num;
-                       while(i < ii) {
-                               if ((unsigned int)(mISDNport->portnum<<8)+i+1+(i>=15) == handle)
-                                       break;
-                               i++;
-                       }
-                       if (i != ii)
-                               break;
-                       mISDNport = mISDNport->next;
-               }
-               if (!mISDNport) {
-                       PERROR("received assign/remove ack for bchannel's handle=%x, but handle does not exist in any mISDNport structure.\n", handle);
-                       break;
-               }
-               
-               if (type!=BCHANNEL_RELEASE) {
-                       /* ack */
-                       chan_trace_header(mISDNport, mISDNport->b_port[i], "MESSAGE_BCHANNEL (from remote application)", DIRECTION_NONE);
-                       add_trace("type", NULL, (type==BCHANNEL_ASSIGN_ACK)?"assign_ack":"remove_ack");
-                       end_trace();
-                       bchannel_event(mISDNport, i, (type==BCHANNEL_ASSIGN_ACK)?B_EVENT_EXPORTED:B_EVENT_IMPORTED);
-               } else {
-                       /* release */
-                       isdnport = mISDNport->b_port[i];
-                       chan_trace_header(mISDNport, isdnport, "MESSAGE_BCHANNEL (from remote application)", DIRECTION_NONE);
-                       add_trace("type", NULL, "import request");
-                       end_trace();
-                       if (isdnport) {
-                               isdnport->p_m_remote_ref = 0;
-                               isdnport->p_m_remote_id = 0;
-                       }
-                       bchannel_event(mISDNport, i, B_EVENT_IMPORTREQUEST);
-               }
-               break;
-               default:
-               PERROR("received wrong bchannel message type %d from remote\n", type);
-       }
-}
-
 
 /*
  * handler
@@ -1203,31 +891,31 @@ times have no skew.
 
 * levels
 there are two levels:
-ISDN_LOAD will give the load that have to be kept in dsp.
-ISDN_MAXLOAD will give the maximum load before dropping.
+p_m_preload will give the load that have to be kept in dsp.
+ISDN_MAXLOAD (2*p_m_preload) will give the maximum load before dropping.
 
 * procedure for low priority data
 see txfromup() for procedure
 in short: remote data is ignored during high priority tones
 
 * procedure for high priority data
-whenever load is below ISDN_LOAD, load is filled up to ISDN_LOAD
+whenever load is below p_m_preload, load is filled up to p_m_preload
 if no more data is available, load becomes empty again.
 
 'load' variable:
-0                    ISDN_LOAD           ISDN_MAXLOAD
+0                    p_m_preload           ISDN_MAXLOAD
 +--------------------+----------------------+
 |                    |                      |
 +--------------------+----------------------+
 
-on empty load or on load below ISDN_LOAD, the load is inceased to ISDN_LOAD:
-0                    ISDN_LOAD           ISDN_MAXLOAD
+on empty load or on load below p_m_preload, the load is inceased to p_m_preload:
+0                    p_m_preload           ISDN_MAXLOAD
 +--------------------+----------------------+
 |TTTTTTTTTTTTTTTTTTTT|                      |
 +--------------------+----------------------+
 
-on empty load, remote-audio causes the load with the remote audio to be increased to ISDN_LOAD.
-0                    ISDN_LOAD           ISDN_MAXLOAD
+on empty load, remote-audio causes the load with the remote audio to be increased to p_m_preload.
+0                    p_m_preload           ISDN_MAXLOAD
 +--------------------+----------------------+
 |TTTTTTTTTTTTTTTTTTTTRRRRR                  |
 +--------------------+----------------------+
@@ -1235,10 +923,6 @@ on empty load, remote-audio causes the load with the remote audio to be increase
  */
 void PmISDN::update_load(void)
 {
-       /* don't trigger load event if: */
-       if (!p_tone_name[0] && !p_m_crypt_msg_loops && !p_m_inband_send_on)
-               return;
-
        /* don't trigger load event if event already active */
        if (p_m_loadtimer.active)
                return;
@@ -1246,7 +930,7 @@ void PmISDN::update_load(void)
        schedule_timer(&p_m_loadtimer, 0, 0); /* no delay the first time */
 }
 
-int load_timer(struct lcr_timer *timer, void *instance, int index)
+static int load_timer(struct lcr_timer *timer, void *instance, int index)
 {
        class PmISDN *isdnport = (class PmISDN *)instance;
 
@@ -1272,7 +956,10 @@ void PmISDN::load_tx(void)
        p_m_last_tv_msec = current_time.tv_usec/1000;
 
        /* process only if we have samples and we are active */
-       if (elapsed && p_m_mISDNport->b_state[p_m_b_index] == B_STATE_ACTIVE) {
+       if (p_m_mISDNport->b_state[p_m_b_index] != B_STATE_ACTIVE)
+               return;
+
+       if (elapsed) {
                /* update load */
                if (elapsed < p_m_load)
                        p_m_load -= elapsed;
@@ -1280,10 +967,10 @@ void PmISDN::load_tx(void)
                        p_m_load = 0;
 
                /* to send data, tone must be on */
-               if ((p_tone_name[0] || p_m_crypt_msg_loops || p_m_inband_send_on) /* what tones? */
-                && (p_m_load < ISDN_LOAD) /* not too much load? */
+               if ((p_tone_name[0] || p_dov_tx || p_m_crypt_msg_loops || p_m_inband_send_on) /* what tones? */
+                && (p_m_load < p_m_preload) /* not too much load? */
                 && (p_state==PORT_STATE_CONNECT || p_m_mISDNport->tones || p_m_inband_send_on)) { /* connected or inband-tones? */
-                       int tosend = ISDN_LOAD - p_m_load, length; 
+                       int tosend = p_m_preload - p_m_load, length; 
                        unsigned char buf[MISDN_HEADER_LEN+tosend];
                        struct mISDNhead *frm = (struct mISDNhead *)buf;
                        unsigned char *p = buf+MISDN_HEADER_LEN;
@@ -1320,26 +1007,29 @@ void PmISDN::load_tx(void)
                                tosend -= length;
                        }
 
+                       /* copy dov */
+                       if (p_dov_tx) {
+                               tosend -= dov_tx(p, tosend);
+                       }
+
                        /* copy tones */
                        if (p_tone_name[0] && tosend) {
                                tosend -= read_audio(p, tosend);
                        }
 
                        /* send data */
-                       if (ISDN_LOAD - p_m_load - tosend > 0) {
+                       if (p_m_preload - p_m_load - tosend > 0) {
                                frm->prim = PH_DATA_REQ;
                                frm->id = 0;
-                               ret = sendto(p_m_mISDNport->b_sock[p_m_b_index].fd, buf, MISDN_HEADER_LEN+ISDN_LOAD-p_m_load-tosend, 0, NULL, 0);
+                               ret = sendto(p_m_mISDNport->b_sock[p_m_b_index].fd, buf, MISDN_HEADER_LEN+p_m_preload-p_m_load-tosend, 0, NULL, 0);
                                if (ret <= 0)
-                                       PERROR("Failed to send to socket %d (samples = %d)\n", p_m_mISDNport->b_sock[p_m_b_index].fd, ISDN_LOAD-p_m_load-tosend);
-                               p_m_load += ISDN_LOAD - p_m_load - tosend;
+                                       PERROR("Failed to send to socket %d (samples = %d)\n", p_m_mISDNport->b_sock[p_m_b_index].fd, p_m_preload-p_m_load-tosend);
+                               p_m_load += p_m_preload - p_m_load - tosend;
                        }
                }
        }
 
-       if (p_tone_name[0] || p_m_crypt_msg_loops || p_m_inband_send_on || p_m_load) {
-               schedule_timer(&p_m_loadtimer, 0, ISDN_TRANSMIT*125);
-       }
+       schedule_timer(&p_m_loadtimer, 0, PORT_TRANSMIT * 125);
 }
 
 /* handle timeouts */
@@ -1364,8 +1054,6 @@ static int mISDN_timeout(struct lcr_timer *timer, void *instance, int i)
 void PmISDN::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len)
 {
        unsigned int cont = *((unsigned int *)data);
-       unsigned char *data_temp;
-       unsigned int length_temp;
        struct lcr_msg *message;
        unsigned char *p;
        int l;
@@ -1383,10 +1071,23 @@ void PmISDN::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len
                        end_trace();
                        if (!p_m_dtmf)
                                return;
-                       message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_DTMF);
-                       message->param.dtmf = cont & DTMF_TONE_MASK;
-                       PDEBUG(DEBUG_PORT, "PmISDN(%s) PH_CONTROL INDICATION  DTMF digit '%c'\n", p_name, message->param.dtmf);
-                       message_put(message);
+                       if (p_type == PORT_TYPE_POTS_FXS_IN && p_state == PORT_STATE_IN_OVERLAP) {
+                               class Pfxs *pfxs = (class Pfxs *)this;
+                               if (!pfxs->p_m_fxs_allow_dtmf) {
+                                       PDEBUG(DEBUG_PORT, "PmISDN(%s) DTMF for FXS currently disabled\n", p_name);
+                                       return;
+                               }
+                               SCCAT(p_dialinginfo.id, cont & DTMF_TONE_MASK);
+                               message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_INFORMATION);
+                               message->param.information.id[0] = cont & DTMF_TONE_MASK;
+                               PDEBUG(DEBUG_PORT, "PmISDN(%s) PH_CONTROL INDICATION  INFORMATION digit '%s'\n", p_name, message->param.information.id);
+                               message_put(message);
+                       } else {
+                               message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_DTMF);
+                               message->param.dtmf = cont & DTMF_TONE_MASK;
+                               PDEBUG(DEBUG_PORT, "PmISDN(%s) PH_CONTROL INDICATION  DTMF digit '%c'\n", p_name, message->param.dtmf);
+                               message_put(message);
+                       }
                        return;
                }
                switch(cont) {
@@ -1439,6 +1140,8 @@ void PmISDN::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len
 //             printf(".");fflush(stdout);return;
                if (p_record)
                        record(data, len, 1); // from up
+               if (p_tap)
+                       tap(data, len, 1); // from up
                return;
        }
        if (hh->prim != PH_DATA_IND && hh->prim != DL_DATA_IND) {
@@ -1446,10 +1149,17 @@ void PmISDN::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len
                return;
        }
 
+       /* dov is processed */
+       if (p_dov_rx)
+               dov_rx(data, len);
+
        /* inband is processed */
        if (p_m_inband_receive_on)
                inband_receive(data, len);
 
+       /* send to remote, if bridged */
+       bridge_tx(data, len);
+
        /* calls will not process any audio data unless
         * the call is connected OR tones feature is enabled.
         */
@@ -1476,6 +1186,8 @@ void PmISDN::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len
        /* record data */
        if (p_record)
                record(data, len, 0); // from down
+       if (p_tap)
+               tap(data, len, 0); // from down
 
        /* randomize and listen to crypt message if enabled */
        if (p_m_crypt_listen) {
@@ -1487,24 +1199,6 @@ void PmISDN::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len
 
                cryptman_listen_bch(data, len);
        }
-
-       p = data;
-
-       /* send data to epoint */
-       if (p_m_joindata && ACTIVE_EPOINT(p_epointlist)) { /* only if we have an epoint object */
-               length_temp = len;
-               data_temp = p;
-               while(length_temp) {
-                       message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_DATA);
-                       message->param.data.len = (length_temp>sizeof(message->param.data.data))?sizeof(message->param.data.data):length_temp;
-                       memcpy(message->param.data.data, data_temp, message->param.data.len);
-                       message_put(message);
-                       if (length_temp <= sizeof(message->param.data.data))
-                               break;
-                       data_temp += sizeof(message->param.data.data);
-                       length_temp -= sizeof(message->param.data.data);
-               }
-       }
 }
 
 
@@ -1532,9 +1226,9 @@ void PmISDN::set_tone(const char *dir, const char *tone)
 
        /* if no directory is given (by extension), we use interface.conf or options.conf */
        if (!dir || !dir[0]) {
-               if (p_m_mISDNport->ifport->tones_dir[0])
-                       dir = p_m_mISDNport->ifport->tones_dir;
-               else if (options.tones_dir[0])
+               if (p_tones_interface[0])
+                       dir = p_tones_interface;
+               else
                        dir = options.tones_dir;
        }
 
@@ -1672,15 +1366,6 @@ void PmISDN::message_mISDNsignal(unsigned int epoint_id, int message_id, union p
                set_conf(oldconf, newconf);
                break;
 
-               case mISDNSIGNAL_JOINDATA:
-               if (p_m_joindata != param->mISDNsignal.joindata) {
-                       p_m_joindata = param->mISDNsignal.joindata;
-                       PDEBUG(DEBUG_BCHANNEL, "we change to joindata=%d.\n", p_m_joindata);
-                       update_rxoff();
-               } else
-                       PDEBUG(DEBUG_BCHANNEL, "we already have joindata=%d.\n", p_m_joindata);
-               break;
-               
                case mISDNSIGNAL_DELAY:
                if (p_m_delay != param->mISDNsignal.delay) {
                        p_m_delay = param->mISDNsignal.delay;
@@ -1746,7 +1431,6 @@ void PmISDN::message_crypt(unsigned int epoint_id, int message_id, union paramet
                p_m_crypt_msg_current = 0; /* reset */
                p_m_crypt_msg_loops = 6; /* enable */
                update_rxoff();
-               update_load();
 #if 0
                /* disable txmix, or we get corrupt data due to audio process */
                if (p_m_txmix && p_m_b_index>=0 && p_m_mISDNport->b_mode[p_m_b_index] == B_MODE_TRANSPARENT) {
@@ -1762,37 +1446,72 @@ void PmISDN::message_crypt(unsigned int epoint_id, int message_id, union paramet
 
 }
 
+/* MESSAGE_VOOTP */
+void PmISDN::message_vootp(unsigned int epoint_id, int message_id, union parameter *param)
+{
+       struct lcr_msg *message;
+
+       message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_UPDATEBRIDGE);
+       message_put(message);
+
+#if 0
+does not make sense, since remote port may dejitter
+       if (param->vootp.enable) {
+               PDEBUG(DEBUG_ISDN, "PmISDN(%s) received vootp enable order, so we disable de-jitter.\n", p_name);
+               p_m_disable_dejitter = 1;
+       }
+#endif
+       update_rxoff();
+}
+
 /*
  * endpoint sends messages to the port
  */
 int PmISDN::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 {
-       if (Port::message_epoint(epoint_id, message_id, param))
-               return(1);
-
+       /* messages also handled by base class */
        switch(message_id) {
-               case MESSAGE_DATA: /* tx-data from upper layer */
-               txfromup(param->data.data, param->data.len);
-               return(1);
+               case MESSAGE_VOOTP: /* crypt control command */
+               PDEBUG(DEBUG_ISDN, "PmISDN(%s) received VoOTP encryption\n", p_name);
+               message_vootp(epoint_id, message_id, param);
+               break;
+       }
 
+       if (Port::message_epoint(epoint_id, message_id, param)) {
+               if (message_id == MESSAGE_BRIDGE)
+                       update_rxoff();
+               return 1;
+       }
+
+       /* messages not handled by base class */
+       switch(message_id) {
                case MESSAGE_mISDNSIGNAL: /* user command */
                PDEBUG(DEBUG_ISDN, "PmISDN(%s) received special ISDN SIGNAL %d.\n", p_name, param->mISDNsignal.message);
                message_mISDNsignal(epoint_id, message_id, param);
-               return(1);
+               return 1;
 
                case MESSAGE_CRYPT: /* crypt control command */
                PDEBUG(DEBUG_ISDN, "PmISDN(%s) received encryption command '%d'.\n", p_name, param->crypt.type);
                message_crypt(epoint_id, message_id, param);
-               return(1);
+               return 1;
+
+               case MESSAGE_DISABLE_DEJITTER:
+               PDEBUG(DEBUG_ISDN, "PmISDN(%s) received de-jitter disable order.\n", p_name);
+               p_m_disable_dejitter = 1;
+               p_m_preload = param->queue;
+               update_rxoff();
+               return 1;
        }
 
-       return(0);
+       return 0;
 }
 
 void PmISDN::update_rxoff(void)
 {
+       int tx_dejitter = 0;
+
        /* call bridges in user space OR crypto OR recording */
-       if (p_m_joindata || p_m_crypt_msg_loops || p_m_crypt_listen || p_record || p_m_inband_receive_on) {
+       if (p_bridge || p_m_crypt_msg_loops || p_m_crypt_listen || p_record || p_tap || p_m_inband_receive_on || p_dov_rx) {
                /* rx IS required */
                if (p_m_rxoff) {
                        /* turn on RX */
@@ -1813,8 +1532,8 @@ void PmISDN::update_rxoff(void)
                                        ph_control(p_m_mISDNport, this, p_m_mISDNport->b_sock[p_m_b_index].fd, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1);
                }
        }
-       /* recording */
-       if (p_record) {
+       /* recording / tapping */
+       if (p_record || p_tap) {
                /* txdata IS required */
                if (!p_m_txdata) {
                        /* turn on RX */
@@ -1835,6 +1554,16 @@ void PmISDN::update_rxoff(void)
                                        ph_control(p_m_mISDNport, this, p_m_mISDNport->b_sock[p_m_b_index].fd, DSP_TXDATA_OFF, 0, "DSP-TXDATA", 0);
                }
        }
+       /* dejitter on bridge */
+       if (p_bridge && !p_m_disable_dejitter)
+               tx_dejitter = 1;
+       if (p_m_tx_dejitter != tx_dejitter) {
+               p_m_tx_dejitter = tx_dejitter;
+               PDEBUG(DEBUG_BCHANNEL, "we change dejitter mode to %s.\n", (p_m_tx_dejitter) ? "on" : "off");
+               if (p_m_b_index > -1)
+                       if (p_m_mISDNport->b_state[p_m_b_index] == B_STATE_ACTIVE && p_m_mISDNport->b_mode[p_m_b_index] == B_MODE_TRANSPARENT)
+                               ph_control(p_m_mISDNport, this, p_m_mISDNport->b_sock[p_m_b_index].fd, DSP_TX_DEJITTER, p_m_tx_dejitter, "DSP-TX_DEJITTER", p_m_tx_dejitter);
+       }
 }
 
 static int mISDN_upqueue(struct lcr_fd *fd, unsigned int what, void *instance, int i)
@@ -1843,7 +1572,7 @@ static int mISDN_upqueue(struct lcr_fd *fd, unsigned int what, void *instance, i
        struct mbuffer *mb;
        struct l3_msg *l3m;
        char byte;
-       int ret;
+       int __attribute__((__unused__)) ret;
 
        /* unset global semaphore */
        upqueue_avail = 0;
@@ -1856,98 +1585,96 @@ static int mISDN_upqueue(struct lcr_fd *fd, unsigned int what, void *instance, i
        mISDNport = mISDNport_first;
        while(mISDNport) {
                /* handle queued up-messages (d-channel) */
-               if (!mISDNport->isloopback) {
-                       while ((mb = mdequeue(&mISDNport->upqueue))) {
-                               l3m = &mb->l3;
-                               switch(l3m->type) {
-                                       case MPH_ACTIVATE_IND:
-                                       if (mISDNport->l1link != 1) {
-                                               l1l2l3_trace_header(mISDNport, NULL, L1_ACTIVATE_IND, DIRECTION_IN);
-                                               end_trace();
-                                               mISDNport->l1link = 1;
-                                       }
+               while ((mb = mdequeue(&mISDNport->upqueue))) {
+                       l3m = &mb->l3;
+                       switch(l3m->type) {
+                               case MPH_ACTIVATE_IND:
+                               if (mISDNport->l1link != 1) {
+                                       l1l2l3_trace_header(mISDNport, NULL, L1_ACTIVATE_IND, DIRECTION_IN);
+                                       end_trace();
+                                       mISDNport->l1link = 1;
+                               }
+                               break;
+       
+                               case MPH_DEACTIVATE_IND:
+                               if (mISDNport->l1link != 0) {
+                                       l1l2l3_trace_header(mISDNport, NULL, L1_DEACTIVATE_IND, DIRECTION_IN);
+                                       end_trace();
+                                       mISDNport->l1link = 0;
+                               }
+                               break;
+
+                               case MPH_INFORMATION_IND:
+                               PDEBUG(DEBUG_ISDN, "Received MPH_INFORMATION_IND for port %d (%s).\n", mISDNport->portnum, mISDNport->ifport->interface->name);
+                               switch (l3m->pid) {
+                                       case L1_SIGNAL_LOS_ON:
+                                       mISDNport->los = 1;
                                        break;
-               
-                                       case MPH_DEACTIVATE_IND:
-                                       if (mISDNport->l1link != 0) {
-                                               l1l2l3_trace_header(mISDNport, NULL, L1_DEACTIVATE_IND, DIRECTION_IN);
-                                               end_trace();
-                                               mISDNport->l1link = 0;
-                                       }
+                                       case L1_SIGNAL_LOS_OFF:
+                                       mISDNport->los = 0;
+                                       break;
+                                       case L1_SIGNAL_AIS_ON:
+                                       mISDNport->ais = 1;
                                        break;
+                                       case L1_SIGNAL_AIS_OFF:
+                                       mISDNport->ais = 0;
+                                       break;
+                                       case L1_SIGNAL_RDI_ON:
+                                       mISDNport->rdi = 1;
+                                       break;
+                                       case L1_SIGNAL_RDI_OFF:
+                                       mISDNport->rdi = 0;
+                                       break;
+                                       case L1_SIGNAL_SLIP_TX:
+                                       mISDNport->slip_tx++;
+                                       break;
+                                       case L1_SIGNAL_SLIP_RX:
+                                       mISDNport->slip_rx++;
+                                       break;
+                               }
+                               break;
 
-                                       case MPH_INFORMATION_IND:
-                                       PDEBUG(DEBUG_ISDN, "Received MPH_INFORMATION_IND for port %d (%s).\n", mISDNport->portnum, mISDNport->ifport->interface->name);
-                                       switch (l3m->pid) {
-                                               case L1_SIGNAL_LOS_ON:
-                                               mISDNport->los = 1;
-                                               break;
-                                               case L1_SIGNAL_LOS_OFF:
-                                               mISDNport->los = 0;
-                                               break;
-                                               case L1_SIGNAL_AIS_ON:
-                                               mISDNport->ais = 1;
-                                               break;
-                                               case L1_SIGNAL_AIS_OFF:
-                                               mISDNport->ais = 0;
-                                               break;
-                                               case L1_SIGNAL_RDI_ON:
-                                               mISDNport->rdi = 1;
-                                               break;
-                                               case L1_SIGNAL_RDI_OFF:
-                                               mISDNport->rdi = 0;
-                                               break;
-                                               case L1_SIGNAL_SLIP_TX:
-                                               mISDNport->slip_tx++;
-                                               break;
-                                               case L1_SIGNAL_SLIP_RX:
-                                               mISDNport->slip_rx++;
-                                               break;
+                               case MT_L2ESTABLISH:
+                               l1l2l3_trace_header(mISDNport, NULL, L2_ESTABLISH_IND, DIRECTION_IN);
+                               add_trace("tei", NULL, "%d", l3m->pid);
+                               end_trace();
+                               mISDNport->l2link = 1;
+                               if (l3m->pid < 128)
+                                       mISDNport->l2mask[l3m->pid >> 3] |= (1 << (l3m->pid & 7));
+                               if ((!mISDNport->ntmode || mISDNport->ptp) && l3m->pid < 127) {
+                                       if (mISDNport->l2establish.active) {
+                                               unsched_timer(&mISDNport->l2establish);
+                                               PDEBUG(DEBUG_ISDN, "the link became active before l2establish timer expiry.\n");
                                        }
-                                       break;
+                               }
+                               break;
 
-                                       case MT_L2ESTABLISH:
-                                       l1l2l3_trace_header(mISDNport, NULL, L2_ESTABLISH_IND, DIRECTION_IN);
+                               case MT_L2RELEASE:
+                               if (l3m->pid < 128)
+                                       mISDNport->l2mask[l3m->pid >> 3] &= ~(1 << (l3m->pid & 7));
+                               if (!mISDNport->l2establish.active) {
+                                       l1l2l3_trace_header(mISDNport, NULL, L2_RELEASE_IND, DIRECTION_IN);
                                        add_trace("tei", NULL, "%d", l3m->pid);
                                        end_trace();
-                                       mISDNport->l2link = 1;
-                                       if (l3m->pid < 128)
-                                               mISDNport->l2mask[l3m->pid >> 3] |= (1 << (l3m->pid & 7));
-                                       if ((!mISDNport->ntmode || mISDNport->ptp) && l3m->pid < 127) {
-                                               if (mISDNport->l2establish.active) {
-                                                       unsched_timer(&mISDNport->l2establish);
-                                                       PDEBUG(DEBUG_ISDN, "the link became active before l2establish timer expiry.\n");
-                                               }
-                                       }
-                                       break;
-
-                                       case MT_L2RELEASE:
-                                       if (l3m->pid < 128)
-                                               mISDNport->l2mask[l3m->pid >> 3] &= ~(1 << (l3m->pid & 7));
-                                       if (!mISDNport->l2establish.active) {
-                                               l1l2l3_trace_header(mISDNport, NULL, L2_RELEASE_IND, DIRECTION_IN);
-                                               add_trace("tei", NULL, "%d", l3m->pid);
-                                               end_trace();
-                                               /* down if not nt-ptmp */ 
-                                               if (!mISDNport->ntmode || mISDNport->ptp)
-                                                       mISDNport->l2link = 0;
-                                       }
-                                       if (!mISDNport->isloopback && (!mISDNport->ntmode || mISDNport->ptp) && l3m->pid < 127) {
-                                               if (!mISDNport->l2establish.active && mISDNport->l2hold) {
-                                                       PDEBUG(DEBUG_ISDN, "set timer and establish.\n");
-                                                       schedule_timer(&mISDNport->l2establish, 5, 0);
-                                                       mISDNport->ml3->to_layer3(mISDNport->ml3, MT_L2ESTABLISH, 0, NULL);
-                                               }
+                                       /* down if not nt-ptmp */ 
+                                       if (!mISDNport->ntmode || mISDNport->ptp)
+                                               mISDNport->l2link = 0;
+                               }
+                               if ((!mISDNport->ntmode || mISDNport->ptp) && l3m->pid < 127) {
+                                       if (!mISDNport->l2establish.active && mISDNport->l2hold) {
+                                               PDEBUG(DEBUG_ISDN, "set timer and establish.\n");
+                                               schedule_timer(&mISDNport->l2establish, 5, 0);
+                                               mISDNport->ml3->to_layer3(mISDNport->ml3, MT_L2ESTABLISH, 0, NULL);
                                        }
-                                       break;
-
-                                       default:
-                                       /* l3-data is sent to LCR */
-                                       stack2manager(mISDNport, l3m->type, l3m->pid, l3m);
                                }
-                               /* free message */
-                               free_l3_msg(l3m);
+                               break;
+
+                               default:
+                               /* l3-data is sent to LCR */
+                               stack2manager(mISDNport, l3m->type, l3m->pid, l3m);
                        }
+                       /* free message */
+                       free_l3_msg(l3m);
                }
                mISDNport = mISDNport->next;
        }
@@ -1959,7 +1686,7 @@ static int l2establish_timeout(struct lcr_timer *timer, void *instance, int i)
 {
        struct mISDNport *mISDNport = (struct mISDNport *)instance;
 
-       if (!mISDNport->isloopback && mISDNport->l2hold && (mISDNport->ptp || !mISDNport->ntmode)) {
+       if (mISDNport->l2hold && (mISDNport->ptp || !mISDNport->ntmode)) {
                PDEBUG(DEBUG_ISDN, "the L2 establish timer expired, we try to establish the link portnum=%d.\n", mISDNport->portnum);
                mISDNport->ml3->to_layer3(mISDNport->ml3, MT_L2ESTABLISH, 0, NULL);
                schedule_timer(&mISDNport->l2establish, 5, 0); /* 5 seconds */
@@ -2029,7 +1756,6 @@ static int b_sock_callback(struct lcr_fd *fd, unsigned int what, void *instance,
 static int b_timer_timeout(struct lcr_timer *timer, void *instance, int i)
 {
        struct mISDNport *mISDNport = (struct mISDNport *)instance;
-puts("fires");
 
        bchannel_event(mISDNport, i, B_EVENT_TIMEOUT);
 
@@ -2082,7 +1808,7 @@ int do_layer3(struct mlayer3 *ml3, unsigned int cmd, unsigned int pid, struct l3
                // this is no problem.
                upqueue_avail = 1;
                char byte = 0;
-               int ret;
+               int __attribute__((__unused__)) ret;
                ret = write(upqueue_pipe[1], &byte, 1);
        }
        return 0;
@@ -2093,6 +1819,8 @@ int mISDN_getportbyname(int sock, int cnt, char *portname)
        struct mISDN_devinfo devinfo;
        int port = 0, ret;
 
+       memset(&devinfo, 0, sizeof(devinfo));
+
        /* resolve name */
        while (port < cnt) {
                devinfo.id = port;
@@ -2109,6 +1837,45 @@ int mISDN_getportbyname(int sock, int cnt, char *portname)
        return (port);
 }
 
+#ifdef ISDN_P_FXS_POTS
+/* handle frames from pots */
+static int pots_sock_callback(struct lcr_fd *fd, unsigned int what, void *instance, int i)
+{
+       struct mISDNport *mISDNport = (struct mISDNport *)instance;
+       unsigned char buffer[2048+MISDN_HEADER_LEN];
+       struct mISDNhead *hh = (struct mISDNhead *)buffer;
+       unsigned int cont;
+       int ret;
+
+       ret = recv(fd->fd, buffer, sizeof(buffer), 0);
+       if (ret < 0) {
+               PERROR("read error frame, errno %d\n", errno);
+               return 0;
+       }
+       if (ret < (int)MISDN_HEADER_LEN) {
+               PERROR("read short frame, got %d, expected %d\n", ret, (int)MISDN_HEADER_LEN);
+               return 0;
+       }
+       switch(hh->prim) {
+       case PH_CONTROL_IND:
+               cont = *((unsigned int *)(buffer + MISDN_HEADER_LEN));
+               /* l1-control is sent to LCR */
+               if (mISDNport->ntmode)
+                       stack2manager_fxs(mISDNport, cont);
+               else
+                       PERROR("FXO not supported!\n");
+               break;
+       case PH_ACTIVATE_REQ:
+               break;
+
+       default:
+               PERROR("child message not handled: prim(0x%x) socket(%d) msg->len(%d)\n", hh->prim, fd->fd, ret-MISDN_HEADER_LEN);
+       }
+
+       return 0;
+}
+#endif
+
 /*
  * global function to add a new card (port)
  */
@@ -2121,7 +1888,6 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
        int force_nt = ifport->nt;
        int l1hold = ifport->l1hold;
        int l2hold = ifport->l2hold;
-       int loop = 0;
        int ss5 = ifport->ss5;
        int i, cnt;
        int pri, bri, pots;
@@ -2130,24 +1896,7 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
        struct mISDN_devinfo devinfo;
        unsigned int protocol, prop;
 
-#if defined WITH_GSM_BS && defined WITH_GSM_MS
-       loop = ifport->gsm_ms | ifport->gsm_bs;
-#else
-#ifdef WITH_GSM_BS
-       loop = ifport->gsm_bs;
-#endif
-#ifdef WITH_GSM_MS
-       loop = ifport->gsm_ms;
-#endif
-#endif
-//printf("%s == %s\n", ifport->portname, options.loopback_int);
-       if (!strcmp(ifport->portname, options.loopback_lcr))
-               loop = 1;
-
-       if (loop) {
-               if (mISDNloop_open())
-                       return NULL;
-       }
+       memset(&devinfo, 0, sizeof(devinfo));
 
        /* check port counts */
        ret = ioctl(mISDNsocket, IMGETCOUNT, &cnt);
@@ -2163,10 +1912,7 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
        if (port < 0) {
                port = mISDN_getportbyname(mISDNsocket, cnt, ifport->portname);
                if (port < 0) {
-                       if (loop)
-                               PERROR_RUNTIME("Port name '%s' not found, did you load loopback interface?.\n", ifport->portname);
-                       else
-                               PERROR_RUNTIME("Port name '%s' not found, use 'misdn_info' tool to list all existing ports.\n", ifport->portname);
+                       PERROR_RUNTIME("Port name '%s' not found, use 'misdn_info' tool to list all existing ports.\n", ifport->portname);
                        return(NULL);
                }
                // note: 'port' has still the port number
@@ -2200,32 +1946,29 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
                pri = 1;
                nt = 1;
        }
-#ifdef ISDN_P_FXS
-       if (devinfo.Dprotocols & (1 << ISDN_P_FXS)) {
+#ifdef ISDN_P_FXS_POTS
+       if (devinfo.Dprotocols & (1 << ISDN_P_FXO_POTS)) {
                pots = 1;
                te = 1;
        }
-#endif
-#ifdef ISDN_P_FXO
-       if (devinfo.Dprotocols & (1 << ISDN_P_FXO)) {
+       if (devinfo.Dprotocols & (1 << ISDN_P_FXS_POTS)) {
                pots = 1;
                nt = 1;
        }
 #endif
        if (force_nt && !nt) {
-               PERROR_RUNTIME("Port %d does not support NT-mode\n", port);
+               if (!pots)
+                       PERROR_RUNTIME("Port %d does not support NT-mode\n", port);
+               else
+                       PERROR_RUNTIME("Port %d does not support FXS-mode\n", port);
                return(NULL);
        }
        if (bri && pri) {
                PERROR_RUNTIME("Port %d supports BRI and PRI?? What kind of controller is that?. (Can't use this!)\n", port);
                return(NULL);
        }
-       if (pots && !bri && !pri) {
-               PERROR_RUNTIME("Port %d supports POTS, LCR does not!\n", port);
-               return(NULL);
-       }
-       if (!bri && !pri) {
-               PERROR_RUNTIME("Port %d does not support BRI nor PRI!\n", port);
+       if (!bri && !pri && !pots) {
+               PERROR_RUNTIME("Port %d does not support BRI nor PRI nor POTS!\n", port);
                return(NULL);
        }
        if (!nt && !te) {
@@ -2238,6 +1981,10 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
        /* if TE an NT is supported (and not forced to NT), turn off NT */
        if (te && nt)
                nt = 0;
+       if (pots && te) {
+               PERROR_RUNTIME("Port %d uses FXO-mode, but not supported by LCR!\n", port);
+               return(NULL);
+       }
 
        /* check for double use of port */
        if (nt) {
@@ -2280,21 +2027,14 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
                mISDNportp = &((*mISDNportp)->next);
        mISDNport = (struct mISDNport *)MALLOC(sizeof(struct mISDNport));
        add_timer(&mISDNport->l2establish, l2establish_timeout, mISDNport, 0);
-       if (loop | ss5) {
-               /* loop/ss5 link is always active */
+       if (ss5) {
+               /* ss5 link is always active */
                mISDNport->l1link = 1;
                mISDNport->l2link = 1;
        } else {
                mISDNport->l1link = -1;
                mISDNport->l2link = -1;
        }
-#ifdef WITH_GSM_BS
-       mISDNport->gsm_bs = ifport->gsm_bs;
-#endif
-#ifdef WITH_GSM_MS
-       mISDNport->gsm_ms = ifport->gsm_ms;
-#endif
-       mISDNport->isloopback = loop;
        pmemuse++;
        *mISDNportp = mISDNport;
 
@@ -2325,55 +2065,59 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
        }
                
        /* allocate ressources of port */
-       protocol = (nt)?L3_PROTOCOL_DSS1_NET:L3_PROTOCOL_DSS1_USER;
-       prop = (1 << MISDN_FLG_L2_CLEAN);
-       if (ptp) // ptp forced
-              prop |= (1 << MISDN_FLG_PTP);
-       if (nt) // supports hold/retrieve on nt-mode
-              prop |= (1 << MISDN_FLG_NET_HOLD);
-       if (l1hold) // supports layer 1 hold
-              prop |= (1 << MISDN_FLG_L1_HOLD);
-       if (l2hold) // supports layer 2 hold
-              prop |= (1 << MISDN_FLG_L2_HOLD);
-       /* open layer 3 and init upqueue */
-       if (loop) {
-               unsigned long on = 1;
-               struct sockaddr_mISDN addr;
-
-               if (devinfo.nrbchan < 8) {
-                       printf("loop port %d has a low number of bchannels. (only %d) remember that all interfaces that requires a loopback could run out of channels\n", port, devinfo.nrbchan);
-//                     mISDNport_close(mISDNport);
-//                     return(NULL);
-               }
-
-               if ((mISDNport->lcr_sock = socket(PF_ISDN, SOCK_DGRAM, (bri) ? ISDN_P_TE_S0 : ISDN_P_TE_E1)) < 0) {
-                       PERROR_RUNTIME("loop port %d failed to open socket.\n", port);
+       if (!pots) {
+               /* ISDN */
+               protocol = (nt)?L3_PROTOCOL_DSS1_NET:L3_PROTOCOL_DSS1_USER;
+               prop = (1 << MISDN_FLG_L2_CLEAN);
+               if (ptp) // ptp forced
+                      prop |= (1 << MISDN_FLG_PTP);
+               if (nt) // supports hold/retrieve on nt-mode
+                      prop |= (1 << MISDN_FLG_NET_HOLD);
+               if (l1hold) // supports layer 1 hold
+                      prop |= (1 << MISDN_FLG_L1_HOLD);
+               if (l2hold) // supports layer 2 hold
+                      prop |= (1 << MISDN_FLG_L2_HOLD);
+               /* open layer 3 and init upqueue */
+               /* queue must be initializes, because l3-thread may send messages during open_layer3() */
+               mqueue_init(&mISDNport->upqueue);
+               mISDNport->ml3 = open_layer3(port, protocol, prop , do_layer3, mISDNport);
+               if (!mISDNport->ml3) {
+                       mqueue_purge(&mISDNport->upqueue);
+                       PERROR_RUNTIME("open_layer3() failed for port %d\n", port);
+                       start_trace(port,
+                               ifport->interface,
+                               NULL,
+                               NULL,
+                               DIRECTION_NONE,
+                               CATEGORY_CH,
+                               0,
+                               "PORT (open failed)");
+                       end_trace();
                        mISDNport_close(mISDNport);
                        return(NULL);
                }
-               /* set nonblocking io */
-               if (ioctl(mISDNport->lcr_sock, FIONBIO, &on) < 0) {
-                       PERROR_RUNTIME("loop port %d failed to set socket into nonblocking io.\n", port);
-                       mISDNport_close(mISDNport);
-                       return(NULL);
+       } else {
+#ifdef ISDN_P_FXS_POTS
+               /* POTS */
+               int sock, ret;
+               struct sockaddr_mISDN addr;
+               struct mISDNhead act;
+
+               /* open socket */
+               /* queue must be initializes, because even pots interfaces are checked at mISDN_upqueue loop */
+               mqueue_init(&mISDNport->upqueue);
+               sock = socket(PF_ISDN, SOCK_DGRAM, (nt) ? ISDN_P_FXS_POTS : ISDN_P_FXO_POTS);
+               if (sock < 0) {
+                       PERROR_RUNTIME("Cannot open mISDN due to '%s'.\n", strerror(errno));
+                       return NULL;
                }
                /* bind socket to dchannel */
-               memset(&addr, 0, sizeof(addr));
                addr.family = AF_ISDN;
                addr.dev = port;
                addr.channel = 0;
-               if (bind(mISDNport->lcr_sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
-                       PERROR_RUNTIME("loop port %d failed to bind socket. (errno %d)\n", port, errno);
-                       mISDNport_close(mISDNport);
-                       return(NULL);
-               }
-       } else {
-               /* queue must be initializes, because l3-thread may send messages during open_layer3() */
-               mqueue_init(&mISDNport->upqueue);
-               mISDNport->ml3 = open_layer3(port, protocol, prop , do_layer3, mISDNport);
-               if (!mISDNport->ml3) {
-                       mqueue_purge(&mISDNport->upqueue);
-                       PERROR_RUNTIME("open_layer3() failed for port %d\n", port);
+               ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
+               if (ret < 0) {
+                       PERROR_RUNTIME("Error: Failed to bind pots control channel\n");
                        start_trace(port,
                                ifport->interface,
                                NULL,
@@ -2383,15 +2127,23 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
                                0,
                                "PORT (open failed)");
                        end_trace();
-                       mISDNport_close(mISDNport);
                        return(NULL);
                }
+               act.prim = PH_ACTIVATE_REQ; 
+               act.id = 0;
+               ret = sendto(sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
+               if (ret <= 0)
+                       PERROR("Failed to send to socket %d\n", sock);
+               mISDNport->pots_sock.fd = sock;
+               register_fd(&mISDNport->pots_sock, LCR_FD_READ, pots_sock_callback, mISDNport, i);
+#endif
        }
 
        SCPY(mISDNport->name, devinfo.name);
        mISDNport->b_num = devinfo.nrbchan;
        mISDNport->portnum = port;
        mISDNport->ntmode = nt;
+       mISDNport->pots = pots;
        mISDNport->tespecial = ifport->tespecial;
        mISDNport->pri = pri;
        mISDNport->ptp = ptp;
@@ -2407,7 +2159,7 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
        }
 
        /* if ptp, pull up the link */
-       if (!mISDNport->isloopback && mISDNport->l2hold && (mISDNport->ptp || !mISDNport->ntmode)) {
+       if (!pots && mISDNport->l2hold && (mISDNport->ptp || !mISDNport->ntmode)) {
                mISDNport->ml3->to_layer3(mISDNport->ml3, MT_L2ESTABLISH, 0, NULL);
                l1l2l3_trace_header(mISDNport, NULL, L2_ESTABLISH_REQ, DIRECTION_OUT);
                add_trace("tei", NULL, "%d", 0);
@@ -2415,8 +2167,8 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
                schedule_timer(&mISDNport->l2establish, 5, 0); /* 5 seconds */
        }
 
-       /* for nt-mode ptmp the link is always up */
-       if (mISDNport->ntmode && !mISDNport->ptp)
+       /* for POTS or nt-mode ptmp the link is always up */
+       if (pots || (mISDNport->ntmode && !mISDNport->ptp))
                mISDNport->l2link = 1;
 
        PDEBUG(DEBUG_BCHANNEL, "using 'mISDN_dsp.o' module\n");
@@ -2429,7 +2181,10 @@ struct mISDNport *mISDNport_open(struct interface_port *ifport)
                    CATEGORY_CH,
                    0,
                    "PORT (open)");
-       add_trace("mode", NULL, (mISDNport->ntmode)?"network":"terminal");
+       if (!pots)
+               add_trace("mode", NULL, (mISDNport->ntmode)?"network":"terminal");
+       else
+               add_trace("mode", NULL, (mISDNport->ntmode)?"FXS":"FXO");
        add_trace("channels", NULL, "%d", mISDNport->b_num);
        if (mISDNport->ss5)
                add_trace("ccitt#5", NULL, "enabled");
@@ -2520,18 +2275,18 @@ void mISDNport_close(struct mISDNport *mISDNport)
        del_timer(&mISDNport->l2establish);
 
        /* close layer 3, if open */
-       if (!mISDNport->isloopback && mISDNport->ml3) {
+       if (mISDNport->ml3) {
                close_layer3(mISDNport->ml3);
        }
 
-       /* close gsm socket, if open */
-       if (mISDNport->isloopback && mISDNport->lcr_sock > -1) {
-               close(mISDNport->lcr_sock);
+       /* close layer 1, if open */
+       if (mISDNport->pots_sock.fd) {
+               unregister_fd(&mISDNport->pots_sock);
+               close(mISDNport->pots_sock.fd);
        }
 
        /* purge upqueue */
-       if (!mISDNport->isloopback)
-               mqueue_purge(&mISDNport->upqueue);
+       mqueue_purge(&mISDNport->upqueue);
 
        /* remove from list */
        mISDNportp = &mISDNport_first;
@@ -2554,45 +2309,52 @@ void mISDNport_close(struct mISDNport *mISDNport)
 
 
 /*
- * enque data from upper buffer
+ * enque data from remote port
  */
-void PmISDN::txfromup(unsigned char *data, int length)
+int PmISDN::bridge_rx(unsigned char *data, int length)
 {
-       unsigned char buf[MISDN_HEADER_LEN+((length>ISDN_LOAD)?length:ISDN_LOAD)];
+       unsigned char buf[MISDN_HEADER_LEN+((length>p_m_preload)?length:p_m_preload)];
        struct mISDNhead *hh = (struct mISDNhead *)buf;
        int ret;
 
+       if ((ret = Port::bridge_rx(data, length)))
+               return ret;
+
        if (p_m_b_index < 0)
-               return;
+               return -EIO;
        if (p_m_mISDNport->b_state[p_m_b_index] != B_STATE_ACTIVE)
-               return;
+               return -EINVAL;
 
        /* check if high priority tones exist
         * ignore data in this case
         */
-       if (p_tone_name[0] || p_m_crypt_msg_loops || p_m_inband_send_on)
-               return;
+       if (p_tone_name[0] || p_dov_tx || p_m_crypt_msg_loops || p_m_inband_send_on)
+               return -EBUSY;
 
        /* preload procedure
         * if transmit buffer in DSP module is empty,
         * preload it to DSP_LOAD to prevent jitter gaps.
+        * 
+        * if load runs empty, preload again.
         */
-       if (p_m_load == 0 && ISDN_LOAD > 0) {
+       if (p_m_disable_dejitter && p_m_load == 0 && p_m_preload > 0) {
+//printf("preload=%d\n", p_m_preload);
                hh->prim = PH_DATA_REQ; 
                hh->id = 0;
-               memset(buf+MISDN_HEADER_LEN, (options.law=='a')?0x2a:0xff, ISDN_LOAD);
-               ret = sendto(p_m_mISDNport->b_sock[p_m_b_index].fd, buf, MISDN_HEADER_LEN+ISDN_LOAD, 0, NULL, 0);
+               memset(buf+MISDN_HEADER_LEN, silence, p_m_preload);
+               ret = sendto(p_m_mISDNport->b_sock[p_m_b_index].fd, buf, MISDN_HEADER_LEN+p_m_preload, 0, NULL, 0);
                if (ret <= 0)
                        PERROR("Failed to send to socket %d\n", p_m_mISDNport->b_sock[p_m_b_index].fd);
-               p_m_load += ISDN_LOAD;
-               schedule_timer(&p_m_loadtimer, 0, ISDN_TRANSMIT*125);
+               p_m_load += p_m_preload;
+               schedule_timer(&p_m_loadtimer, 0, PORT_TRANSMIT * 125);
        }
 
        /* drop if load would exceed ISDN_MAXLOAD
         * this keeps the delay not too high
         */
-       if (p_m_load+length > ISDN_MAXLOAD)
-               return;
+//printf("load=%d len=%d 2*preload=%d\n", p_m_load, length, p_m_preload << 1);
+       if (p_m_disable_dejitter && p_m_preload > 0 && p_m_load+length > (p_m_preload << 1))
+               return -EINVAL;
 
        /* make and send frame */
        hh->prim = PH_DATA_REQ;
@@ -2602,6 +2364,8 @@ void PmISDN::txfromup(unsigned char *data, int length)
        if (ret <= 0)
                PERROR("Failed to send to socket %d\n", p_m_mISDNport->b_sock[p_m_b_index].fd);
        p_m_load += length;
+
+       return 0;
 }
 
 int PmISDN::inband_send(unsigned char *buffer, int len)
@@ -2614,8 +2378,6 @@ void PmISDN::inband_send_on(void)
 {
        PDEBUG(DEBUG_PORT, "turning inband signalling send on.\n");
        p_m_inband_send_on = 1;
-       /* trigger inband transmit */
-       update_load();
 }
 
 void PmISDN::inband_send_off(void)