-struct mISDNport *mISDNport_open(int port, char *portname, int ptp, int force_nt, int te_special, int l2hold, struct interface *interface);
+struct mISDNport *mISDNport_open(int port, char *portname, int ptp, int force_nt, int te_special, int l1hold, int l2hold, struct interface *interface);