-#port 1
-#channel force,11,12,13,14,15,17,18,19,20,21,any
+#portnum 0
+#layer2hold
+#channel-in 1,2,3,4,5,6,7,8,9,10,22,23,24,25,26,27,28,29,30,31
+#channel-out force,11,12,13,14,15,17,18,19,20,21,any
+
+# Example of an ISDN interface that runs in NT-mode, but provides tones during
+# setup. Also we provide tones during setup also.
+# This is usefull to interconnect to another PBX.
+# Additinally the timeout values for the different call states are adjusted to 60 seconds.
+# They are: setup, dialing, proceeding, alerting, disconnect
+#[PBX]
+#portnum 4
+#nt
+#layer2hold yes
+#earlyb yes
+#tones yes
+#timeouts 60 60 60 60 60
+
+# Alternatively give port name. You will find the name with 'isdninfo' tool.
+#[Int2]
+#portname hfc-s_usb.1
+#nt