voice-port 1 no non-linear ! voice-port 2 no non-linear ! voice-port 3 no non-linear ! voice-port 4 no non-linear ! dial-peer voice 1 pots destination-pattern 1 port 1 ! dial-peer voice 2 pots destination-pattern 2 port 2 ! dial-peer voice 3 pots destination-pattern 3 port 3 ! dial-peer voice 4 pots destination-pattern 4 port 4 ! dial-peer voice 10 voip destination-pattern .+T session protocol sipv2 session target sip-server codec g711ulaw bytes 80 no vad ! sip-ua retry invite 3 retry cancel 2 sip-server ipv4:192.168.1.1:5060 !