Our enterprise customer was using our AR1220 as a route, and enable the PBX service and Nat feature of AR at the same time. Customer hope the sip terminal (TE desktop and TE mobile) could register to AR1220 and could communicate each other.
A can’t make a voice call to C (SIP signaling doesn’t work properly) but C can make voice call to A and the connection build normally, but C could’t hear A’s voice, A could hear C’s voice.
disable AR's sip alg, just enable the SBC feature in AR as following.
voip-address media interface GigabitEthernet 0/0/0 192.168.10.82
voip-address signalling interface GigabitEthernet 0/0/0 192.168.10.82
voip-address media interface LoopBack 1 192.168.10.83
voip-address signalling interface LoopBack 1 192.168.10.83
pbx number-parameter 64 0
sbc media-relay interface GigabitEthernet 0/0/1 external
signalling-address ip 192.168.10.82 port 5060
sbc signalling-proxy enable
sbc media-proxy enable
sbc mapped-signalling-address ip 126.96.36.199 port 5060
sbc mapped-media-ip 188.8.131.52
codec-priority 0 9 20