I have a cisco 857 router, and i have 2 Cisco SPA 962 sitting behind it. The router is using has a static ip and NATing over to a private ip. I am having the issue with that the SIP signalling is getting through the router NAT, but the RTP isn't working.
I have tried a couple of ways, one way by configuring CBAC, but i get the issue of no RTP at all.
But if i manually configure ACLs, SIP singalling works, RTP works for outbound calls, but when i make an inbound call i only get one-way audio. The outside phone can hear the audio, but the phone inside can't hear anything.
I have attached my show run (minus passwords, etc)
When i usually have this kind of issue, i disable SIP ALG. Can you disable SIP ALG? Is so, how?