Hi guyz I have 2 Cisco Routers - RV042(Site A) and RV082(Site B). And it is configure as gateway to gateway in configuration…working with files and computer servers both can access with each other and it has no problem…
Site A (im using grandstream GXW4024) - my freepbx distro server is in this site…
Site B (im using grandstream HT503) - I have one extension line here so I can call to one of the extension in Site A.
Note: Both grandstream are provision in freepbx server.
My problem is when one of the extension of Site A will call to the extension in Site B…the Site A cannot hear anything but Site B can hear the voice of Site A.
Please help me with this one guyz…where did I go wrong? Is their a port that I need to portforward for the routers?
It seems like the RTP isn’t flowing properly. Are you doing NAT or just routing? Any firewalls probably blocking those ports? You want to focus on the packet from Site B to Site A for any of the above cases…
Sounds indeed like a RTP issue but we’ve had the same problem with the Cisco RV82 series and after weeks of testing we found the problem in the MTU value (you have a different packet size when using a VPN).
Hi Stewart1, yes it has a different subnet since I am using VPN… My question is where can I include my local network settting / asterisk sip settings of Freepbx?
Yes in SIP settings localnet. It is very important because networks referenced in this list are EXCLUDED from NAT processing. Since a VPN Layer 2 you don’t need NAT, it’s a routed/connected network.