I have 2 analog phones connected to a 2600XM router, i have added the router as a h.323 gateway in call manager and i can call the analog phones from a ip phone, however the is no sound from the speaker on the ip phone. (the ip phone works when i call another ip phone, the analog phones can call each other and work fine.)
Is this a lab or production? What other equipment is being used (i.e. how are the phones connected to the 2600XM? A seperate switch, and etherswitch module, etc.) Does the router have an interface on the same subnet as the phones and is it a VLAN interface or a physical interface? Is there any NATing happening on the network?