Hi..
I have a problem with voip..
I have an elastix server at main office..main office firewall is:
Model Name : VigorPro 5510
Firmware Version : 3.3.5

and some branch offices with:
Model Name : Vigor2110Vn
Firmware Version : 3.6.3

all branch offices have vpn lan to lan..

I'm configurated voip>sip account on Vigor 2110 to elastix at main office..
Registraton is OK.. But when i call from this account (or call from main office to this account) to main office my voice not going from 2110 to there 5510 but i hear them (from 5510 to 2110 voice normally)..

I dont know what is this problem..can anyone help me?