I have VoIP connection beween two our tow branches (City A & City B). Every was OK except for few weeks I cannot call from City A to B.
City B can call and receive calls.
But City A can recieve calls from City B and cannot make calls
I searched everywhere but with no luck. Please help me diagnose this issue. The system we are using is SimplePBX (i don't know who got this :(
Thanks in advance,