A client is trying to test voice over IP connectivity between 2 Avaya PBX's in 2 different branches.
IPSEC 3DES VPN is configured between the 2 branches, HO has an ASA5510 and branch has a PIX515 (version 6.2)
Full IP connectivity between the 2 sites is configured and tested.
The problem is that the AVAYA PBX in the HO (ASA) is able to call and talk to the other pbx in the branch(PIX), but when initiating the call from the branch,
the call setup is not working, and he gets directly a busy tone.
I tried to remove all the inspections on both firewall, but still had the same problem