Problem getting external calls to complete

[soxcamp12]

I've just setup a VCX for one of my customers, they are reporting that intermitantly when they make an external call they hear a tone and the the call disconnects, they report after 5 or 6 tries the call will connect. Other sites are not seeing this issue the only difference is all other sites are large enough to use a 7122 gateway, this site is using a 4 port 7111 fxo, gateway software version is 5.2, VCX version is 7.1.21c, problem is seen with all phones at the stie which are 3102b and 3103b.



Help the users are getting grumpy

[alanapr]

by default the gateways have disconnect on busy enabled, when the gateway hears a busy tone or fast busy it will drop the call immediately that's why your users are hearing only half a tone, you get no busy message on the screen of the phone as the analog gateways send a 200 ok immediately after the number is dialed indicating that the call was connected.



We've found with our sites with the help of 3Com support if you enable call answer supervision, early media, disocnnect on busy tone, and IP media detectors this resolves the issues, if you fail to turn on IP media detectors your calls will disconnect after 180 seconds as the answer supervision fails to detect that a voice/modem/fax call has started, the users can still hear the busy tone and can terminate the call, the gateway can also dector the busy tone and still terminate the call so that the lines don't get stuck open if a caller hangs up in huntgroups, Auto Attendants, on hold, during camp on and park, so it's a win win. The reason why users now hear the busy tone is because the gateway doesn't act on the busy tone for outbound calling as the 200 ok has not been sent as yet by the gateway.



If you add the below to the bottom on your ini file and reload it to the gateway the problem should be resolved.



ENABLEVOICEDETECTION = 1

ENABLEEARLYMEDIA = 1

EnableDSPIPMDetectors = 1

DisconnectOnBusyTone=1



If you edit these via the gateways adminpage, make sure you burn them to the gateway and reboot and IP media detectors requires a reboot to activate.