sundance-communications.com/forum Forums Other TDM Phone Systems Vertical Telephones & Systems MBX and Answer Supervision

MPB-100 with loop start lines.

When placing a call out of the system, when the called party answers there is about a 5 second period where the called party cannot hear you. When the audio is finally cut-through then the call timer starts rolling.

If I test the lines with a buttset, it works fine.

I called Vertical and the tech support rep abruptly told me she "never heard of such a thing and it has to be the service provider". She also told me there are no settings or timers that control answer supervision response in the MBX (which I find hard to believe).

Their service provider says since it works fine with a buttset, it has to be the MBX.

Any ideas?

There isn't any answer supervision provided on loop start lines; only disconnect supervision. With that being said, this must be due to a setting in the system. As for what that setting is, I don't have a clue.

Yeah that's what I thought too. But was confused by Vertical's response that it has to be the service provider at fault.

There has to be some timer in the MBX, but damned if I can find it.

Its a serious problem, every call they place does this. Often the people they call hang up before the timer expires and they can hear the them.

Are they pressing a CO line to dial out or dialing 9?

under outgoing co attr set analog co voice connection to immediate connection

Don't know if this would help... however I installed a MBX and hooked a Vaolcom Remote Reply Pageing system to it and had the same problem, the fix is Program 174 CO Outgoing Inter Digit Timer. Set all the timers to their lowest level.