atcomsystems.ca/forum Forums TDM Business Telephone Systems Mitel Telephones & Systems Networking a 3300 icp to an Avaya ACM via QSIG

Hi, I have successfully networked a 3300 with an avaya acm using Qsig trunks. I have set up the Mitel while another reseller set up the Avaya.

We have a problem where a call doesn't clear down. The call comes in on an ISDN trunk to the ACM and it routes to an extension on the mitel through the qsig trunks. When the mitel handset hangs up the call starts ringing the phone again. The call will only clear down once the external caller hangs up.

If I dial out from the mitel phone through the qsig trunks then out via the ISDN and then hang up the call clear downs fine. So it is only inbound calls.

Looking at the ccs trace the clear down messages are the same for inbound and outbound calls so it points towards the Avaya thats at fault.

Any ideas people?????

Thanks
Joe

Been several years since I read up on Q-sig, but I seem to recall that a call termination signal is sent from 1st end to hangup to other end. Seems like either the mitel doesn't send or avaya doesn't honor. "Looking at the ccs trace the clear down messages are the same for inbound and outbound calls so it points towards the Avaya thats at fault." appears to indicate that the problem is the Avaya. Are you certified on the Mitel? Is the other tech certified on the Avaya? If 1 or both of you are not, good luck. If both of you are, it's time to call your respective manufacturer support centers. That's what they are there for!

I'm certified on the Mitel and have already asked them the question. The answer was the Avaya was at fault but the avaya engineer is sure its the Mitel.

"avaya engineer is sure its the Mitel." Is this the technician on-site, or a REAL Avaya help line technician? If it's the former, tell him to call the latter. If it's the latter, ask him to tell you EXACTLY what signal he see's coming in when you hang up after an incoming call. And again after an outgoing call. If he doesn't know how to access the information, he needs to call his support. I can't find my Qsig info, is the signaling in-band or on a different data channel? If it's in-band, it would be soo easy to send a bogus disconnect signal and see what happens.

I'll do a little more testing tomorrow.

Thanks for the reply