For reasons exactly like this, we will only deploy an Adtran (TA-90x is what I use) in front of a Mitel system, for either POTS or PRI Handoff. Everything else has just been nothing but problems inter-oping to the MITEL. Normally we just walk away from a MITEL System anymore. The support headaches are not worth the revenue. Try throwing an Adtran in front of the MITEL and see if the problems go away. On 3/14/2022 3:50 PM, Mike Hammett wrote:
A customer of mine has a Mitel 3300 PBX. We deliver to them analog lines.
Everything worked fine for months, if not years. Then one day they say they can't receive inbound calls. They can still place outbound calls.
They're on a Grandstream HT818 ATA. I move some lines to the Zhone ONT that's on-site. No improvement.
I plug in a normal analog handset from Walmart or Menards. They all ring and answer just fine.
I plugged in a patch cable from their Mitel ONS2 to the analog trunk 5 and they set up an extension on that ONS2 so that a call to it would trigger an inbound call on their analog line. Apparently that worked.
The Mitel support agent is saying that we're not sending them between 24v - 48v.
All cables are 6' at most.
A) I don't see anywhere to configure voltage on either platform. B) I don't know how it could work and then just stop, other than equipment failure. C) I don't know how it would work just fine on a COTS phone, but not their Mitel. D) I don't know how the same problem could also afflict another ATA (build into the ONT).
Any tips?
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com
Midwest Internet Exchange http://www.midwest-ix.com
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops