The HT8XX series ATA FXS Ports should have an option for “Enable High Ring Power” you could try enabling.
~Matthew > On Mar 14, 2022, at 3:50 PM, Mike Hammett <[email protected]> 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 <http://www.ics-il.com/> > > > > Midwest Internet Exchange > http://www.midwest-ix.com <http://www.midwest-ix.com/> > > > > _______________________________________________ > VoiceOps mailing list > [email protected] <mailto:[email protected]> > https://puck.nether.net/mailman/listinfo/voiceops > <https://puck.nether.net/mailman/listinfo/voiceops>
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