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
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
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 <voiceops at ics-il.net> 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 VoiceOps at voiceops.org <mailto:VoiceOps at voiceops.org> https://puck.nether.net/mailman/listinfo/voiceops <https://puck.nether.net/mailman/listinfo/voiceops>
Obihai has the same option, if this helps. On Mon, Mar 14, 2022 at 16:38 Matthew Beckwell <mbeckwell at gmail.com> wrote:
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 <voiceops at ics-il.net> 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
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
-- -- Hunter Fuller (they) Router Jockey VBH M-1A +1 256 824 5331 Office of Information Technology The University of Alabama in Huntsville Network Engineering
I work for a Mitel partner and have worked with 3300's since 2004. Assuming this is the embedded analog board on the controller, the ring detect threshold per the Mitel hardware documentation is 20-30Vrms, depending on the frequency of the ringing signal coming in. That being said, it's entirely possible the port on the board has gone bad, I've seen it myself. Is there an unused port on the board you can connect to? On Mon, Mar 14, 2022 at 3:58 PM Mike Hammett <voiceops at ics-il.net> 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
We have tried on five of their ports. No dice so far. They did do a loopback from one of the ONS ports to an analog trunk port and that apparently worked. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com From: "Brian Heinz" <brian.e.heinz at gmail.com> To: "Mike Hammett" <voiceops at ics-il.net> Cc: "voiceops" <voiceops at voiceops.org> Sent: Monday, March 14, 2022 6:11:15 PM Subject: Re: [VoiceOps] Mitel 3300 Issues I work for a Mitel partner and have worked with 3300's since 2004. Assuming this is the embedded analog board on the controller, the ring detect threshold per the Mitel hardware documentation is 20-30Vrms, depending on the frequency of the ringing signal coming in. That being said, it's entirely possible the port on the board has gone bad, I've seen it myself. Is there an unused port on the board you can connect to? On Mon, Mar 14, 2022 at 3:58 PM Mike Hammett < [ mailto:voiceops at ics-il.net | voiceops at ics-il.net ] > 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 [ mailto:VoiceOps at voiceops.org | VoiceOps at voiceops.org ] [ https://puck.nether.net/mailman/listinfo/voiceops | https://puck.nether.net/mailman/listinfo/voiceops ]
On 3/14/22 13:50, 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.
Mitel and some other PBXs have the ring voltage detector between the ring lead and ground as opposed to across tip and ring. This is true if optioned for loop or ground start. If your ATA or Zhone doesn't have a ground reference then the ability of the PBX to detect ringing voltage will be problematic. Sometimes it works, sometimes not. Sometimes reversing tip and ring will fix it. If the Zhone or Grandstream have a ground terminal on the chassis, try connecting it to the same ground as the PBX uses. The analog lines of Adtran TA9XX will work fine. Adtran nailed POTS emulation perfectly in these boxes. Tie the chassis ground screw on the Adtran to the same ground as used by the PBX. Better, put the TA9XX in and feed the PBX via PRI. Essentially zero post-dial delay. In addition, CNAM, CLID, etc. will now just work. -- Jay Hennigan - jay at west.net Network Engineering - CCIE #7880 503 897-8550 - WB6RDV
participants (6)
-
brian.e.heinz＠gmail.com -
hf0002+nanog＠uah.edu -
jay＠west.net -
mbeckwell＠gmail.com -
nate＠blastcomm.com -
voiceops＠ics-il.net