[VoiceOps] Mitel 3300 Issues

[Nate Burke]

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
>
>
>
>
>
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