[VoiceOps] ATA To Connect to Mitel PBX

Nate Burke nate at blastcomm.com
Mon Jun 17 21:35:48 EDT 2019

Sorry for Dredging up an old post.  I've had the Adtran TA908 (2nd gen) 
installed to the MITEL for about a month, but now I'm starting to hear 
about problems.  In Certain call scenarios, the MITEL is not 
disconnecting the Trunk port, even though a call has ended.  The Mitel 
consultant is placing the blame squarely with me, that I'm not sending 
the proper 'Disconnect Supervision' and the MITEL is not hanging up the 

I've been googling, and reading manuals, and haven't been able to find 
any sort of settings for a 'disconnect supervision'

Anyone run into this before?


On 4/13/2019 7:23 AM, Nathan Anderson wrote:
> You didn't say what the "some issues" were that the customer was still complaining about.  Just stuck lines?  Just echo?  Both?  Something else entirely?
> Re: stuck lines, sounds to me like the TA and the phone system are not in agreement about what method of disconnect supervision (if any) the TA is going to provide and the phone system trunks are going to be looking for.
> -- Nathan
> -----Original Message-----
> From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Nate Burke
> Sent: Friday, April 12, 2019 9:33 AM
> To: voiceops at voiceops.org
> Subject: [VoiceOps] ATA To Connect to Mitel PBX
> I've only had to provide POTS termination to 1 MITEL system.  I tried
> using Linksys/Cisco SPA and Grandstream ATA's, then finally put in an
> Adtran TA904 (2nd gen).  The Adtran seemed to give the least number of
> issues with Lines getting stuck open, Echo, etc. But the (former)
> customer was still complaining about some issues when they closed up shop.
> I now need to provide 6 analog lines to hand off to an existing MITEL.
> Is there an ATA that's better than a TA908 for doing "Acceptable" POTS
> to a MITEL?
> Thanks,
> Nate

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