This link is relevant to your issue https://supportforums.adtran.com/thread/2264
> On Jun 17, 2019, at 9:36 PM, Nate Burke <[email protected]> wrote: > > 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 line. > > 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? > > Thanks, > Nate > > >> 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:[email protected]] On Behalf Of Nate Burke >> Sent: Friday, April 12, 2019 9:33 AM >> To: [email protected] >> 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 > > _______________________________________________ > VoiceOps mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/voiceops _______________________________________________ VoiceOps mailing list [email protected] https://puck.nether.net/mailman/listinfo/voiceops
