SV8100 call's keep dropping on random moments

[jeroentjed]

Hi all,

I have a issue that calls often drop. At first I thought this was a issue with the VoIP ata's or the internet connection. Now it seems to be a problem with the SV8100 because with a telephone directly connected to the ata the drops don't happen.
What can cause this? It happens on different moments, sometimes after 30+ minutes but yesterday I had a talk with a friend and it happened every time after a few minutes. (but not after the same amount of time)


Phoning Dutchman - NEC SV8100 - Your help is greatly appreciated

 

[CoralTech]

I suspect the ATA is spitting out something that the NEC is interpreting as call disconnect. Telephone in the ATA won't detect that.

 

[jeroentjed]

Why would a telephone in the ATA not detect that? And which settings in the SV8100 could I tweak so it doesn't think there is a call disconnect?

Phoning Dutchman - NEC SV8100 - Your help is greatly appreciated

 

[CoralTech]

Your first question begs the question why would you think it would? Fascinating.

Is it only one ATA and one trunk port causing the issue? Move it. Test.

 

[jeroentjed]

Tested it on 2 different ATA's, happens on both and on all trunk ports.

Phoning Dutchman - NEC SV8100 - Your help is greatly appreciated

 

[CoralTech]

14-02-12

 

[jeroentjed]

I ticked 14-02-12 off now, Ill let you know if it worked. Can I expect problems with disconnect when this setting is off?
thanks for your suggestion.

Phoning Dutchman - NEC SV8100 - Your help is greatly appreciated

 

[CoralTech]

Yep.

 

[jeroentjed]

Ok, first results are no more disconnects. But didn't have many long calls. One was more then a hour, worked fine.
As predicted by you I get problems with disconnecting, especially with a trunk to trunk transfer. If it weren't for the disconnect timer on trunk to trunk call's the line would stay active.
Is there anything I can do to make 14-02-12 work without having random disconnects?

Phoning Dutchman - NEC SV8100 - Your help is greatly appreciated

 

[jeroentjed]

No I was wrong. Can't make a trunk to trunk transfer without 14-02-12 on. Strange enough it was on. So I'm very curious how on earth I didn't had call's dropped and why the trunk to trunk transfers aren't disconnected properly. Must be another setting I changed?

Phoning Dutchman - NEC SV8100 - Your help is greatly appreciated

 

[jeroentjed]

Alright: Good news: no more call drops. Bad news: still problems with disconnecting. Weird thing: 14-02-12 is ticked on?! So should have no problems with disconnecting (but should have problems with call drops). Are there other settings where this is set?

Phoning Dutchman - NEC SV8100 - Your help is greatly appreciated