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Joined: Mar 2002
Posts: 3,630
Moderator-Avaya, Nortel
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Moderator-Avaya, Nortel
Joined: Mar 2002
Posts: 3,630 |
We just installed a new MBX with SIP trunking. Everything is finally up and running after a bit of head-banging and troubleshooting. Now the only issue that seems to be remaining is that the SIP trunk doesn't seem to disconnect. If you make a test call into the system and then just hang up, the trunk stays online and even rolls into voice mail and records dead air for a while. Not sure if this issue is us, or the SIP provider??
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Joined: Aug 2004
Posts: 9,169 Likes: 18
Admin
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Admin
Joined: Aug 2004
Posts: 9,169 Likes: 18 |
Who is the carrier? A Certified SIP provider by Vertical?
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Joined: Jan 2005
Posts: 15,383 Likes: 13
Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,383 Likes: 13 |
Call me crazy here, but isn't SIP supposed to be a uniform signaling standard, like those with ISDN-PRI, loop-start, ground-start, etc?
You know, those pesky little rules that have been around for decades.
Should there be any difference between service providers if they are providing a uniform service? Does the FCC oversee SIP trunking standards? My own questions are starting to scare me.
Never mind. VoIP apparently has its own set of standards. I'll be glad when those of us on the front lines are afforded knowledge of the new set of standards. This is getting downright silly.
Ed Vaughn, MBSWWYPBX
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Joined: Mar 2002
Posts: 3,630
Moderator-Avaya, Nortel
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Moderator-Avaya, Nortel
Joined: Mar 2002
Posts: 3,630 |
Its not a registered carrier with Vertical, but I agree with Ed. Aren't the standards supposed to be uniform?
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Joined: Feb 2009
Posts: 3,136
Moderator-Vodavi, Vertical, XBlue
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Moderator-Vodavi, Vertical, XBlue
Joined: Feb 2009
Posts: 3,136 |
It would be my guess that since Vertical has a list of tested carriers, variables do exist. And remember, we still fight with carriers who don't automatically provide loop disconnect. Regional carriers and even Comcast drive me up a wall at times on that one.
- Dave S. -
You can never appease your ideologue opponents.
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Joined: Aug 2003
Posts: 5,154 Likes: 2
Moderator-Vertical, Vodavi
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Moderator-Vertical, Vodavi
Joined: Aug 2003
Posts: 5,154 Likes: 2 |
Every SIP provider is a little different. Sounds like you have a programming issue. Who is the provider? PM it to me if you don't want to name them.
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Joined: Aug 2004
Posts: 1,705 Likes: 36
Admin
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Admin
Joined: Aug 2004
Posts: 1,705 Likes: 36 |
I've seen routers cause issues like this (turn off any SIP ALG), or lack of port forwarding (5060 UDP + RTP ports pointed to PBX IP).
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Joined: Aug 2004
Posts: 9,169 Likes: 18
Admin
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Admin
Joined: Aug 2004
Posts: 9,169 Likes: 18 |
Alot of providers do authentication in different ways hence the problems. You might be able to make it work with trial and error but Vertical will not waste time trying to reverse engineer every provider in the field...that's why they have an approved list.
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Joined: Mar 2002
Posts: 3,630
Moderator-Avaya, Nortel
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Moderator-Avaya, Nortel
Joined: Mar 2002
Posts: 3,630 |
Should the carrier be providing some type of disconnect? That would make the most sense, but what types of disconnect are standard? I am trying to get ahold of the engineer for the carrier tomorrow. I have been trying to do this while I have been out of town.
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Joined: Dec 2005
Posts: 7,056
RIP Moderator-Mitel, Panasonic
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RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
Standard for Loop start is a 1/2 second loop open from the C.O. when the distant party hangs up the phone, releases their line/trunk, whatever you want to call it. Ground start, the C.O. lifts the ground as a signal (And permanent release) that the distant party hung up.
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
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