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XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217270 01/27/10 04:03 PM
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gregv Offline OP
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I've been experiencing an intermittent ongoing problem with a site that incoming callers receive busy signals for no apparent reason. Happens about once a month. It happens on any DID number dialed into the system. Today I saw 27 yellow alarms once I reset the system to look at the alarms. It's not a high traffic situation. Everything else in the system seems to function fine when the trouble is occuring. AT&T has checked the T1 on several occasions and has indicated that there is no trouble on there end. As a precaution they tell me that they did replace their equipment in the CO. I'm using the combo T1 / PRI card, verifed my settings numerous times with tech support, everything is set correctly. I'm also using an Adtran ACE CSU. AT&T will usually show the trunks busied out in their switch when this occures, they tell me this is automatic thing. A reset from their end or from the XTS will clear the trouble in a couple of minutes. Anyone experience this type of trouble on an XTS? Is this T1 / PRI card pretty reliable? Tech support says to run etrace and leave a laptop connected indefinitely.

Any suggestions would be appreciated. Thanks!


Greg Veile
Vodavi Telephones & Equipment
Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217271 01/27/10 04:09 PM
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If you're getting yellows the far end is loosing signal.


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Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217272 01/27/10 04:42 PM
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Greg:

First, what software is running on the XTS? Second, what kind of switch is at&t using? If it is not a real switch (DMS, ESS, etc.), you are going to have problems. Try to get someone at at&t to verify the serving switch and we might be able to help with suggestions.


Ed Vaughn, MBSWWYPBX
Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217273 01/27/10 04:52 PM
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Ed, this reminds me of the STS PRI troubles at our common customer site in Fredericksburg.


www.myrandomviews
"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.
Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217274 01/27/10 08:03 PM
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gregv Offline OP
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I will check into that tomorrow, thanks for the input.

Also, I'd like to hear more about the STS PRI problem. I had one installed lasy year and it was on a Cisco soft switch. We encountered numerous problems loosing sync.


Greg Veile
Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217275 01/27/10 08:26 PM
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NIU, facilities, soft switch. these are just some of the things I have dealt with. I've only had two bad XTS T1 boards ever. While fighting with the provider, I usually show my customer where the line in is located on the CSU. By unplugging the T1/PRI at that point, there is no keep alive to deal with. Then when plugging it back in, a loop back almost always resynchronizes it. While this doesn't completely rule out a local hardware issue, it really suggests that it is something in the CO. What I really hate is when the CO loops it down for testing, says no problem found, then loops it back up. They just don't seem to realize that the act of looping it down and up resets the circuit. It is now up to us to do part of their work for them before they invest a knowledgeable tech on our trouble ticket.


- Dave S. -

You can never appease your ideologue opponents.

Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217276 01/28/10 08:01 AM
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gregv Offline OP
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I have more information regarding the my XTS PRI issue.

The Vodavi system has V.300-2FE3 software,
the AT&T circuit is on a 5 ESS switch.

They did tell me that it is on a combination of fiber and copper by the time it reaches the customer site.

AT&T has issued a cronic trouble ticket on the problem and they're looking into it.

Any thoughts on what I might be able to do on my end? Thx.


Greg Veile
Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217277 01/28/10 08:18 AM
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How far away is the central office the pri originates from? If you are at the end of the loop you could have problems. That was the issue with the STS pri that keep dropping in Fredericksburg.


www.myrandomviews
"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.
Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217278 01/28/10 10:08 AM
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gregv Offline OP
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I'm guessing aprox 8 to 10 miles. I do know that this same customer also has aprox 3 other T1 circuits for differnet data applications that are pretty trouble free. I would assume with data applications they could keep retransmitting packets and you might never be aware of this if there was trouble, where as with voice you would definitely experience audio problems.

If we are at the end of the loop do we have any other options? Go back to pots lines? They may be old and traditional but at least they work.


Greg Veile
Re: XTS-IP PRI TROUBLE, INCOMING CALLERS RECEIVE BUSY SIGNALS
#217279 01/28/10 03:53 PM
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If it is 8 miles of copper...its a major issue. You might try cheating the CSU and set it for a longer LBO and try to boost the signal a bit and see what happens.


www.myrandomviews
"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.
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