atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Legend extensions Drop calls

We have a Lucent Legend R6 with a t-1 card and 12 analog lines with a total of 64 extensions.
I have a problem that the users describe as “popping and cracking” which results in the dropping of the call they are on. Their display goes out. It is as if the line cord to the phone is disconnected for a second then and reconnected. The phone extension comes back, but not with the call.
The problem is not isolated to the extensions on one line card. It is happening on slots 2 (408 GS/LS ),3 (008MLX),and 4(008MLX). I have no idea what is causing this. Is it the main processor getting ready to go out??
What do I need to be looking for to narrow down what the problem is?

"popping and cracking" noise on calls taking place on a t1 is sometimes caused by timing slips.

Almost sounds like station wiring to me.........
It's one of those problems where you need some spare hardware and time to find.

I agree with the T1 giving problems, however I never seen a T1 reset a set like your descriing.
Id still have your T1 checked.

If the display on the phone goes out it isn't the T1. Like Mike says I would look at the station wiring but if it's happening across a number of extensions and system mods then yeah, I would suspect the system. You're going to need spare equipment to troubleshoot, hopefully you have a processor and mods on hand.

-Hal

Also....there could be a problem with the carrier's power supply. But, as Hal said, have a spare set of hardware on hand and troubleshoot the system. Start with the system error log and go from there.

Thanks for all the helpful posts. I have had the T-1 checked and At&t found nothing wrong. The extensions - people that reported problems are on the first 4 cards so It could well be the first Power supply in the main carrier supporting the processor that is flaking out. I suppose I could swap it with one of the other 2 on the system and see if the problem follows the power supply . Is that logical?
Where does one obtain the system error log . Can that be accomplished in SPM?

Yep, SPM it is, under Maintenance, System, ERROR LOG.

There you can look at Permanent and Transient. You can also do a PRINT of it in Programming & Print.

But it's best to look under maintenance 'cause you can use the DROP button to delete them as you go.

As far as a TEST of Station Wiring, Touch INTERCOM (SA) Speaker, and then dial *00 (Star Zero Zero). That puts the extension into TEST MODE and if you hear SNAP CRACKLE & POP THERE it indicates a problem with the Wiring to that extension.

Merlinman,
I bounced on SPM and ran the error log.Slot 5 with the 100D T-1 card has all the errors as follows
ON HOOK BEFORE READY 8405 22 times
ON HOOK BEFORE WINK 8404 88 times
DS1 LOSS OF SIGNAL ALARM 6C01 18 times
DS1 MISFRAME ALARM 6C09 3 times

Why would I be having so many errors on the t-1 card? Is this normal. Is it a problem with the provider or the actual 100D t-1 card.

The BIG RED FLAG here is LOSS OF SIGNAL. That means the two ends weren't seeing each other. MISFRAME means they couldn't "SYNC" up.

This very well could be a CARRIER PROBLEM, a CIRCUIT PROBLEM (Bad Connections???) or (But usually seldom) a problem with your T1 Module.

AT&T said "there is nothing wrong", how did they test it, and WHERE did they test it?

I have not seen the word PRI mentioned, therefore, if this is not a PRI, then you can do a LOOP BACK to your carrier when they are testing and get more accurate results.