sundance-communications.com/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Legend extensions Drop calls

Nah, I'm still focusing on the phone displays going out. No way is that caused by a carrier problem. Could all those errors be caused by something like a bad power supply? I would think that would certainly cause a loss of signal.

-Hal

Like Hal said, focus on the equipment. What version of power supply is it, 391A? or 391C?

Ok I pulled another report off SPM and I see more DS1 loss of signal errors.
I was beginning to think my issue was a power supply in the first carrier because all the complaints from extensions riding on the 4 cards that are powered up by the supply. Unfortunately the complaints are all over the map I would then have to suspect all power supplies.

Also one does not have to be on the phone for the snap crackle and loss of display to occur.

At this point my I can engage the carrier to check the t-1 once again. We have a regular voice t-1

Can tell me how in the world you think it's possible for a T1 problem to blank the displays on the phones??

-Hal

It is possible that the power supply in the main carrier is failing. If you were to shut down that carrier (but leave the other power supplies turned on), do the displays go blank? The processor resides in the main carrier, so if it loses power, it could knock down all of the phones in the system. When the T1 card goes down, the service provider's switch will see a loss of signal and transmit a Yellow Alarm. I'm not sure how the Legend interprets such an alarm.

ok, so if the main power supply were going bad and it bleeped for 10 seconds then any other call that was in process would be dropped because the processor is in the main carrier. Correct? There is a correlation between the timing of the 6C01 DS1 LOSS OF SIGNAL ALARM appearance on the system error report and the call dropping, that is why I suspect the t-1. The processor would have to be online to record the signal loss I assume. If we think it is the power supply then it make sense to swap it with the 2nd or 3rd carriers and then see if only the extensions on that carrier experience problems. Do you concur???

I actually have both the 391c1 was on the main carrier with the processor I swapped it with a 393a3 that was on the 3rd carrier and will see what happens.

When I shiut down the power unit in the carrier the phone displays go blank.

This popping cracking issue is related to the t-1 flacking out. Each time I observe my phone crack. I can see on the SPM error log " DS1 LOSS OF SIGNAL"

Every time the LEC tests it is clean. They attached to the card in the smart jack and they saw the hits. They have me on new cards - new pairs so hopefully the intermittant problem will go away.