sundance-communications.com Forums Telephone Services T1's, CSU's and DSU's Dialogic card throwing errors

Have a Televantage system, and the windows event log is showing that the D channel went down and came back up 44 seconds later, it also seems that it is hard to troubleshoot why calls would drop having 4 PRI's all dialogic cards, replaced wiring on one card, and connector on another, circuit tests come back clean

If the D channel went down every T-1 PRI it's controlling would drop calls, you may only have one D channel.

What Bill said. 1 PRI=23B+1D. 4 PRIs=92B+1D.

Some carriers are known to give you 1 D channel with each PRI, some only 1.

Inquire of your carrier.

They should also have error logs and be able to tell you what caused the D channel to drop.

Who is your Carrier, BTW?

Sam

FAS = 1D per 23Bs.
MFAS = 1D for more than 23Bs.

Carrier is AccessOne

The issue is 44 second down time and combing back up isn't long enough for it produce data for them to gather, they sent the circuits to AT&T to test and they are clean

They are giving us 1 D channel per PRI

You need to ask the carrier to dispatch a tech with a Tbird or equivalent PRI tester to determine the exact cause of the problem. To lose 4 D channels at the same time kind of points to a common issue like a Smart Jack nest with outboard power supply that might have gone bad.

Rcaman

They stated that the smart jack tests come back clean, it's only 1 PRI card that loses the D channel for 44 seconds, even removing the problem card we still see issues. even though they say there tests come back OK from the circuit

Of course their remote tests come back clean. They can only see a very short time period. You should demand a tech be sent to the site and do a stress test FROM THE SITE. That is the ONLY way they can see if there's a problem on the span.

Rcaman