Backup D Channel

[JustinKredible]

Hey everyone,

I have a 3300 CX with two T1/E1 combo cards. The first card has a working PRI on it, full 23B+D. The customer got a second, partial PRI, 10B+D. The Telco says that the 2nd PRI is for overflow and a BACKUP D channel. I can't find anywhere in the 3300 system admin tool to program this. Looking at the docs and help files, it seems that you can program a backup D channel on an NSU. Does this mean that we can't on the embedded PRI?

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You can't fix stupid...

But you sure can profit from it!

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[MitelInMyBlood]

It's been my experience with MITEL pbx systems that if you lose the D channel you also lose all trunks in the same span as the D channel. I interpret that to mean you cannot have a T1 (or a fractional T1) and use it for channelized voice service without a D channel associated with each T1.

However, I've been proven wrong many times....

 

[LoopyLou]

YOu can for sure on NSU, will need to check for the embedded.