[c-nsp] Adtran MX-2800 to PA-MC-T3

[David Barak]

--- Greg Boehnlein <damin at nacs.net> wrote:

> Hello,
> 	We have a problem that we have exhausted all
> available resources 
> on solving, and we are running into a dead end. We
> have several T1 
> circuits, from various LECs provisioned into a
> single MX-2800 MUX at our 
> location. We then tie that mux into a PA-MC-T3 card
> on a 7507 in a 
> VIP-2-50 to terminate the circuits. The DS-3 cabling
> is 25 feet in 
> length and we have (per Cisco reccomendations) a 6
> db attenuator on the 
> PA-MC-T3 RX leg. We are running CBIT, w/ the MUX
> providing timing.
> 
> We continue to receive LCVs, C-Bit and P-Bit framing
> errors, and the DS1 
> circuits will occasionally bounce.
> 
> So far we have tried:
> 
> 1. Replacing the cabling.
> 2. Replacing the attenuators.
> 3. Replacing the PA-MC-T3 card.
> 4. Replacing the MX-2800 MUX.
> 5. Replacing the VIP-2-50 card.
> 6. Changing clocking directions.

Are you sure you're supposed to be running c-bit
between the MUX and PA-MC-T3?  When I've built these,
I've always needed to use M13.



David Barak
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