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

[David Barak]

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

> On Tue, 2 Aug 2005, David Barak 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.
> 
> Yeah, that is what I've always thought. However, the
> PA-MC-T3 does not 
> seem to support M13.
> 
> core1.cleveland(config)#controller t3 1/0/0
> core1.clev(config-controller)#framing ?
>   auto-detect  Application Identification Channel
> Signal
>   c-bit        C-Bit Parity Framing
>   m23          M23 Framing Format
> 
> We are running the following PA-MC-T3 revision:
> 
>         PA Bay 0 Information:
>                 CT3 single wide PA, 1 port
>                 EEPROM format version 1
>                 HW rev 1.00, Board revision A0
>                 Serial number: 17814706  Part
> number: 73-3037-01
> 
> We had tried using "auto-detect" originally, but
> this was bad bad bad, so 
> on the advice of Adtran, we locked it to C-bit.
> 
> Am I missing something? Should M23 work w/ M13? 

Sorry, bad typo on my part - yes, you want M23.  M13
is for the T1s which are part of an M23 T3.

-David

David Barak
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