[c-nsp] Possible T1 clocking problem.

[Lee Starnes]

I would also look at speed setting. Not all versions of IOS default to 64K
per channel.

timeslots 1-24 speed 64.

-Lee

On Tue, Apr 17, 2012 at 11:54 AM, Jay Hennigan <jay at west.net> wrote:

> On 4/17/12 11:46 AM, Joseph Mays wrote:
> > We're setting up an HDSL4 t1 across two copper pairs. This is the first
> time I've ever turned up a T1 that was not telco provided. The smartjacks
> show the T1 as up (and extremely good quality, actually, strong signal and
> not a single bit error). On the CO side the T1 goes to a T3 multiplexer
> which is plugged into a channelized T3 card in an AS5400. On the remote end
> the T1 is plugged into T1 WIC in a 2600.
> >
> > Both ends show the T1 interface up, line protocol is down. Encapsulation
> is PPP, but all I ever see are errors. I've confirmed the wiring and every
> other aspect of the physical layer.
> >
> > Here is the show interface info from the AS5400 6 minutes after clearing
> counters on the interface.
>
> Clocking problems will usually come up but show slips.
>
> Things to check:
>
> Framing - B8ZS throughout (including the mux ports)?
> Linecode - ESF throughout?
>
> And a fat-finger that had us going for a while, staring at it wasn't
> immediately obvious...
>
> "timeslots 24" isn't the same as "timeslots 1-24".  :-)
>
>
> --
> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
> Impulse Internet Service  -  http://www.impulse.net/
> Your local telephone and internet company - 805 884-6323 - WB6RDV
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