[c-nsp] Signal too "hot" for PA-A3-T3

[Rick Kunkel]

On Fri, 17 Aug 2007 jeffc at supranet.net wrote:

> Quoting Rick Kunkel <kunkel at w-link.net>:
> 
> > Hello all,
> >
> > I just went through a 2-day troubleshooting session, due to a bunch of
> > errors using a PA-A3-T3 and a third party's mux.  In the end, upon the
> > advice of a couple of people, we put a signal attentuator inline, and the
> > errors have stopped.
> >
> > I already mentioned that the module of ours was the PA-A3-T3.  I don't
> > know who makes the mux.  The coax between these devices is about 35 feet.
> > The attenuator is supposedly around 10db.  Using a testing tool, I'm told
> > that the signal strength coming from their equipment went from about 2.4db
> > to -7.6db.
> 
> If it's 35 feet end-to-end between PAs, then I'd guess it's a bit short for a
> DS3 and the signal levels might be higher than expected.  OTOH 35 feet from a
> demarc isn't too unreasonable.   (Our distance from demarc is a few hundred
> feet.)  Did you set the cablelength parameter on the interface on IOS?  IIRC it
> helps set the signal strength range for a given build out.
> 
> Cheers,
> 
> Jeff C.
> 

In the interface config, there's the IOS command "atm lbo short" that is
the default, AFAIK.  Yup... just tried it...  That's for anything under
225 feet.

No consequence now, I suppose... this is all just purely academic...

THanks,

Rick Kunkel