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Re: (ASCEND) Odd Framing on a Pipeline 130

Bill
	I would recommend that you don't take telco's word that the
problem is the P-130.  I recommend that you do the following to eliminate
telco portion of the circuit.

I) have telco conduct a class A testing.  This would require that they put
two T-Bird testers inplace and they run head to head.  This issually takes
about 2 hours.  Telco can then see if they are seeing any AMI on the line.

II) Have them put a loop on the CSU for about 1 hour and have them test to
see if there are any error's.  Make sure this is done for both portion of
the circuit.

III) Have telco how telco has configured clocking on the circuit.  Most
circuit are provisioned to get clocking from network. 

IV) Make sure that the circuit is provisioned for 128K.  Ask telco how
many DSO do you have on this DS1.

I hope this is helpfull.  It's highly unlikely that four P-130's could be
bad. 

Good Luck

Mohamed A. Hirse

On Fri, 20 Mar 1998 wmoniz@aracnet.net wrote:

> 
> Hi.  We have two Pipeline 130s connected across a 128K fractional T1.  The
> problem is we are getting mysterious packet loss on the connection.  We
> have replaced both units thereby eliminating the possibility of a bad CSU.
> The Telco has done extensive testing on the line and still swears that all
> test run clean. 
> 
> They suggested that the trouble could be something that the Pipeline is
> doing under normal operation.  The tech said that it may be
> trying to steal extra bandwidth by shoving additional data into the
> reserved upper frame segment.  Since the T1 is deframed and stripped to 2
> channels at the switch this extra data would be lost.  His theory is
> supported by the fact that the problem get much worse under load.  The
> Pipeline could be trying to stuff even more extra stuff in.  Does any one
> know of a similar case?  Is this really something the Pipeline 130 does
> normally?
> 
> I should also mention that we are in Canada and I'm not sure if there's
> some difference between the Canadian standard and the standard the Pipe
> was built for.  We are using ESF B8ZS.
> 
> Thanks for any help you can give me.
> 
> Bill Moniz
> AracNet.
> 
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