nanog mailing list archives

Re: HSSI-adtran


From: Philip Lavine <source_route () yahoo com>
Date: Mon, 20 Sep 2004 10:26:20 -0700 (PDT)


To all,

I tried the attenuator and they failed to provide any
relief. 

Philip
--- Alex Bligh <alex () alex org uk> wrote:




--On 20 September 2004 07:56 -0700 Philip Lavine
<source_route () yahoo com> 
wrote:

I am having a problem witha DS3 that terminates
into a
Adtran CSU (T3SU-300) and then into a 7200 with
HSSI.
I can not ping with a 0000 data pattern and I
experience packet loss and errors when I pass TCP
traffic.

Adtran recommended an attenuator.

What is the issue here? Is the signalling
incompatible
with a PA-T3+. Should I be wasting my time with an
external CSU?

Last time I looked, PA-T3+ were even MORE fussy
about the need
for attenuation than the non-"plus" variants (of the
"never actually
work with a BT DS-3 delivered as standard" sort of
fussy). So yes
you are probably wasting your time with an external
CSU, but you
are also quite likely to need attenuators anyway.

Alex




                
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