[74250] in North American Network Operators' Group
Re: HSSI-adtran
daemon@ATHENA.MIT.EDU (Alex Bligh)
Mon Sep 20 11:59:30 2004
Date: Mon, 20 Sep 2004 16:57:15 +0100
From: Alex Bligh <alex@alex.org.uk>
Reply-To: Alex Bligh <alex@alex.org.uk>
To: Philip Lavine <source_route@yahoo.com>, nanog <nanog@merit.edu>
Cc: Alex Bligh <alex@alex.org.uk>
In-Reply-To: <20040920145636.34526.qmail@web51907.mail.yahoo.com>
Errors-To: owner-nanog-outgoing@merit.edu
--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
