Re: HSSI-adtran

[Alex Bligh <alex () alex org uk>]

--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