[Asterisk-Users] Tellabs Echo Canceller

[Andrew Kohlsmith]

On Friday 24 June 2005 16:17, ewr at erols.com wrote:
> The shelf has 4 25-pair amphenol connectors.  The two on the line side are
> marked "Receive In" and "Send Out".   The 2 connectors on the drop side are
> marked "Send In" and "Receive Out". I will be connecting the echo canceller
> between a PRI and our asterisk box.  We recieve our PRI on an RJ-45 jack,
> so I assume I will need to make a cable that connects the "Receive
> Tip/Ring" pair from a Cat5 and wire it to pins 1 & 26 on the "Receive In"
> connector and take the "Send Tip/Ring" pair and wire them to pins 1&26 on
> the "Send Out".  The same thing will need to be done for the 2 drop side
> amphenol connectors so that I can plug an RJ-45 connector in to our
> Asterisk box.

It's easy to connect:

Network rx pair goes to your "send out".  Network tx pair goes to "Receive in" 
-- similarly your Asterisk-end rx pair goes to "Receive out" and your 
asterisk tx pair goes to "Send in".

I am guessing this shelf can handle 24 echo cancellation cards?  It seems a 
little odd to split the T1s up across 4 connectors but if you're terminating 
to BIX or something it really does make sense.

-A.