[Asterisk-Users] Hardwiring a Tellabs echo canceller - help req

[gw at adcomcorp.com]

Dan, Basically you go send tip > send tip, receive tip > receive tip and
so forth on both connectors.

I needed to use one cat 5 out of the ec to the channel bank, and one
crossover t1 cable to the zaptel card.  Receive in means receive
basically (because it's the incoming signal).

You should be able to loop the card to see if it's working, either with
a straighthrough or a crossover, I don't recall.... If it loops you'll
get AIS Loop on the card (you'll notice it)

Greg



-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Dan Elder
Sent: Friday, January 20, 2006 3:14 PM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] Hardwiring a Tellabs echo canceller - help req

Hi All, Greg has been a huge help getting me going with this tellabs
echo can, but I'm still having some problems getting it to work... I
suspect I wired it up incorrectly, so I thought I'd see if anyone can
point me in the right direction. Digium tech support pointed me to this
doc for a standard
T1 cable:

http://www.arcelect.com/RJ48C_and_RJ48S_8_position_jack_.htm

which looks like it means:

pin1 = recieve ring
pin2 = recive tip
pin4 = send ring
pin5 = send tip


So I treated the bottom part of the diagram like a noraml cat5 cable &
connected it in this way:

Zap side | 2572 side
--------------------
pin 1 <=> pin 25
pin 2 <=> pin 21
pin 4 <=> pin 10
pin 5 <=> pin 6


on the T1 side I have:

T1 side | 2572 side
---------------------
pin1  <=> 26
pin2  <=> 22
pin4  <=> 9
pin5  <=> 5

In the wiki page for these pinouts are listed as
T1 side(drop)

  5 Send In Tip
  9 Send In Ring
 22 Receive Out Tip
 26 Receive Out Ring

Zap side (line)

 21 Receive In Tip
 25 Receive In Ring
  6  Send Out Tip
 10 Send Out Ring

and I'm not sure what the 'in' & 'out' desinations mean....

can anyone help me or point me in the right direction for wiring this
bugger up? perhaps I did do it correctly & the can isn't configured yet
(just did that, but can't test till 2night when the office clears out)

Thanks in advance for any insights

Dan

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