Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] what cable to connect a legacy PBX to a TE410P ?"

[Alexander Lopez]

Can't anyone stop self-promotion and tell the poor guy what he needs.

A T1/E1 X-over cable using an RJ-45 (8-cond.) is pinned out as follows:

1 - 4
2 - 5
3 - NU
4 - 1
5 - 2
6 - NU
7 - NU
8 - NU

NU = Not Used

I have not in my experience seen any problems with using a Good Quality
Cat5 vs. Cat 3 (telco standard) cable for X-connects.  YMMV, but you
should be fine. As far as the shielding goes, I use UTP cables and
Connectors all the time and some of my X-connects run over 100 feet.



-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Steve
Totaro
Sent: Saturday, April 22, 2006 11:49 AM
To: Paul Mahler; Asterisk Users Mailing List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] what cable to connect a legacy PBX to a
TE410P ?

LOL


-----Original Message-----
From:	Paul Mahler [mailto:psvwm at yahoo.com]
Sent:	Sat 4/22/2006 11:09 AM
To:	asterisk-users at lists.digium.com
Cc:	
Subject:	Re: [Asterisk-Users] what cable to connect a legacy PBX
to a TE410P ?

A T carrier cable is not the same as an ethernet cable. A T carrier
cable uses a real metal shielded RJ-45 and loosely twisted pair wire.
With most modern T carrier equipment, you can use a CAT-5 ethernet cable
instead of a real T carrier cable. A T-carrier crossover cable does not
have the same wiring pattern as a crossover ethernet cable. With an
older piece of equipment like the Matra, I would be tempted to purchase
a real T carrier crossover cable. This is covered in my book, by the
way. 
 
>Louis-David Mitterrand wrote: 

>Hello, 
 >
>I am about to put an asterisk server between the telco E1 and our old
Matra PBX.   
>Should I use an ethernet cross cable? Something else?

  
Paul Mahlerpmahler at signate.com
www.signate.com



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