asterisk users - Apr 2006 - Pinouts for T1/E1 crossover cable WAS "RE: whatcable to connect a legacy PBX to a TE410P ?"

I for one think it is a great idea to buy a book with hard earned money and wait
a few days to a week just to get an answer to a question that is freely
available on the internet immediately.

Hard pressed to think of anything in the "book" that is not on with
wiki with more up to date and useful information.


-----Original Message-----
From:	Alexander Lopez [mailto:Alex.Lopez@OpSys.com]
Sent:	Sat 4/22/2006 11:59 AM
To:	Asterisk Users Mailing List - Non-Commercial Discussion
Cc:	
Subject:	Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users]
whatcable to connect a legacy PBX to a TE410P ?"

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@lists.digium.com
[mailto:asterisk-users-bounces@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@yahoo.com]
Sent:	Sat 4/22/2006 11:09 AM
To:	asterisk-users@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@signate.com
www.signate.com



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