Alexander Lopez
2006-Apr-22 08:59 UTC
Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] what cable 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 oldMatra PBX.>Should I use an ethernet cross cable? Something else?Paul Mahlerpmahler@signate.com www.signate.com _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
John Novack
2006-Apr-22 09:04 UTC
Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] what cable to connect a legacy PBX to a TE410P ?"
Alexander Lopez wrote:>Can't anyone stop self-promotion and tell the poor guy what he needs. >Seems to me that SOME self promotion belongs on the biz list, and for those considered in the "inner circle" it is OK here! Everyone is equal. Some are more equal than others JMO John Novack
Andrew
2006-Apr-22 11:51 UTC
Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] what cable to connect a legacy PBX to a TE410P ?"
Alexander Lopez wrote:>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 > >I have used cat-5 for everything communications. serial printers, dumb terminals, DS1 and even 10/100 ethernet. :-) It's easier to have it installed as a network jack and then use for whatever you need. ... Andrew McRory LinuxSystems Tallahasse, FL
Louis-David Mitterrand
2006-Apr-23 00:39 UTC
[Asterisk-Users] TE410P card connection (was: Pinouts for T1/E1 crossover cable)
On Sat, Apr 22, 2006 at 11:59:21AM -0400, Alexander Lopez wrote:> 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.Thanks for the info! Should I use a T1 cross cable to connect the telco's socket to the TE410P card? When I tried straight cat5 cables, both leds remained red at each end. However this E1 socket works fine with the Matra PBX, so it must be a cable problem or TE410P misconfiguration. Thanks, Here is my configuration: /etc/zaptel.conf: span=1,1,0,ccs,hdb3,crc4 span=2,1,0,ccs,hdb3,crc4 span=3,1,0,ccs,hdb3,crc4 span=4,1,0,ccs,hdb3,crc4 bchan=1-15,17-31 dchan=16 bchan=32-46,48-62 dchan=47 bchan=63-77,79-93 dchan=78 bchan=94-108,110-124 dchan=109 loadzone=fr defaultzone=fr /etc/asterisk/zapata.conf: ;; to telco context=default signalling=pri_cpe group = 1 channel => 1-15 channel => 17-31 ;; to old pbx context=international signalling=pri_net group = 2 channel => 32-46 channel => 48-62
Rich Adamson
2006-Apr-24 04:32 UTC
Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] what cable 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.It would probably be helpful for everyone reading this thread to understand what the differences are in the two types of cables. Primarily impedance matching, twists per foot, shielding, etc. For short runs, the use of cat5 vs proper T1 cables isn't likely to have any impact unless there is a fair amount of induction from electrical noise, etc. That can take the form of florescent fixtures, transformers, older CRT monitors, etc, etc. On longer runs, the shielded T1 cables are likely to provide better results particularly if there happens to be any electrical noise. Oh, and if shielded T1 cable is used, the shield at each end of the cable must be grounded. (Let's see how many can figure out how to do that via an rj45 plug. ;)
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