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

[Mark Phillips]

I think it is correct. Isn't that why they call it a Smart Jack? I've
only ever seen a regular cat5 cable used from the Smart Jack to the
device (router/PBX/CSU/DSU/whatever).

I believe the point of the smart jack is, amongst other things, to allow
for the use of readily available cables. 

I agree however that "back-to back" (PBX-PBX etc) you would need a
cross-over cable.

Mark

On Sat, 2006-04-22 at 18:14 -0400, Steven Totaro wrote:
> The "telco guys" probably did something non-industry standard and reversed send and receive in the jack that they plugged the CAT5 into.  Sure it works, sure it is easier, sure it is not the correct way of doing things.
>  
> Thanks,
> Steve
> 
> ________________________________
> 
> From: asterisk-users-bounces at lists.digium.com on behalf of Lacy Moore - Aspendora
> Sent: Sat 4/22/2006 2:55 PM
> To: Paul Mahler; Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users]whatcable to connect a legacy PBX to a TE410P ?"
> 
> 
> at&t (formerly SBC, formerly Southwestern Bell, formerly AT&T) just came out and installed my PRI.  FYI, they used Cat 5e cable.  No special T1 cabling that costs a fortune to buy somewhere, just plain old Cat 5e cable.  Guess what guys?  If they are using this as customers' sites, they are probably using it elsewhere. It's only as good as the weakest link, so you can go out and spend lots of money on "T1 cable", or just use Cat 5e like the telco guys do. 
> 
> 
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