[Asterisk-Users] Digium Wildcard T1 Compatibility

[Dave Weis]

On Mon, 25 Oct 2004, Cirelle Enterprises wrote:
> ----- Original Message -----
> From: "Steve Underwood" <steveu at coppice.org>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com>
> Sent: Monday, October 25, 2004 9:21 AM
> Subject: Re: [Asterisk-Users] Digium Wildcard T1 Compatibility
> | >
> | >for what it's worth, we were told to use RJ48C (Std Ethernet Cable)
> | >
> | RJ48C is *not* standard ethernet cable. The twisted pairs are grouped
> | differently. Ethernet cables work OK for T1s if they are only 2 or 3
> | metres long. Long ethernet cables give high error rates when used for T1s.
>
> According to the t1 techs I've been dealing with, a standard ethernet cable
> will work (we have been using a 3 foot segment approx 1m)  In fact the only
> configuration that lights all lights is a standard ether cable. T1 cross-over
> doesn't create a proper link and lights on the t100p and smart jack indicate
> a failed condition.

The pairs in an ethernet cable are the same pairs as a t1 cable, they are 
paired 1&2, 3&6, 4&5, 7&8. T1 uses 1&2 and 4&5, ethernet uses 1&2, 3&6. If 
you have a good cable it should work fine. Going too long of a distance 
from your t1 mounting may required a higher LBO on each end to compensate 
for the additional copper. Also make sure you are using 24 awg wire, not 
the 26 or 28 awg in most patch cables.

dave


-- 
Dave Weis             "I believe there are more instances of the abridgment
djweis at sjdjweis.com   of the freedom of the people by gradual and silent
                       encroachments of those in power than by violent
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