Re: (PM) Diff betw T1-Span & Ethernet Cables?

Jacob Suter (jsuter@intrastar.net)
Sat, 15 Nov 1997 22:20:53 -0600

looking at the T1 & Ethernet pin-outs, I wouldn't try swapping them in a
oormal situation. Ethernet has some strange pin assignments, and yes
they are 'straight through' but they split two twisted pairs up which
would be bad for sheilding's sake.

JS

Mark Radabaugh wrote:
>
> The pinout on a T1 jack uses pins 1 and 2 for the receive pair and pins 4
> and 5 for the send pair. The pinout for 100Mb Ethernet uses 1 and 2 for
> receive, 3 and 6 for transmit. The color coding for the wiring is different
> and it is possible that the Ethernet cables don't have pins 4 and 5
> connected to anything. Having said all that --- The Ethernet cable seemed
> to work fine for me.
>
> Mark@woodville.net
>
> -----Original Message-----
> From: PM Mailing List <pmlist@cosmo.mitec.net>
> To: portmaster-users@livingston.com <portmaster-users@livingston.com>
> Date: Saturday, November 15, 1997 6:44 PM
> Subject: (PM) Diff betw T1-Span & Ethernet Cables?
>
> >
> >I know this sounds like a stupid, newbie question, but oh well, I don't
> >know where else to ask...:
> >
> >What is the exact type of cable that is used to connect the PM3 & the T1
> >box (we ordered Channelized T1) that the phone company drags to your
> >location? I assumed they were called T1span cables and ordered 2 of them
> >as well as 2 ethernet (100baseT) cables from a local vendor. The 4 cables
> >that were delivered were identical, so we tried all four. They all worked
> >for both the ethernet & for the T1. Are these cables interchangeable?
> >Thanks for in replies in advance..
> >
> >Sincerely,
> >Thomas
> >
> >
> >-
> >To unsubscribe, email 'majordomo@livingston.com' with
> >'unsubscribe portmaster-users' in the body of the message..
> >
> >
> >
>
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