[c-nsp] still cable pinout trouble ...

Gert Doering gert at greenie.muc.de
Tue Mar 29 13:25:07 EST 2005


Hi,

On Tue, Mar 29, 2005 at 07:40:51PM +0200, Florian Taeger wrote:
> I still got this #+$&%§ problem with connecting a WIC-1T Module to a leased
> line.
> 
> The end of the line is a RJ-45 Connector with pins 1&2 (RX) and 4&5 (TX).
> 
> But I still don't know how to connect this line to my wic-1t.

You need a CSU/DSU device to convert a T1 to a serial interface (X.21 or
V.35).  The WIC-1T cannot talk directly to the Telco network.

[..]
> But if I connect the RJ45 cable with the DB60 connector, the line does not work.
> If I use a cisco 2600 with an 1CE1B module (DB15 connector) this line works
> properly. So it is supposed to be a problem with the wiring of my adapter
> cable.

The NM-1CE1B has a CSU/DSU built in, and *can* connect to the Telco line
(and on the contrary, you can't do X.21 on a NM-1CE1B).

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de


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