Let's see.  Pulled out the old DTC cabling and racking guide and...  WOW!
There are lots of ways to build a cable for the RS-423 but no DB-5.  Here is
the one I believe you are after; DB-25 to RJ-45.

RJ45 at DTC             DB-25 at PC/printer
1 - RXa/Input           9 - TX-/output
2 - RXb/Input           10 - TX+/output
3 - TXa/Output          3 - RX-/Input
4 - CTS/Input           1 - PGND
5 - RTS/Output          7 - SGND
6 - TXb/Output          18 - RX+/Input

On the RS-232 side:

RJ45 at DTC             DB-25 at PC/printer
1 - RD/Input            2 - TD/Output
3 - TD/Output           3 - RD/Input
4 - CTS/Input           Not connected
5 - RTS/Output          Not connected
6 - SGND                        7 - SGND

RJ45 at DTC             DB-9 at PC/printer
1 - RD/Input            3 - TD/Output
3 - TD/Output           2 - RD/Input
4 - CTS/Input           Not connected
5 - RTS/Output          Not connected
6 - SGND                        5 - SGND

I personally had a question on the DB-9 connection from them manual.  I
don't remember pins 2 and 3, transmit and receive, being different between
the DB-25 and the DB-9.  I guess if it doesn't work you should try to swap
pins 2 and 3.

If you need anything else let me know.

Carl McNamee
Systems Administrator
Billing Concepts
(210) 949-7282



-----Original Message-----
From: Christian Lheureux [mailto:[log in to unmask]]
Sent: Wednesday, June 28, 2000 8:24 AM
To: [log in to unmask]
Subject: [HP3000-L] RJ 45 cabling


Hello fellow Listers !

I need to know what the cabling scheme is for RJ-45 ports hooked up to an
RS-423 and an RS-232 board in a DTC72. More precisely, I need the cabling
scheme to hook up the RJ-45 connectors to DB-5 (RS-423) and DB-9/DB-25
(RS-232) connectors.

As always, your help is greatly appreciated. Thanks in advance.

Christian Lheureux
Responsable du Departement Systemes et Reseaux
Head of Systems and Networks Department
APPIC R.H.
HPConnect Systems Integrator / HP3000 Expert / HP e-Partner
Tel : +33-1-69-80-97-22   /   Fax : +33-1-69-80-97-14 / e-mail
[log in to unmask]


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