>
> >Could anyone tell me how the pin-outs on an
> >ATP connector(they are labeled 1,2,3) would
> >map to a 25-pin connector, a modem port used
> >for a serial connection(pins 2,3,7).
> >This information would be appreciated asap.
>
> Per the DTC Cabling and Racking Guide (Part # 5961-0373)
> Page 2-25 RS-232 DB25 direct connection to HP 3000 ATP
> ports (3-pin connection)
>
> 25-pin male connector to DTC 3-pin male connector to ATP
> 1-PGND
> 2-RD (input) <-----------------------------3-ATP TD (output)
> 3-TD (output)---------------------------->2-ATP RD (input)
> 7-SGND------------------------------------1-ATP SGND
> 8-RTS (output)
> 22-CTS (input)
>
> Hope this helps.

This pinout shows how to connect a DTC (25-pin) port to an ATP (3-pin)
port for a 3000-to-3000 connection.

In general:
         ATP pin 2 is the same as DB-25 pin 2
         ATP pin 3 is the same as DB-25 pin 3
         ATP pin 1 is the same as DB-25 pin 7

Thus, the example shown above is a "2-3 cross-over cable."
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Ross Scroggs                         email: [log in to unmask]
Telamon, Inc.                          CIS: 76011,2234
492 Ninth Street, Suite 310          voice: 510-987-7700
Oakland, CA 94607-4098                 fax: 510-987-7009
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