Oki RS-422 - Manual (Page 19)

RS-232C/RS-422 Serial Interface Option 2-7
Serial
References for OpenVMS users
You can print to your laser printer via the serial interface option from an OpenVMS system, either
directly connected to the system or through a network device such as a terminal server.
It is recommended that DECprint Supervisor (DCPS) be used for printing. Please see the "Setting Up
Printers" chapter of the DCPS System Manager’s manual for information on creating a DCPS print
queue.
If DCPS will not be used, please see the "Setting Up and Maintaining Queues" chapter of the OpenVMS
System Manager’s manual for information on setting up print queues using the OpenVMS print sym-
biont.
RS-232C Serial Cable Pin Assignments
Eight pins of the 25-pin serial cable are utilized for the RS-232C standard:
RS-422 Serial Cable Pin Assignments
Five pins of the 25-pin serial cable are utilized for the RS-422 standard:
• • •
Pin No. Signal Direction Description
1 GND Frame Ground
2 TXD Out Transmit Data
3 RXD In Receive Data
4 RTS Request To Send
5 CTS In Clear To Send
6 DSR In Data Set Ready
7 GND Logic Ground
20 DTR Out Data Terminal Ready
Pin No. Signal Direction Description
1 GND Frame Ground
15 RXD - In Receive Data +
17 RXD + In Receive Data -
19 TXD - Out Transmit Data -
25 TXD + Out Transmit Data +