A-2
A
PPENDIX
A: P
IN
A
SSIGNMENTS
Figure A-1 shows pin numbers for serial connectors on the 16-port
asynchronous module.
Figure A-1
Serial Connector Pin Numbering
The communications server acts as a DCE device. The 50 pins in each serial
connector correspond to eight DCE ports. Port 0, for instance, consists of
pins 1, 2, 3, 26, 27, and 28; port 1 consists of pins 4, 5, 6, 29, 30, and 31; and
so on. The circuit assignments for pins on the serial connector depend both
on the software version running on the communications server and on the
software configuration.
Software Version 6.0
Table A-2 shows circuit assignments for software version 6.0 (including
6.0.2). In these versions, DTR and RTS share pin 1 on port 0 (and also pins 4,
7, 10, 13, 16, 19, and 22 on the other ports). DCD and CTS share pin 28 on
port 0 (and also pins 31, 34, 37, 40, 43, 46, and 49 on the other ports). This
hardware configuration is called
single-input
.
In the default software configuration, pin 1 functions as DTR (to signal the
communications server to disconnect) and pin 28 functions as DCD (to
signal when a hangup has occurred). This configuration is referred to as
session control
. Flow control, if needed, must be provided by software. In the
default software configuration, the -TERM FlowCtrlFrom and FlowCtrlTo
parameters are set to Xon_Xoff. These parameters can also be set to
Enq_Ack or to None without changing the circuit assignments.
In this software version, you can configure CTS/RTS hardware flow control
by setting FlowCtrlFrom and FlowCtrlTo to CTS_RTS. In this configuration,
pins 1 and 28 (and the corresponding pins on other ports) act as RTS and
CTS, not as DTR and DCD.
50
26
1
25
26
50
1
25
CS3000BookFile Page 2 Tuesday, October 15, 1996 5:12 PM
