9 Pin D Serial Port To A Modem; 9 Pin D Serial Port Loop Back Connector - Brainboxes CC-357 User Manual

PCI VelocityRS232/422/485

9 Pin D Serial Port To A Modem.

If you are connecting a MODEM to a 9 pin D Serial Port then you
will NOT need a cross over cable and a straight through cable
connected as the 9 to 25 pin adapter given in Figure 4-5.

9 Pin D Serial Port Loop Back Connector.

A loop back connector can be used to echo RS232 data transmitted
by a serial port back into its own RS232 receiver. In this way, the
function of the serial port can be tested.
For an AT style Serial Port use the a female 9 way connector wired
as in Figure 4-4.
Figure 4-4. 9 Pin D Serial Loop Back Connector.
9 PIN D CONNECTOR
SCHEMATIC REPRESENTATION:
ACTUAL REPRESENTATION:
3
2
7
8
6
1
4
Chapter 4 Page 68
RS232 Pinouts & Cabling
25 PIN D CONNECTOR
2
3
4
5
6
8
20