Null modem – Symbol Technologies VRC 6940 User Manual
Page 101
D-4
VRC 6940 Product Reference Guide
Null Modem
A null modem cable is used for:
!
downloading programs from a PC to a VRC 6940 terminal
!
unloading memory contents from a VRC 6940 terminal to a PC
The cable has a 16-pin male circular connector, and a 25-pin female D-Connector.
shows the pin-outs for both connectors.
Table D-4. Null Modem Pin Out Descriptions
VRC6940 16-Pin Circular Connector
(Male)
Host 25-Pin D-Connector
(Female)
Pin
Name
Pin Name
1
DCD
20
DTR
2
RXD
2
TXD
3
TXD
3
RXD
4
DTR
6, 8
DSR, DCD
5
GND
7
GND
6
DSR
20
DTR
7
RTS
5
CTS
8
CTS
4
RTS