User manual

Computer Gateway User Manual B-8 5/96
B.2.7
B.2.7 RS-232C Standard (Modem Connection) Cable
• 15 meters, male-to-male connection
• Modem connected
• Both transmit and receive clocks are supplied by the modem
• RS-232C standard connector-pin assignment
Function CG Side Modem Side
Shield ground 1 1
Transmitted data 2 2
Received data 3  3
Request to send 4 4
Clear to send 5 5
Data set ready 6 6
Signal ground/common return 7 7
Received line signal detector 8 8
Line present (not RS-232C spec) 9 9
Logic ground 10 10
not used 11 11
not used 12 12
not used 13 13
not used 14 14
Transmit clock 15 15
not used 16 16
Receive clock 17 17
not used 18 18
not used 19 19
Data terminal ready 20 20
not used 21 21
not used 22 22
not used 23 23
not used 24 24
not used 25 25
Figure B-7 — RS-232C Standard (Modem) Cable 3225