3Com SuperStack II 32x, Installation Manual

Page: 39 / 76

Connectors and Cables 2-17
RS-232 to RS-232 DCE Cable
This straight-through cable connects the RS-232 port on a SuperStack II
bridge/router to a standard RS-232 DCE device.
Figure 2-14 shows the pin assignments of the RS-232 cable.
Figure 2-14 RS-232 Straight-Through Cable
3Com does not sell this cable.
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
Name Abbr Pin Pin Abbr Name
25-pin male connector
25-pin male connector
Shield
Transmit Data
Receive Data
Request to Send
Clear to Send
DCE Ready
Signal Ground
Carrier Detect
Transmit Clock
Receive Clock
DTE Ready
Remote Loopback
Ring Indicator
Transmit Clock (DTE Source)
Test Mode
Shield
Transmit Data
Receive Data
Request to Send
Clear to Send
DCE Ready
Signal Ground
Carrier Detect
Transmit Clock
Receive Clock
DTE Ready
Remote Loopback
Ring Indicator
Transmit Clock (DTE Source)
Test Mode
Chassis GND
TxD
RxD
RTS
CTS
DSR
GND
CD
TxC (SCT)
RxC (SCR)
DTR
RL
RI
TT (SCTE)
TM
Chassis GND
TxD
RxD
RTS
CTS
DSR
GND
CD
TxC (SCT)
RxC (SCR)
DTR
RL
RI
TT (SCTE)
TM
1
2
3
4
5
6
7
8
15
17
20
21
22
24
25
1
2
3
4
5
6
7
8
15
17
20
21
22
24
25
To RS-232 port on bridge/router
To modem/TA or CSU/DSU
SS2TRHWBook Page 17 Monday, May 5, 1997 3:11 PM