Rs-232 To Rs-232 Dce Cable; Dsr; Dtr - 3Com SuperStack II 32x Installation Manual

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.
To RS-232 port on bridge/router
1 2 3 4
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Name
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
Figure 2-14 RS-232 Straight-Through Cable
3Com does not sell this cable.
5 6 7 8 9 10 11 12 13
Abbr Pin
1
Chassis GND
TxD 2
3
RxD
RTS 4
CTS 5

DSR

6
GND 7
8
CD
TxC (SCT) 15
17
RxC (SCR)

DTR

20
21
RL
RI 22
24
TT (SCTE)
TM 25
Connectors and Cables
To modem/TA or CSU/DSU
1 2 3 4 5 6 7 8
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Pin Abbr Name
Chassis GND
1 Shield
TxD
2 Transmit Data
RxD
3 Receive Data
RTS
4 Request to Send
CTS
5 Clear to Send
DSR
6 DCE Ready
GND
7 Signal Ground
CD
8 Carrier Detect
TxC (SCT)
15 Transmit Clock
RxC (SCR)
17 Receive Clock
DTR
20 DTE Ready
RL
21 Remote Loopback
RI
22 Ring Indicator
TT (SCTE)
24 Transmit Clock (DTE Source)
TM
25 Test Mode
2-17
9 10 11 12 13