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2-16 CHAPTER 2: OVERVIEW
UNIVERSAL to RS-232 Direct Connect Cable
This cable connects the UNIVERSAL port on the bridge/router to the
RS-232 port on an SNA legacy device.
Figure 2-13 UNIVERSAL to RS-232 Direct-Connect Cable
You can order this cable from 3Com (part number 3C8123).
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
25-pin male connector
1
4
14
36
28
16
32
18
10
19
1
5
3
2
8
20
6
24
15
17
7
Shield
Request to Send
Receive Data
Transmit Data
Carrier Detect
DTE Ready
DCE Ready
Transmit Clock
Transmit Clock
Receive Clock
Signal Ground
Shield
Clear to Send
Transmit Data
Receive Data
Request to Send
Data Set Ready
Data Terminal Ready
Receive Clock
Transmit Clock
Signal Ground
Shield
CTS
TxD
RxD
RTS
DSR
DTR
RxC
TxC (out)
SG
Shield
RTS
RxD
TxD
DCD
DTR
DSR
TxC (out)
TxC (in)
RxC
SG
To SNA device
Name Abbr NameAbbrPin Pin
37-pin female connector
To UNIVERSAL port on bridge/router
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 26 27 28 29 30 31 32 33 34 35 36 37
SS2TRHWBook Page 16 Monday, May 5, 1997 3:11 PM