3Com PathBuilder S21x Installation Manual page 51

V.35/V.36 DTE
Cable Pinout
PathBuilder S21x Switch Cabling
The following table shows the DTE pinouts forV.35 and V.36 cables.
Pin
1 SHIELD/FRAME GROUND
2 TRANSMITTED DATA A
3 RECEIVED DATA A
4 REQUEST TO SEND
5 CLEAR TO SEND
6 DATA SET READY
7 SIGNAL GROUND
8 DATA CARRIER DETECT
13 TRANSMIT CLOCK B
14 TRANSMITTED DATA B
15 TRANSMIT CLOCK A
16 RECEIVED DATA B
17 RECEIVE CLOCK A
18 RECEIVE CLOCK B
19 RECEIVE CLOCK B
20 DATA TERMINAL READY
21 TRANSMIT CLOCK B
22 EXTERNAL TRANSMIT CLOCK B
24 EXTERNAL TRANSMIT CLOCK A
25 TEST MODE
(V.36 ONLY).
Function/Signal Name
V.35/V.36 Cable
B-9