Cabletron Systems KBU64 Rackmount - Manual (Page 13)

KBU64 Rackmount
User Manual
80-10100001-09 2–6
2.2.4 X21 Rear Interface Card
The User and Link connectors are both 15 way 'D'.
The pin assignments are as follows:
Pin
No. Circuit
No. Signal Name Assuming configured as
DTE
1 Ground Chassis Earth Common return
8 G Signal Ground/Chassis Earth Common return
2 Ta Transmit Data A Generator
9 Tb Transmit Data B Generator
3 Ca Control A Generator
10 Cb Control B Generator
4 Ra Receive Data A Load
11 Rb Receive Data B Load
5 Ia Indicate A Load
12 Ib Indicate B Load
6 Sa Signal Timing A Load
13 Sb Signal Timing B Load
2.2.5 V24 Rear Interface Card
The User and Link connectors are both 25 way 'D'.
The pin assignments are as follows:
Pin
No. Circuit
No. Signal Name Assuming configured as
DTE
1 101 Chassis Earth Common return
2 103 Transmit Data Generator
3 104 Receive Data Load
4 105 Request to Send Generator
5 106 Clear to Send Load
6 107 Data Set Ready Load
7 102 Signal Ground/Chassis Earth Common return
8 109 Data Carrier Detect Load
15 114 Transmit Clock Load
17 115 Receive Clock Load
20 108 Data Terminal Ready Generator