Lucent Technologies PortMaster PM-2 Hardware Installation Manual page 70

X.21 Cable
X.21 Cable
Table B-7 gives pinout information for an X.21 cable with DB-25 and DB-15 connectors.
Pins not listed have no connection.
This cable is not supplied, but can be ordered from Lucent. Specify product code
CBL-X21-6.
Table B-7
V.35
PortMaster DB-25
Port W1 Pin
7 B
4 C
5 D
8 F
3 R
16 T
17 V
15 Y
19 X
13 AA
2 P
14 S
B-12
Synchronous X.21 Cable
Name Definition
SGND Signal Ground
RTS Request to Send
CTS Clear to Send
CD Carrier Detect
RXA Receive Data
RXB Receive Data
RX CLKA Receive Timing
TX CLKA Send Timing
RX CLKB Receive Timing
TX CLKB Send Timing
TXD A Transmit Data
TXD B Transmit Data
X.21
DB-15
Pin Name
8 SGND
10 Control B
3 Control A
5 Indicate A
4 RXA
11 RXB
6 CLKA
13 CLKB
2 TXA
9 TXA
Communications Server Hardware Installation Guide