X.21 Cable - Lucent Technologies PortMaster OR-HS Hardware Installation Manual

X.21 Cable

Table D-4 gives pinout information for an X.21 cable with DB-25 and DB-15
connectors. Pins not listed have no connection.
Table D-4
PortMaster
Port W1
7
4
5
8
3
16
17
15
19
13
2
14
Cable and Ethernet Specifications
Synchronous X.21 Cable
V.35
DB-25
Pin Name Definition
B SGND Signal Ground
C RTS Request to
Send
D CTS Clear to Send
F CD Carrier Detect
R RXA Receive Data
T RXB Receive Data
V RX CLKA Receive
Timing
Y TX CLKA Send Timing
X RX CLKB Receive
Timing
AA TX CLKB Send Timing
P TXD A Transmit Data
S TXD B Transmit Data
X.21
DB-15
Direction Pin
8
10
Output 3
Input
Input 5
Input 4
Input 11
Input 6
Input
Input 13
Input
Output 2
Output 9
X.21 Cable
Name
SGND
Control B
Control
A
Indicate
A
RXA
RXB
CLKA
CLKB
TXA
TXA
D-5