Avaya X330WAN - Manual (Page 247)

DTE X.21
Avaya X330WAN User’s Guide 225
DTE X.21
Introduction
Figure A.2 shows the Avaya serial to X.21 cable and Table A.2 shows the pinouts.
The arrows indicate the signal direction – --> means DTE to DCE and <-- means
DCE to DTE.
Figure A.2 Avaya™ serial cable DTE X.21 Cable
Pinouts
Table A.2 X.21 DCE Serial Cable Pinouts
Serial
connector pin Signal name Note Direction DB-15
connector
pin
Drain wire Shield GND P2-1
P1-1
P1-14 TXD+
TXD- Twisted pair #5 -->
--> P2-2
P2-9
P1-8
P1-9 RTS+
RTS- Twisted pair #3 -->
--> P2-3
P2-10
P1-5
P1-18 RXD+
RXD-- Twisted pair #8 <--
<-- P2-4
P2-11
P1-11
P1-10 CTS+
CTS- Twisted pair #2 <--
<-- P2-5
P2-12
P1-4
P1-17 RXC+
RXC- Twisted pair #7 <--
<-- P2-6
P2-13
Not connected P2-14
P2-15
P2-7
P1-22
P1-23 Not connected
8 15
1 9
P1 P2
Avaya™ serial cable DTE X.21
26 13
14 1
CB0314