87Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760
Appendices ~ Appendix B: Pinouts
Appendix B: PinoutsRS-232 COM DCE port pinout (female)

Pin Number Control Pin Number Control

1 DCD 6 DSR

2 TXD 7 CTS

3 RXD 8 RTS

4 DTR 9 No connection

5 Ground

1
5
6
9
Figure B.1. RS-232 connector
PCXAP 800
DB-9
Male
DB-9
Female
TXD (Pin 2)
RXD (Pin 3)
DTR (Pin 4)
GND (Pin 5)
CTS (Pin 7)
RTS (Pin 8)
TXD (Pin 2)
RXD (Pin 3)
GND (Pin 5)
CTS (Pin 7)
RTS (Pin 8)
Pin 6
Pin 9
Pin 4
Pin 1
Pin 9
Pin 6
Pin 1
XAP 800 Modem
Pin 3Pin 2Pin 3Pin 7DB-9MaleDB-25FemalePin 5Pin 2
AMX
XAP 800
TXD (Pin 2)RXD (Pin 3)GND (Pin 5)RX2 (White)TX2 (Red)GND (Black)DB-9FemalePhoenixConnectorsCTS (Pin 7)RTS (Pin 8)RTS2 (Green)CTS2 (Blue)AMXModem
DB-25
Female
DB-9
Male
TXD (Pin 2)
RXD (Pin 3)
GND (Pin 5)
CTS (Pin 7)
RTS (Pin 8)
DTR (Pin 4)
TXD (Pin 2)
RXD (Pin 3)
RTS (Pin 7)
GND (Pin 6)
RTS (Pin 20)
CTS (Pin 4)
GND (Pin 5)
Figure B.2. XAP 800 to PC RS-232 connections Figure B.3. XAP 800 to Modem RS-232 ConnectionsFigure B.5. Modem to AMX RS-232 ConnectionsFigure B.4. XAP 800 to AMX RS-232 Connections

ClearOne recommends that

all nine pins be connected to

avoid communication errors.

!