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Appendix
A
Connector Pin Assignments
Table A-1
MODEM Port
Connector Pin Assignments
Pin
Signal
Mnemonic
Direction
(DTE)
1
Shield ground
PGND
2
Transmit data
TXD
Out
3
Receive data
RXD
In
4
Request to send
RTS
Out
5
Clear to send
CTS
In
6
Data set ready
DSR
In
7
Signal ground
SGND
8
Data carrier detect
DCD
In
12
Speed indicator
SPDI
In
15
Receive data - (RS422)
RX-
17
Receive data + (RS422)
RX+
19
Transmit data - (RS422)
TX-
20
Data terminal ready
DTR
Out
23
Speed select
SPDS
Out
25
Transmit data + (RS422)
TX+
Table A-2 AUX Port Connector
Pin
Signal
Mnemonic
Direction
Pin Assignments (DTE)
1
Shield ground
PGND
2
Transmit data
TXD
Out
3
Receive data
RXD
In
4
Request to send
RTS
Out
5
Clear to send
CTS
In
6
Data set. ready
DSR
In
7
Signal ground
SGND
20
Data terminal ready
DTR
Out
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