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A.3.1.2
RJ-45 to DB-25 Adapter Crossovers
TABLE A-7
Serial Port (RJ-45 Connector)
Pin
1
2
3
4
5
6
7
8
A.3.2
Serial Port TTYA
The port labeled TTYA accepts a DB-9 connector. Use this port for general purpose serial data
transfers.
signals.
FIGURE A-4
TABLE A-8
Pin
1
2
3
4
RJ-45 to DB-25 Adapter Crossovers
Signal Description
RTS
DTR
TXD
Signal Ground
Signal Ground
RXD
DSR
CTS
Figure A-4
shows the pin numbering of the serial port.
Serial Port (TTYA) Pin Numbering
Serial Port (TTYA) Connector Signals
Signal Description
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
DB-25 Adapter
Pin
Signal Description
5
CTS
6
DSR
3
RXD
7
Signal Ground
7
Signal Ground
2
TXD
20
DTR
4
RTS
Table A-8
Pin
Signal Description
6
Data Set Ready
7
Request to Send
8
Clear to Send
9
Ring Indicate
Appendix A • Signal Pinouts
A.3 Serial Ports
describes the pin
153
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