3Com TECHD-0000000122 manual DB-9Connector Pinout, Appendix A Connector and Pinout Specifications

Appendix A: Connector and Pinout Specifications

Table A - 1: RJ-45 1000 Base-T Connector Pinouts

Pin Number	Signal Name
6	Twisted Pair 2 negative (TP2-)
7	Twisted Pair 4 positive (TP4+)
8	Twisted Pair 4 negative (TP4-)

.The following table describes the pinout information for a 10/100 RJ-45 connector.

Table A - 2: RJ-45 10/100 Base-T Connector Pinouts

Pin Number	Signal Name
1	Transmit positive
2	Transmit negative
3	Receive positive
4	Unused
5	Unused
6	Receive negative
7	Unused
8	Unused

DB-9 Connector Pinout

The following figure displays a -DB-9 connector. This connector is used in the X505 only.

Figure A - 2: DB-9 Connector

The following table details the pinout information for the DB-9 connector.

Table A - 3: DB-9 Connector Pinouts

Pin Number	Signal Name
1	Data Carrier Detect (DCD)
2	Receive Data (RxD)
3	Transmit Data (TxD)

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X-Series Hardware Installation and Safety Guide V 2.5