Optical Bypass Connector Pin Assignments; Serial Port Pin Assignments - 3Com CoreBuilder 2500 Getting Started Manual

Table B-3 10BASE-T (RJ-45) Pin Assignments
Pin No. Signal
1 TX +
2 TX –
3 RX +
4 Not Used
5 Not Used
6 RX –
7 Not used
8 Not used

Optical Bypass Connector Pin Assignments

Table B-4 provides the pin assignments for the
optical bypass switch connector on the FDDI DAS
MIC module.
Table B-4 Optical Bypass Switch Connector Pin Assignments
Pin No. Signal
1 +5 Volts
2 +5 Volts
3 Control signal
4 Control signal
5
6
Description
Transmit +
Transmit –
Receive +
Receive –
Description
Multimode Fiber
High: Bypass mode
Low: Insert mode
Multimode Fiber
High: Bypass mode
Low: Insert mode
Signal ground
Signal ground
Optical Bypass Connector Pin Assignments

Serial Port Pin Assignments

The following tables show the pin assignments for
the system processor serial ports.
Table B-5 Modem Port Pin Assignments
Pin No. Signal Description
1 DCD Data carrier detect
2 RxD Received data
3 TxD Transmitted data
4 DTR Data terminal ready
5 Signal ground
6 Not used
7 RTS Request to send
8 CTS Clear to send
9 Not used
Table B-6 Terminal Port Pin Assignments
Pin Signal Description
No.
1 Not used
2 RxD Received data
3 TxD Transmitted data
4 Not used
5 Signal ground
6 Not used
7 Not used
8 Not used
9 Not used
B-3