Serial Port Pin Assignments - 3Com CoreBuilder 2500 Getting Started Manual

4-28 C 4: C
HAPTER ABLING

Serial Port Pin Assignments

The following tables show the pin assignments for
the two serial ports. See
port and Table 4-4
assignments.
Table 4-3 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 4-4 Terminal Port Pin Assignments
Pin No. Signal Description
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
Table 4-3 for the modem
for the terminal port pin