Cabletron Systems MMAC-Plus 9A000, User Manual

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3-7
Switch Hardware
Table 1.1 describes the RS-232 serial port pinouts that are illustrated in
Figure 3.5.
3.2.2.1.3 Ethernet 10BaseT Port
The Ethernet 10BaseT port on the front panel of the SCP has a standard RJ45
connector. There is a transmit LED to the left of this port and a receive LED to
the right of this port. Tables 1.2 and 1.3 describe the states of the LEDs and
their meanings.
Table 3.1 - RS-232 Serial Port Pinouts
Pin Number
Signal
Mnemonic
Signal Name
1 DCD Data Carrier Detect
2 RXD Receive Data
3 TXD Transmit Data
4 DTR Data Terminal Ready
5 GND Signal Ground
6 DSR Data Set Ready
7 RTS Request to Send
8 CTS Clear to Send
9 Not Used
Table 3.2 - Ethernet 10BaseT Transmit LED Description
LED Color Meaning
red There is a collision on the port.
green The port is transmitting normally.
Table 3.3 - Ethernet 10BaseT Receive LED Description
LED Color Meaning
red The port is failing link integrity.
green The port is receiving normally.