3Com 7754 - Page 18

18 CHAPTER 1: SWITCH 7750 COMPONENTS
Figure 11 illustrates the front panel and LEDs of the 48-port 10/100BASE-TX FE
module.
Figure 11 Front Panel of the 48-Port 10/100BASE-TX FE module
1 Ethernet port
2 Ethernet port LED
Each 100 Mbps Ethernet port has a green LED, indicating LINK/ACTIVE status.
Table 20 describes the 48-port 10/100BASE-TX FE module LED.
Table 21 describes the specifications of the 48-port 10/100BASE-TX FE module.
See “Electrical Port Connector” on page 78 for an illustration of the RJ-45
connector and MDI/MDI-X pinout details.
Tabl e 20 48-Port 10/100BASE-TX FE module LED
LED Description
LINK/ACT Green — The port is connected.
Off — The port is not connected.
Green flashing — Data is being transmitted or received.
Tabl e 21 Specifications for the 48-Port 10/100BASE-TX FE Module
Specification Description
CPU MPC850
BootROM 512 KB
SDRAM 64 MB
Dimensions (L X W) 366.7 x 340 mm (14.5 x 13.4 in)
Maximum power
consumption
75 W
Connector RJ-45
Number of ports 48
Port transmission
speed
10/100 Mbps half/full duplex
MDI/MDIX auto-sensing
Cables and maximum
transmission distance
Cables are 2 100-ohm Category-5 twisted pairs up to 100 m (300 ft).
Compliance IEEE802.3
IEEE802.3u
IEEE802.3x
IEEE802.3ad
IEEE802.1p
IEEE802.1D
IEEE802.1Q
IEEE802.1X
IEEE802.1s
IEEE802.1w
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