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CHAPTER 2: PRODUCT DESCRIPTION PRODUCT DESCRIPTION
MULTILINK ML2400 ETHERNET COMMUNICATIONS SWITCH – INSTRUCTION MANUAL 2–5
is, each independently selects a mode and speed to match the device at the other end of
the twisted pair cable (see Auto-Negotiation (for Fast Ethernet Copper Ports) on page 4–2
for additional details).
FIGURE 2–3: RJ45 10/100 Mb 8-port copper module
On this module, there are four LEDs for each port, two in the connector and two separate.
The LK (Link) LED indicates “ready for operation” on that port when lit. The blinking ACT
(Activity) LED indicates receiving Activity on that port when lit. The 10/100 LED indicates
operation at 100 Mb speed when ON and at 10 Mb speed when OFF (when auto-
negotiation is not disabled). The F/H LED is ON to indicate full-duplex operation and OFF to
indicate half-duplex mode. A twisted pair cable must be connected into an RJ45 port and
the Link (LK) indicator for that port must be ON (indicating there is a powered-up device at
the other end of the cable) in order for a LK LED to provide valid indications of operating
conditions on that port.
Using the ML2400 management software, the user may disable auto-negotiation and fix
the desired operation of each RJ45 port. User may select the 10 or 100 Mb speed and full
or half-duplex mode per-port as per the user requirement.
The combo eight-port modules are combinations of copper and fiber media, available in
the configurations shown below.
•AA module: 4 × 100 Mb LC mm fiber (2 km) and 4 × RJ45 10/100 Mb copper
•AB module: 8 × 100 Mb LC mm fiber (2 km)
•AC module: 4 × 100 Mb LC sm fiber (15 km) and 4 × RJ45 10/100 Mb copper
•AD module: 8 × 100 Mb LC sm fiber (15 km)
•AE module: 2 × 100 Mb LC sm fiber (15 km) and 6 × RJ45 10/100 Mb copper