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2–4 MULTILINK ML1600 ETHERNET COMMUNICATIONS SWITCH – INSTRUCTION MANUAL
COMMUNICATIONS MODULES CHAPTER 2: PRODUCT DESCRIPTION
2.2.2 Six-port Modules
The combo six-port modules are combinations of copper and fiber media, available as four
10/100 switched RJ45 copper ports and two 100 Mb switched multi-mode fiber ST or SC
ports as shown below.
• A5 module: 2 × 10 Mb ST mm fiber and 4 × RJ45 10/100 Mb copper
• A6 module: 2 × 100 Mb ST mm fiber and 4 × RJ45 10/100 Mb copper
• A7 module: 2 × 100 Mb ST sm fiber and 4 × RJ45 10/100 Mb copper
• A8 module: 2 × 100 Mb SC sm fiber (20 km) and 4 × RJ45 10/100 Mb copper
• A9 module: 2 × 100 Mb SC sm fiber (40 km) and 4 × RJ45 10/100 Mb copper
For ports numbering, ports 1, 3, 5, and 7 are copper, ports 2 and 6 are fiber, while ports 4
and 8 are not present.
FIGURE 2–2: Two 10 Mb ST fiber and four RJ45 10/100 Mb copper
The four RJ45 ports operate just like the 8-port copper module, and the two fiber ports
operate at 100 Mbps full-duplex (default). User mode control per port through the ML1600
software is also the same.
On the six-port combo modules, there are four LEDs for each RJ45 port, which indicate
status the same as described in the previous section.
There are three LEDs per fiber port. The Link (LK) LED, when lit, indicates "ready for
operation" on that port, the F/H LED indicates operation in full-duplex mode when ON
(half-duplex when OFF), and the blinking ACT LED indicates receiving activity on the port. A
fiber cable must be connected to the 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. Color-coding on the
panel of the module shows which LEDs belong to which port.
The six-port modules are also available with four RJ45 10/100 copper and two 10 Mb fiber
mm ST ports. For detailed information about 10Mb mm ST fiber half of the module, refer to
the next section.
2.2.3 Eight-port Modules
The ML1600 8-port copper module (A4 module) provides eight 10/100 Mb switched RJ45
ports. The 10/100Mb switched ports normally (as a default setting) are independently n-
way auto-negotiating for operation at 10 or 100 Mb speed in full or half-duplex mode; that
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