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CHAPTER 2: PRODUCT DESCRIPTION COMMUNICATIONS MODULES
MULTILINK ML1600 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 ML1600 MGMNT 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
2.2.4 Gigabit (1000 Mbps) Modules
The ML1600 modules provide a GBIC opening for insertion of industry-standard GBICs to
provide Gigabit (Gb) media flexibility. GBIC models are available for both multi-mode
(550 m) and single-mode (10, 25, 40, and 70 km) fiber options, and for Gigabit copper as
well, with new models appearing often.
The 1000 Mb Gigabit fiber-port modules on the ML1600 are normally set (factory default)
to operate in AUTO mode for best fiber distance and performance. The 1000 Mbps SC
fiber-optic module on the Gigabit-SX and Gigabit-LX transceivers are compatible with the
IEEE 802.3z Gigabit standards.