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1000BASE-SX MDAs

There are two versions of the 1000BASE-SX (shortwave

gigabit) MDAs:

• The 450-1SR MDA is a single MAC MDA with a

separate redundant Phy (backup Phy port).

• The 450-1SX MDA is a single Phy MDA.

Both versions (Figure 3

) use shortwave 850 nm fiber optic

connectors to connect devices over multimode (550 meter)

fiber optic cable.

3 Activity Port activity LEDs (green):

Blinking: Indicates the network

activity level for the corresponding

port. A high level of network activity

can cause LEDs to appear to be on

continuously.

100BASE-FX SC port connectors.

Table 2. 400-2FX MDA Components

(continued)

Item Label Description

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

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