Nortel Networks Media Dependent Adapters 302403-G - Manual (Page 18)

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1000BASE-X MDAs
The following are the 1000BASE-FX MDAs.
For a complete list of MDAs, see Table 1 on page 4 . For
installation instructions, see “Installing an MDA” on page 24 .
Shortwave Gigabit MDAs
The following 1000BASE-SX MDAs conform to the IEEE
802.3z 1000BASE-SX standard and use shortwave 850 nm fiber
optic connectors to connect devices over multimode (550 m/1805
ft.) fiber optic cable.
• 450-1SR MDA -- single MAC MDA with a separate
redundant Phy (backup Phy port). Only one Phy port can be
active at any time. If the active Phy port fails, the redundant
Phy port automatically becomes the active port.
• 450-1SX MDA -- single PHY MDA.
Figure 7 shows the 450-1SR MDA and the 450-1SX MDA front
panels.
Table 8 1000BASE-FX MDAs
Shortwave gigabit
• 450-1SR MDA, page 17
• 450-1SX MDA, page 17
Longwave gigabit
• 450-1LR MDA, page 20
• 450-1LX MDA, page 20