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Longwave Gigabit Models
The two 1000BASE-LX (longwave gigabit) MDA models
are:
• 450-1LR 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.
• 450-1LX MDA -- single Phy MDA.
Both models conform to the IEEE 802.3z 1000BASE-LX
standard and use longwave 1300 nm fiber optic connectors
to connect devices over single mode (5 km/3.1 mi) or
multimode (550 m/1805 ft) fiber optic cable.
Figure 8 shows the 450-1LR MDA and the
450-1LX MDA.
Note:
The optical performance of this transceiver
cannot be guaranteed when connected to a multimode
fiber plant without the use of the special offset
SMF/MMF mode conditioning patch cord
(see “1000BASE-LX Multimode Applications”
on page 42).