Nortel Networks 450 manual Table C-4 describes the 1000BASE-LX MDA components and LEDs

Using the BayStack 450 10/100/1000 Series Switch

There are two 1000BASE-LX (longwave gigabit) MDA models (Figure C-4):

•The 450-1LR MDA is a 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.

•The 450-1LX MDA is a 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 (3 kilometer) or multimode (550 meters) fiber optic cable.

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 C-13)

450-1LR MDA (1-port redundant)

1 2

1000BASE-LX1000BASE-LX

TX RX TX RX

Link

Phy Select

Activity

450-1LR MDA

	4	3
450-1LX MDA	1	2
(single port)

1000BASE-LX

TX RX

Link

Phy

Activity

450-1LX MDA

43

BS45045A

Figure C-4. 1000BASE-LX MDA Front Panels

Table C-4 describes the 1000BASE-LX MDA components and LEDs.

C-10 302401-D Rev 00