Nortel Networks 350 manual 1000BASE-LX MDAs

Using the BayStack 350 10/100/1000 Series Switch

Table 2. 1000BASE-SX MDA Components

Item Label Description

2 Phy Phy status LEDs (green):

(or)

Phy Select

On: The corresponding Phy port is active.

Off: The corresponding Phy port is in backup mode or there is no connection to this port.

3 Activity Port activity LEDs (green):

Blinking: Indicates network activity level for the corresponding port. A high level of network activity can cause LEDs to appear to be on continuously.

4 1000BASE-FX SC port connectors.

1000BASE-LX MDAs

Warning: This is a Class 1 Laser/LED product. It contains a laser light source that can injure your eyes. Never look into an optical fiber or connector port. Always assume that the fiber optic cable or connector is connected to a laser light source.

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

•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 (Figure B-4) 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 B-10)

B-8 304376-B Rev 00