Table 9 describes the 450-1SR MDA and the 450-1SX MDA front-panel components.

Table 9. 450-1SR / 450-1SX MDA Description

Item

Label

Description

 

 

 

1

Link

Communication link LEDs (green):

 

 

On: Valid communications link.

 

 

Off: The communications link

 

 

connection is bad or there is no

 

 

connection to this port.

 

 

Blinking: The corresponding port is

 

 

management disabled.

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-X SC port connectors.

 

 

 

23

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Nortel Networks Installing Media Dependent Adapters manual 1SR / 450-1SX MDA Description