Normal LED Meanings 125

WAN LEDs The following figure describes the WAN LEDs when an ISDN or a CSU/DSU connection is being used.

WAN

(CSU/DSU)

Line

B1 B2

Link

Act

Connect

Line

Fault

Error

(CSU/DSU) B1 B2

Link

Connect

Fault

The CSU/DSU uses only the B1 LEDs. Lights green when the path is up.

Lights green when an end-to-end connection exists or is in progress.

Lights amber when an error in the frames is detected.

ISDN only

Line

Act

 

Line

Normal operation

Error

(D channel). Lights green when the ISDN line is activated.

(D channel). Lights amber to indicate a loss of signal, such as a disconnected cable.

LAN LEDs The following figure describes the LAN LEDs.

 

L1

L2

Lights green when 100BASE-TX Ethernet is in use.

LAN

 

100mb

L2

Link

Lights green when the path is up.

L1

L2

100mb

Active

Flashes green when a packet is detected on the LAN.

 

Link

Fault

Lights amber when a an error is detected or the self-test

 

 

 

Active

 

has failed.

 

Fault

 

 

Normal operation

 

 

Page 125
Image 125
3Com NETBuilder SI, SuperStack II manual Wan, LAN LEDs The following figure describes the LAN LEDs