3Com AccessBuilder 500 User Manual - page 30

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LAN COLLISION

 This LED indicator provides a visual indication that a 

data collision has occurred on the attached LAN. Collisions are a normal 

part of Ethernet operation. The LED flashes to provide a visual indication 

of the number of data collisions that are occurring on the LAN:

■

Slow flash – Low collision activity.

■

Medium flash – Moderate collision activity.

■

Quick flash – High collision activity. Continuous high collision 

activity can indicate that there is too much traffic on your LAN.

LAN RECEIVE

 This LED indicator provides confirmation that data is 

being received from the attached LAN. The LED flashes to provide a 

visual indication of the activity status occurring on the LAN. 

■

Slow flash – Low LAN activity.

■

Medium flash – Moderate LAN activity.

■

Quick flash – High LAN activity.

LAN SEND

 This LED indicator provides confirmation that data is being 

transmitted to the attached LAN. The LED flashes to provide a visual 

indication of the activity status occurring on the LAN. 

■

Slow flash – Low LAN activity.

■

Medium flash – Moderate LAN activity.

■

Quick flash – High LAN activity.

ISDN OK

 This LED indicator provides confirmation of the state of the 

ISDN line. 

■

On – Indicates the AccessBuilder 500 is connected to a working 

ISDN line. Sometimes this LED does not light until the first call 

attempt is made.

■

Off – No ISDN connection present.

ISDN DATA

 This LED indicator provides confirmation that an ISDN call is in 

progress and that the AccessBuilder 500 is connecting to a remote unit.