Farallon Communications 412 Manual Do Utilizador

The Netopia ISDN Modem’s five LEDs are described in the table 
below.

LED

Color

Description

Power

Green

Power Indicator. Lit when power is on and remains lit as long as power is 
available from the AC wall transformer plugged into the electrical outlet.

Test

Green

Self-Test/Status. Flashes when the ISDN modem is executing its power-up 
self-test or a user-initiated reset. 

■

If the results of the self-test or reset are normal, the LED goes off. 

■

If the result of the self-test is abnormal and a fault is detected, the LED 
remains lit but does not flash.

D

Green

D Channel/Status. Provides information about the physical ISDN inter face 
and D channel status. 

■

If the physical ISDN inter face establishes synchronization and the ISDN 
D channel signaling procedures are not properly established, the LED 
flashes. Once the physical ISDN inter face and D channel signaling are 
synchronized, the LED goes off. 

■

If the physical ISDN inter face is not synchronized or is disconnected, 
this LED remains lit. 

■

If the physical inter face establishes synchronization and the ISDN 
D channel signaling procedures are not properly established, the LED 
flashes. 

B1

Yellow
 or 
green

B-1 Channel Indicator. The activity state of the B-1 channel. Green indicates 
a data call. Yellow indicates an analog (voice) call. 

■

If a call is in a dialing state, the LED flashes. 

■

When a call is active, the LED stays lit. (The color of the LED (green or 
yellow) indicates if the call is a data call or an analog call.)

■

When the call is disconnected, the LED goes off.