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Netopia ISDN Modem User’s Guide
Netopia ISDN Modem LEDs
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.