7-2 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 interface
and D channel status.
■If the physical ISDN interface establishes synchronization and the ISDN
D channel signaling procedures are not properly established, the LED
flashes. Once the physical ISDN interface and D channel signaling are
synchronized, the LED goes off.
■If the physical ISDN interface is not synchronized or is disconnected,
this LED remains lit.
■If the physical interface 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.