Installing And Configuring The Digital Modem; Front Panel Led Indicator Definitions - 3Com DIGITAL MODEM User Manual

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HAPTER
Table 2-1 Front Panel LED Indicator Definitions
LED Color
Power Yellow
Test Yellow
D-Channel Yellow
B-1 Yellow
or
green
B-2 Yellow
or
green
2: I C
NSTALLING AND
Description
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.
Self-Test/Status. Flashes when the digital 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 Channel/Status. Provides a quick indication of the ISDN
physical network interface and D channel status. 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.
Once the physical and D channel signaling are synchronized,
the LED goes off.
If any physical loss of framing occurs, the LED lights; if there is
a loss of D channel signaling, the LED flashes.
B-1 Channel Indicator. Indicates the activity state of the B-1
channel of the ISDN interface. Green indicates a
circuit-switched data call. Yellow indicates a circuit-switched
voice call. If a call is in a dialing state, the LED flashes. When a
call enters the active state, the appropriate LED color stays lit.
When the call is disconnected, the LED goes off.
B-2 Channel Indicator. Indicates the activity state of the B-2
channel of the ISDN interface. Green indicates a
circuit-switched data call. Yellow indicates a circuit-switched
voice call. If a call is in a dialing state, the LED flashes. When a
call enters the active state, the appropriate LED color stays lit.
When the call is disconnected, the LED goes off.
D
ONFIGURING THE IGITAL
M
ODEM