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IndicatorsPassport 4400 Hardware Installation Manual
8-8
ISDN BRI Voice Module
The ISDN BRI Voice Module has three indicators (LEDs) located at the front of
the unit. These indicators are shown and described in the table below.
Figure 8-6. BRI Voice Module Indicators
Table 8-8. BRI Voice Module Indicator Functions
Indicator Function Blinks On Off
B2
Green indicator
associated with
B-channel 2.
When connection
is being
established on
B-channel 2
When B-channel 2
connection is
established
When B-channel2
is not connected
B1
Green indicator
associated with
B-channel 1.
When connection
is being
established on
B-channel 1
When B-channel 1
connection is
established
When B-channel 1
is not connected.
D1
Green indicator
associated with
the D-channel
When port is in an
off-line or
diagnostics state
When port is on-
line and
operational
B2 B1 D1