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IndicatorsPassport 4400 Hardware Installation Manual
8-4
T1 and E1 Status Indicators
Table 8-3. T1 Operational States
Indicator Function State Status
AT System Status Off Initialization mode – see
Table 8-5.
Green Operational mode
Flashing green Download active.
XA, DA DSX-1 interface
(XA) and DS-1
interface (DA)
alarm status
Off Interface not active.
Flashing red Red alarm – sync loss (an out of
frame condition) that lasts for more
than 2.5 seconds.
Flashing amber Yellow alarm – received from the
remote node that is currently in the
red alarm state.
Flashing green Alarm Indication Signal (AIS) –
Transmitted to the remote end
when the T1 Voice Module is in the
internal digital loopback state.
When received from the remote
end, the T1 Voice Module enters
the AIS alarm state.
Green Interface operational.
XT, DT DSX-1 interface
(XT) and DS-1
interface (DT) test
status
Red Test in progress – XA or DA shows
test status.
Off No test.
D1, D2 Data ports 1 (D1)
and 2 (D2)
Off Not active
Green Connected
Flashing green Loopback mode