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Indicators Passport 4400 Hardware Installation Manual
11-3
T1/E1 Status Indicators
Table 11-3. T1 Operational States
Table 11-4. T1/E1 Status Indicator Initialization States
Indicator Function State Status
AT System Status Off Initialization mode – see Table 11-4.
Green Operational mode – see Table 11-4.
Flashing green Download active.
XA DSX-1 interface
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 Access Module is in the
internal digital loopback state. When received from
the remote end, the T1 Access Module enters the
AIS alarm state.
Green Interface operational.
XT DSX-1 interface
test status
Red Test in progress – XA shows test status.
Off No test.
DA, DT, D1
and D2
Reserved for
future use
T1/E1 indicator D2 D1 DT/2T DA/2A XT/1T XA/1A AT
Power Off Off Off Off Off Off Off Off
Reset Green Green Red Off Red Off Green
RAM Test Off Off Off Red Off Off Off
Boot Checksum Test Off Off Off Off Red Off Off
Download Required Off Off Red Off Off Off Off
Downloading Code Off Off Off Off Off Off FlashGrn
TAM Initialization Off Off Off Off Off Red Off