T1/E1 Status Indicators - Nortel Passport 4400 Series Hardware Installation Manual

Indicators

T1/E1 Status Indicators

Indicator Function
AT System Status
XA DSX-1 interface
alarm status
XT DSX-1 interface
test status
DA, DT, D1 Reserved for
and D2 future use
T1/E1 indicator
Power Off
Reset
RAM Test
Boot Checksum Test
Download Required
Downloading Code
TAM Initialization
Table 11-3. T1 Operational States
State
Off
Green
Flashing green
Off
Flashing red
Flashing amber
Flashing green
Green
Red
Off
Table 11-4. T1/E1 Status Indicator Initialization States
D2 D1 DT/2T
Off Off Off
Green Green Red
Off Off Off
Off Off Off
Off Off Red
Off Off Off
Off Off Off
Passport 4400 Hardware Installation Manual
Status
Initialization mode – see Table 11-4.
Operational mode – see Table 11-4.
Download active.
Interface not active.
Red alarm – sync loss (an out of frame condition)
that lasts for more than 2.5 seconds.
Yellow alarm – received from the remote node that
is currently in the red alarm state.
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.
Interface operational.
Test in progress – XA shows test status.
No test.
DA/2A XT/1T
Off Off
Off Red
Red Off
Off Red
Off Off
Off Off
Off Off
XA/1A AT
Off Off
Off Green
Off Off
Off Off
Off Off
Off FlashGrn
Red Off
11-3