Avaya Nortel Communication Server 1000 Reference page 198

NT5D33 and NT5D34 Lineside E1 Interface cards
Maint
The STATUS LED indicates if the LEI has successfully passed its self test, and therefore, if it
is functional. When the card is installed, this LED remains lit for two to five seconds as the self-
test runs. If the self-test completes successfully, the LED flashes three times and remains lit.
When the card is configured and enabled in software, the LED goes out. If the LED continually
flashes or remains weakly lit, replace the card.
The STATUS LED indicates the enabled/disabled status of both card slots of the LEI
simultaneously. To properly enable the card, both the motherboard and the daughterboard slots
must be enabled. The STATUS LED turns off as soon as either one of the LEI slots are enabled.
No LED operation is observed when the second card slot is enabled. To properly disable the
card, both card slots must be disabled. The LED does not turn on until both card slots are
disabled.
The RED ALARM LED indicates if the LEI has detected an alarm condition from the E1 link.
Alarm conditions can include such conditions as not receiving a signal, the signal has exceeded
bit error thresholds or frame slip thresholds. See
software on page 222 for information about E1 link maintenance.
If one of these alarm conditions is detected, this LED turns on. Yellow alarm indication is sent
to the far end as long as the near end remains in a red alarm condition. Depending on how the
Man Machine Interface (MMI) is configured, this LED remains lit until one of the following
actions occur:
• If the "Self-Clearing" function is enabled in the MMI, the LED clears the alarm when the
alarm condition is no longer detected. This is the factory default configuration.
• If the "Self-Clearing" function is not enabled or it is subsequently disabled in the MMI, the
LED alarm indication stays lit until the command "Clear Alarm" is typed in the MMI, even
though the carrier automatically returned to service when the alarm condition was no
longer detected.
The YELLOW ALARM LED indicates that the LEI has detected a yellow alarm signal from the
terminal equipment side of the E1 link. See
software on page 222 for information about E1 link maintenance. If the terminal equipment
detects a red alarm condition such as not receiving a signal, or the signal exceeds bit-error
thresholds or frame-slip thresholds, a yellow alarm signal is sent to the LEI, if the terminal
equipment supports this feature. If a yellow alarm signal is detected, the LED turns on.
The MAINT LED indicates if LEI is fully operational because of certain maintenance commands
that are issued through the MMI. See
page 222 for information about E1 link maintenance. If the card detects that tests are being
run or that alarms are disabled through the MMI, the LED lights and remains lit until these
conditions are no longer detected, then it turns off.
198 Circuit Card Reference
LED
Man-Machine E1 maintenance interface software
Comments? infodev@avaya.com
Operation
Maintenance
Man-Machine E1 maintenance interface
Man-Machine E1 maintenance interface
on
July 2011