Nortel Networks 553-3001-211 manual LEI card LED operation, Led

Page 242 of 894 NT5D33 and NT5D34 Lineside E1 Interface cards

The LEDs give status indications on the operations as described in Table 87.

Table 87

LEI card LED operation

LED	Operation
Status	Line card
Red alarm	E1 near end
Yellow alarm	E1 far end
Maint	Maintenance

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 will turn off as soon as either one of the LEI slots have been enabled. No LED operation will be observed when the second card slot is enabled. To properly disable the card, both card slots must be disabled. The LED will not turn on until both card slots have been 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 “Man-Machine E1 maintenance interface software” on page 272 for information on E1 link maintenance.

If one of these alarm conditions is detected, this LED will light. Yellow alarm indication is sent to the far end as long as the near end remains in a red alarm

553-3001-211 Standard 2.00 September 2004