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System-level Troubleshooting 365
when the far end equipment enters a Red CFA state. See Red Alarm,
earlier in this section.
Alarms on NBX
Digital Line Cards
The T1 and E1 Digital Line Cards support all of the alarm states and
signals described in “
Alarm Descriptions” on page 364. Two status lights
indicate the status of the T1 and E1 cards:
Table 79 Digital Line Card Status Lights
Status Light Purpose
Nominal On: Indicates that there are no error or alarm conditions.
Flashing: Indicates that a call is active on at least one channel
of the T1 or E1 Digital Line Card.
CF (Carrier Fail) On: Indicates that a Red Alarm state or Blue Alarm state exists
on the card.
To determine which alarm state exists:
1 Log on to NBX NetSet using the administrator login ID and
password.
2 In the NBX NetSet - Main Menu window, click Device
Configuration.
3 Click the Digital Line Cards tab.
4 In the Select Device Type drop-down list, select T1 Span
List or, if you are using an E1 card, select ISDN PRI Span
List.
5 Click Apply.
6 Select the span you want.
7 Click Status. The words Red Alarm or Blue Alarm appear in
the Status field.