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Maintenance
4-33160-A2-GB21-50 January 1997
Device Health and Status
Use the Device Health and Status branch to view the
current health and status messages for the DSU/CSU.
Table 4-2 lists these messages in priority order.
To display device health and status,
1. From the top-level menu screen, select Stat.
2. From the Status screen, select DevHS.
F1
Status:
DevHS STest Perf
F2
F3
Alarm/status messages appear on Line 2 of the
LCD in priority order (highest to lowest). The
DSU/CSU is polled for current status every ten
seconds. If the status has changed from the last
poll, the Health and Status screen is updated and
the highest priority message is displayed.
3. Use the scroll keys, if necessary, to scroll
additional device health and status messages onto
the LCD.
F1
Device H/S:
OOF at DTE
F2
F3
The Auto Device Health and Status screen appears
when there is no activity (no keys pressed) on the
active physical interface for five minutes. Only the
highest priority message appears on Line 2 of the
LCD.
F1
Auto Dev H/S
OOF at DTE
F2
F3
Table 4-2
(1 of 2)
Health and Status Messages
Message
Description
LOS at Net A Loss Of Signal condition (175 consecutive zeros) has been detected on the network interface.
The condition is cleared when the density of ones to zeros received is 12.5%.
LOS at DTE A Loss Of Signal condition (175 consecutive zeros) has been detected on the DTE Drop/Insert
(DSX-1) interface. The condition is cleared when the density of ones to zeros received is 12.5%.
OOF at Net An Out Of Frame condition (2 out of 4 frame synchronization bits in error) has been detected on
the network interface. The condition is cleared when a reframe occurs.
OOF at DTE An Out Of Frame condition has been detected on the DTE Drop/Insert (DSX-1) interface. The
condition is cleared when a reframe occurs.
AIS at Net An Alarm Indication Signal (unframed all ones signal) is being received by the network interface.
AIS at DTE An Alarm Indication Signal is being received by the DTE Drop/Insert (DSX-1) interface.
EER at Net An Excessive Error Rate condition has been detected on the network interface (the bit error rate
has exceeded the configured threshold for ESF framing). The condition is cleared when the error
rate falls below the threshold value.
Yellow at Net A Yellow Alarm signal is being received by the network interface.
Yellow at DTE A Yellow Alarm signal is being received by the DTE Drop/Insert (DSX-1) interface.