7. Monitoring and Troubleshooting
3160-A2-GB24-10 March 2001 7-5
Table 7-2. Device Health and Status Messages (1 of 2)
Message Description
AIS at DTE An Alarm Indication Signal is being received by the DTE Drop/Insert
(DSX-1) interface.
AIS at Network An Alarm Indication Signal (unframed all ones signal) is being
received by the network interface.
DevFail

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An internal error has been detected by the operating software. An
8-digit code appears for use by service personnel. The condition is
cleared by resetting the device.
Download failed A download attempt was interrupted and failed to complete. The
condition is cleared by resetting the device.
EER at Network 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.
EER at Prt
n
The error rate of the received signal has exceeded the configured
threshold for data port Prt
n
(where
n
is the port number). This
condition only occurs if the synchronous data port’s Embedded Data
Link (EDL) is enabled. The condition is cleared when the error rate
falls below the synchronous data port’s configured threshold value.
Ethernet Down There is no electrical activity on the 10BaseT port.
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 is12.5%.
LOS at Network 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%.
Master Clk fail The master clock has failed. Timing for the DSU/CSU is provided by
the internal clock.
Modem
Connected The integral modem is currently connected. This message is only
displayed for standalone DSU/CSUs.
Network COM Link
Down The COM port is configured for Mgmt and the network
communication link is down.
Network Modem
Link Down The Modem port is configured for Mgmt and the modem
communication link is down.
OOF at DTE An Out Of Frame condition has been detected on the DTE
Drop/Insert (DSX-1) interface. The condi tion is cleared when a
reframe occurs.
OOF at Network 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 Prt
n
An Out Of Frame condition has been detected on data por t Prt
n
(where
n
is the port number). This condition only occurs if the
synchronous data port’s Embedded Data Link (EDL) is enabled.
Primary Clock
Failed The primary clock source configured for the DSU/CSU has failed and
timing is being provided by the fallback clock.