Unit installation

FCD-E1 Installation and Operation Manual Chapter 6 Troubleshooting and Diagnostics Handling Alarms 6-9
Table 6-3. FCD-E1 Alarm Messages
Terminal Message LCD Message Alarm
Number
Description Corrective Actions Severity Type
AIS LOCAL SYNC LOSS
AIS L S LOSS: X
24 Local loss of frame synchronization
alarm on the specified link, caused by AIS condition
Problem at the equipment connected to the remote end of the link
MAJOR ON/OFF
AIS OCCURED AIS OCCURRED: X
23 AIS is being detected on the link Problem at the equipment connected to the remote
end of the link
MAJOR ON/OFF
ALARM BUFFER OVERFLOW
ALM BUFFER OVF
04 More than 100 alarms entries have
been written in the alarm buffer since the last clear command
Read the messages, and then send the CLR ALM /A (CA) command from the supervision terminal
MINOR ON
BPV ERROR BPV ERROR: X
30 Bipolar violations in the main or
sublink receive signal. Updated once per second
Have the corresponding link checked. Perform the power-up self-test and replace the FCD-E1 if a failure is detected
MINOR ON
BRG FAILURE B.R.G FAIL: X
33 FCD-E1 technical failure (baud rate
generator of the specified user channel failed)
Replace the FCD-E1 MAJOR ON/OFF
CLOCK WAS CHANGED TO FALLBACK
FALLBACK CLK USE
07 FCD-E1 switched to the fallback clock
source, because the master clock source failed
Check the master clock source. A clock source is replaced as a result of failure under the following conditions: 1. ML - fails during local loss of frame
synchronization on the main link
2. CH1 or CH2 - fails when the data channel
equipment is disconnected or inoperative (DTR line not asserted)
3. SL - fails when the local sub loses frame
synchronization
MINOR ON
CLOCK WAS CHANGED TO INTERNAL
INTERNAL CLK USE
08 FCD-E1 switched to the internal clock
source, because both the master and the fallback clock sources failed
1. Check the two clock sources. 2. Perform the power-up self-test and replace the
FCD-E1 if a failure is detected
MINOR ON