Table of Contents
Advertisement
current, tx power and rx power) can fast locate the fault through Digital Diagnostic function.
Besides, the state of Tx Fault and Rx LOS is important for analyzing the fault.
3. Compatibility verification
Compatibility verification is used to analyze whether the environment of the module accords
the data manual or it is compatible with the corresponding standard, because the module
capability is able to be ensured only in the compatible environment. Sometimes, environment
parameters exceed the data manual or the corresponding standard, it will make the falling of
the module capability that result in the transmission error.
Environment is not compatible with the module are as below:
（1）Voltage exceeds the set range
（2）Rx power is overload or is under the sensitivity of the transceiver
（3）Temperature exceeds the range of the running temperature
16.1.2 DDM Function
DDM descriptions are shown in the following:
1. Show the monitoring information of the transceiver
Administrator is able to know the current working state of the transceiver and find some
potential problems through checking the real-time parameters (including TX power, RX power,
Temperature, Voltage, Bias current) and querying the monitoring information (such as warning,
alarm, real-time state and threshold, and so on). Besides, checking the fault information of the
fiber module helps administrator to fast locate the link fault and saves the restored time.
2. Threshold defined by the user
For real-time parameters (TX power, RX power, Temperature, Voltage, Bias current), there are
fixed thresholds. Because the user's environments are difference, the users is able to define
the threshold (including high alarm, low alarm, high warn, low warn) to flexibly monitor the
working state of the transceiver and find the fault directly.
The thresholds configured by the user and the manufacturer can be shown at the same time.
When the threshold defined by the user is irrational, it will prompt the user and automatically
process alarm or warning according to the default threshold. (the user is able to restore all
thresholds to the default thresholds or restore a threshold to the default threshold)
Threshold rationality: high/low warn should be between high alarm and low alarm and high
threshold should be higher than low threshold, namely, high alarm>= high warn>= low warn>=
low alarm.
For fiber module, verification mode of the receiving power includes inner verification and outer
16-53
Advertisement
Table of Contents
Troubleshooting
