What is DDM?
DDM means Digital Diagnostic Monitoring, it’s functions are as follows:
1.Monitoring the working temperature
2.Monitoring the working voltage
3.Monitoring the working current
4.Monitoring the TX and RX Power
5.Show the factory information of the optical transceiver
6.Prompt warning/alarm
Through the real-time monitoring the working voltage and working temperature inside the optical transceiver,the system administrator can find some potential problems:
1）If the Vcc voltage is too hgh,will breakdown the CMOS device,if the Vcc voltage is too low,the laser can not work properly.
2）If the receiving power is too high,it will damage the receiving module.
3）If the working temperature is too high,it will accelerate the aging of the device.In addition,through monitoring the received optical power,can control the performance of the circuitry and the remote transmitter.
The application of the digital diagnostic monitoring:
The DDM function of the module can provide a performance monitoring tool for the system,can help the system manage and predict the life of the module, isolate the fault system and verify the compatibility of the module in installation.
The appearance of the optical transceiver with DDM and without DDM is the same,just some differences in the internal circuit. If the optical transceiver without DDM function,once the product has problems,it will not prompt alarm.
In single fiber or dual fiber, If you need optical transceivers with DDM function, Welcome to contact HTF. We will assit you to choose the suitable model.
