Recently the weather is very naughty and unpredictable in shenzhen, sometimes it is hot and sunny, sometimes it is rainy, such weather is easy to make people sick.

If a person is sick and goes to the hospital, the doctor will diagnose our condition, The digital diagnostic monitoring function is like a doctor, but the digital diagnostic monitoring function is used to diagnose the working state of the optical module, and it can also monitor the internal working state of the optical module in real time.

The digital diagnostic monitoring function is also the DDM that we often say in the communication industry. The DOM is similar to DDM. The following is a brief introduction to DDM and DOM.

What is DDM?

DDM is Digital Diagnostic Monitoring. DDM has the following features:

u Monitoring module operating temperature

u Monitoring module operating voltage

u Monitoring module operating current

u Monitoring module's transmit and receive optical power

u Display module factory information

u Prompt alarm/warning

The DDM function of the optical module provides a performance monitoring method for the system to help the system manage the life of the prediction module, isolate the system failure, and verify the compatibility of the module in the field installation.

What is DOM?

The DOM is Digital Optical Monitoring. Its function is similar to DDM, it allows you to monitor all aspects of the optical module in real time, such as the transmission and reception of optical transceivers, input and output power, temperature and voltage. The network administrator can check the data to ensure that the optical module is working properly.

Whether the optical module has DDM/DOM function, the appearance is the same, but the internal circuit is somewhat different. If a module doesn't have DDM/DOM functionality, it won't alert you if something goes wrong with the product.

Obviously, optical modules with DDM/DOM are far more popular than optical module without DDM/DOM, so most optical modules meet the standard of SFF-8472 and can support DDM/DOM functions.

Recommended optical modules with DDM/DOM functionality

As an innovative enterprise, ETU-Link always insist on the corporate tenet of providing customers with high-speed optical interconnection products with design innovation and leading solutions.

In order to meet the needs of customers, all the optical modules have DDM which provided by ETU-Link. And module can be perfectly compatible with Cisco, Huawei, H3C and other major brands of equipment, there are a variety of models and styles you can choose.

For more optical module tutorials and solutions, please visit our official website：www.etulinktechnology.com