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05 Mar 2016

DDM which stands for digital diagnostics monitoring is specified by the industry-standard SFF-8472. Modern optical SFP transceivers can support standard digital diagnostics monitoring (DDM) functions.which is also known as digital optical monitoring (DOM). What makes these transceivers with DDM/DOM function different from the traditional modules? This article will give you the answer.

What is Digital Diagnostic Monitoring (DDM)?

Very often, we can see GLC-LH-SMD, or on the label of modern transceivers. Actually, the ā€œDā€ in GLC-LH-SMD represents the DDM function we are talking about today. When choosing fiber optical transceivers in the market, you may have the option with or without DDM/DOM. At present, most of high-end switches...