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13 Nov 2015

As we all know, 1000BASE-LX transceiver modules can only operate on single-mode fibers. Thus, if we use a Cisco SFP-GE-L 1000BASE-LX/LH SFP module in a multi-mode fiber system, it might pose a problem. When a single-mode signal is launched into a multi-mode fiber, a phenomenon known as differential mode delay (DMD) will appear. This effect can confuse the receiver and produce errors. To solve this problem, a mode conditioning patch cord is needed.

What Is Mode Conditioning Patch Cord?

A mode conditioning patch cord is a duplex multi-mode cord that has a small length of single-mode fiber at the start of the transmission length. The basic principle behind the cord is that you launch your laser into the small section of single-mode...