How many fiber optic cable to connect 3com 5500g swicth to another 5500g switch?

Good day guyz,

I need you help.

I have a planned to add a transceiver which supports single mode and multi mode cable. I want to connect the two switches with the same transceiver. According to the specifications,

Media interfaces : LC
Connector LC :
Fiber type : single mode, multimode

How many LC cables are needed and why?

will I use 2 LC cables for transmitter and receiver or not?

Please help me.

thank you.