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

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acecoder

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Jan 17, 2011
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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.
 

zx10guy

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What exact model of 5500G switch do you have? Are these the ones with the 4 SFP ports on it? When you mention tranceiver, are you talking about an external media converter or an SFP you are plugging into the switch?
 

acecoder

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I have 3com 5500G-EI 24-Port. Yes, it has 4SFP ports. The transceiver I mean is that the SFP that is being plug on a switch. Do I need to use one LC connector or 2 LC connector? I think transceiver is the compound word of transmitter and receiver, Am I right?
 

zx10guy

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You need one SFP per switch and a single LC to LC fiber cable. The distance between each switch is going to dictate which type of SFP and fiber cable you need. The cheapest and most common fiber setup is SX tranceivers with multi mode fiber. If you are dealing with large distances, LX tranceivers and single mode fiber would be needed but would cost a lot more.

If you are concerned about redundancy, I would consider getting 4 SFPs and two fiber cables. The connections would be configured in a Etherchannel running LACP. Or at a minimum, let spanning tree handle the selection of active/standby designations.
 
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