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Q. Hi, I'm just looking for some guidance. We have various 100baseT to fibre media converters and I wanted to use two to extend our LAN into a remote office some 80m away. The converters state MM so I was thinking that OM1 cable would surfice. However I'm not sure what difference using OM2 or more would have and if I need it. We use TRENDnet TFC-110MST with ST connectors. Regards, Simon.
A. Thanks for your enquiry. MM is a family of MultiMode cables which includes OM1, OM2, OM3 and OM4. If you are putting in a new cable, I recommend OM2 (best price) and OM3 (future proofed). You may not be thinking of upgrading to 10GbE, but it will be needed one day, and OM1 or OM2 will not support that speed over 80m, but an OM3 will. For a little extra cable cost, you wont have to replace it (ever?). All of these cables work with the same converters.