Multimode (OM3 and OM4)
Outdated OM1 Multimode fibre is rapidly being replaced with OM3 and OM4 Multimode Fibre. In contrast to the technology underpinning Singlemode Fibre, multimode fibre is optical fibre that has been designed to carry multiple light rays (or modes) concurrently. Multimode fibre is best suited across relatively short distances up to 300 metres for OM3 and 500 metres of OM4. Due to cable construction, the light modes will disperse, resulting in a loss of signal quality.
Despite this, multimode fibre is a very popular choice with many organisations due to the cheaper cost of the Switch interface using either Mini GBICs or transceivers. Speeds that OM3/OM4 multimode fibres generate range from 10Mbits/s to 10Gbits. Data Centres utilize 12 core OM3/OM4 fibre links.
Terminations come in LC, SC or ST and are fusion spliced to ensure little to no signal loss