Om4 Optical Cable Testing Standards
In August of 2009, TIA/EIA approved and released 492AAAD, which defines the performance criteria for this grade of optical fiber. ISP = Inside plant, OSP = Outside plant (Applicable to TIA only) While OM5 has similar performance values to OM4 for Insertion Loss and Distances supported, it has a special characteristic that differentiates it. The fiber optic link attenuation is tested using an optical loss test set (OLTS) or a light source and power meter (LSPM) Figure 1). This article explains the core differences between OS1 and OS2 singlemode fibers, as well as OM3, OM4, and OM5 multimode fibers—to help OEM. All categories support transmission of light at 850 and 1300nm, but are diferent in terms of modal band-width, maximum supported length and other opti al transmission parameters.
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