Multimode trunk cable optical specifications

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The following two tables contain specifications for multimode trunk cable support attachment of FICON® SX-capable, or coupling facility channel-capable devices. Use of trunk fiber having different specifications significantly alters link characteristics. Be sure to use the specification corresponding to the operating wavelength of the channel.

62.5/125-μm multimode trunk cable
Type of fiber Graded index with glass core and cladding
Core diameter1 62.5 ±3.0 μm
Core noncircularity 6% maximum
Cladding diameter2 125 ±3.0 μm
Cladding noncircularity 2% maximum
Core and cladding offset 3μm maximum
Numerical aperture3 0.275 ± 0.015
Minimum modal bandwidth4 500 MHz∙ km at ≤ 2 km at 1300 nm or 160 MHz∙ km at 850 nm 800 MHz∙ km at > 2 km and ≤ 3 km at 1300 nm
Attenuation5 1.0 dB/km at 1300 nm 4.0 dB/km at 850 nm
Notes:
  1. Measured in accordance with EIA 455 FOTP 58, 164, 167 (or equivalent).
  2. Measured in accordance with EIA 455 FOTP 27, 45, 48 (or equivalent).
  3. Measured in accordance with EIA 455 FOTP 47 (or equivalent).
  4. Measured in accordance with EIA 455 FOTP 51 (or equivalent).
  5. This attenuation is a typical value rather than a specification. Use the actual dB/km attenuation value when completing the Calculated Link Loss Work Sheet.
50.0/125-μm multimode trunk cable
Type of fiber Graded index with glass core and cladding
Core diameter 1 50.0 ±3.0 μm
Core noncircularity 6% maximum
Cladding diameter2 125 ±3.0 μm
Cladding noncircularity 2% maximum
Core and cladding offset 3μm maximum
Numerical aperture3 0.200 ± 0.015
Minimum modal bandwidth4 800 MHz• km at ≤ 2 km at 1300 nm or 500 MHz• km at ≤ 1 km at 850 nm
Attenuation5 0.9 dB/km at 1300 nm or 3.0 dB/km at 850 nm
Notes:
  1. Measured in accordance with EIA 455 FOTP 58, 164, 167 (or equivalent).
  2. Measured in accordance with EIA 455 FOTP 27, 45, 48 (or equivalent).
  3. Measured in accordance with EIA 455 FOTP 47 (or equivalent).
  4. Measured in accordance with EIA 455 FOTP 51 (or equivalent).
  5. This attenuation is a typical value rather than a specification. Use the actual dB/km attenuation value when completing the Calculated Link Loss Work Sheet.