Multimode trunk cable optical specifications

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These specifications are for multimode trunk cable support attachment of fibre channel devices:

Table 1. 62.5/125-μm multimode trunk cable
Specification Details
Type of Fiber Graded index with glass core and cladding
Operating wavelength 1300 nm or 850 nm
Core diameter 1 62.5 ± 3.0 μm
Core noncircularity 6% maximum
Cladding diameter 2 125 ± 3.0 μm
Cladding noncircularity 2% maximum
Core and cladding offset 3 μm maximum
Numerical aperture 3 0.275 ± 0.015
Minimum modal bandwidth 4 200 MHz∙km
Attenuation 5 0.5 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, not a specification. Use the actual dB/km attenuation value when completing a Calculated Link Loss Work Sheet. The total link loss, however, cannot exceed specifications in this manual.
Table 2. 50/125-μm multimode trunk cable
Specification Details
Type of Fiber Graded index with glass core and cladding
Operating wavelength 1300 nm or 850 nm
Core diameter 1 50.0 ± 3.0 μm
Core noncircularity 6% maximum
Cladding diameter 2 125 ± 3.0 μm
Cladding noncircularity 2% maximum
Core and cladding offset 3 μm maximum
Numerical aperture 3 0.200 ± 0.015
Minimum modal bandwidth 4 500 MHz∙km
Attenuation 5 0.5 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, not a specification. Use the actual dB/km attenuation value when completing a Calculated Link Loss Work Sheet. The total link loss, however, cannot exceed specifications in this manual.