Single Mode trunk cable optical specifications

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The following specifications for single mode trunk cable support attachment of FICON®-capable, or coupling facility channel-capable devices. Use of trunk fiber having different specifications significantly alters link characteristics. These specifications conform to CCITT recommendation G.652.

Table 1. Single Mode trunk cable optical specifications
Type of fiber Dispersion unshifted
Mode field diameter3 9.0 to 10.0 μm ± 10%
Core concentricity error4 1.0 μm maximum
Cladding diameter4 125 ±2.0 μm
Cladding noncircularity4 2% maximum
Zero dispersion wavelength5 1295-1322 nm
Zero dispersion slope5 0.095 ps/(nm2•km) maximum
Cutoff wavelength (λc)6 1280 nm maximum
Cutoff wavelength (λcc)7 1260 nm maximum
Attenuation above normal1 0.06 dB/km maximum
Attenuation2 0.5 dB/km at 1310 nm
Notes:
  1. Maximum attenuation for wavelengths from 1270 to 1340 nm must not exceed the attenuation at 1310 nm by more than 0.06 dB/km. Typically, this specification can be met by fiber with 1383-nm OH absorption peaks below 2 dB/km.
  2. 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.
  3. Measured in accordance with EIA 455 FOTP 164, 167 (or equivalent).
  4. Measured in accordance with EIA 455 FOTP 45, 48 (or equivalent).
  5. Measured in accordance with EIA 455 FOTP 168 (or equivalent).
  6. Measured in accordance with EIA 455 FOTP 80 (or equivalent).
  7. Measured in accordance with EIA 455 FOTP 170 (or equivalent).