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GR-20 Ribbon Separation 5.2.2

GR-20 Ribbon Separation 5.2.2. PFOC Lab Meeting 10/18/2005 Presentation Modified on Feb 14, 2006 Contributed by: Scott Torrey Product Line Manager – Ribbon Cable Corning Cable Systems. Outline. FTTH and ribbon separation Current test procedure Suggested changes.

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GR-20 Ribbon Separation 5.2.2

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  1. GR-20 Ribbon Separation 5.2.2 PFOC Lab Meeting 10/18/2005 Presentation Modified on Feb 14, 2006 Contributed by: Scott Torrey Product Line Manager – Ribbon Cable Corning Cable Systems

  2. Outline • FTTH and ribbon separation • Current test procedure • Suggested changes

  3. FTTH and ribbon separation • Verizon uses ribbon cables in both the feeder and distribution segments of the network • Ribbons are now more frequently accessed to drop single fibers at network access points (NAPs)

  4. Ribbon Separation Test (GR-20 5.2.2) • Section 5.2.2. contains 4 variations of the test • Edge fiber pulled out of ribbon at end • 6-fiber ribbon pulled out of ribbon at end • Edge fiber pulled out of ribbon in mid-span • 6-fiber ribbon pulled out of ribbon at mid-span • Pass/Fail • Force required to perform separation < 4.4 N (1 lbf) • Ribbon matrix easily removable to access individual fibers without damaging coating • Fiber coloring retained on fiber so any 2.5 cm length (1 inch) section identifiable • No coating damage (5x magnification) • Any fiber or sub-ribbon separable by tool or hand > 1 meter

  5. Ribbon Separation Test (GR-20 5.2.2)Edge fiber separation – end sample

  6. Ribbon Separation Test (GR-20 5.2.2)6-fiber ribbon separation – mid-span

  7. Differences exist between test method and field procedure • More than one individual fiber often separated from ribbon • Fibers typically pulled out of edge of ribbon vs. 90-degree angle to long-axis of ribbon • Test requires sample size of two ribbons

  8. Changes and Additions: • 1. All fibers are to be separated from the ribbon, one at a time, using current test set up and equipment. • 2. All fibers to be separated, one at a time, through the edge of the ribbon to reflect typical field practices. • 3. If the cable under evaluation contains six ribbons or less then perform items 1 & 2 on all ribbons. If more than six ribbons then perform items 1 & 2 on six ribbons. • 4. Pull six ribbon samples (less if less than a six ribbon cable) from six different lots, i.e. each sample from a different machine line up, or a different shift, etc. Document pedigree and rationale of each sample. Perform section 5.2.2 with the changes identified in items 1-4.

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