This Telecommunications Systems Bulletin  provides guidance regarding the placement of different category cabling delivering both 10GBASE-T and non-10GBASE-T applications in pathways, bundling of cables from different manufacturers or of different construction, and the operation of different applications within the same sheath .

TSB-190 “Guidelines on Shared Pathways and Shared Sheaths” was developed by the TIA TR-42.7 Copper Cabling Subcommittee and published in June, 2011. TSB-190 contains the following guidance:

  • Category 5e, 6, and 6A cabling supporting non 10GBASE-T applications may be placed unbundled or in adjacent bundles within the same pathway with category 6A and TSB-155-A compatible category 6 cabling supporting 10GBASE-T.
  • Category 6A cabling should be used for all new installations intended to support the 10GBASE-T.
  • Compliant category 6A UTP cables from different manufacturers may be placed bundled, unbundled, or in adjacent bundles within the same pathway.
  • Compliant category 6A UTP cables and other category cables may be placed bundled, unbundled, or in adjacent bundles within the same pathway without exceeding the alien crosstalk requirements specified in TIA-568-C.2.

TSB-190 Content

  • Multiple Applications Operating over Different Cabling Categories and Cable Constructions
  • Category 6A UTP Cables from Different Manufacturers
  • Category 6A UTP Cables and Other Category Cables
  • Multiple Applications Operating under the Same Sheath
  • Annexes addressing: on Data Supporting Guidelines for Operating Multiple Applications over Different Cable Categories or Constructions, Data Supporting Guidelines for Using Category 6A Cables from Different Manufacturers, and Data Supporting Guidelines for Using Category 6A UTP cables and Category 6 UTP Cables to Support 10GBASE-T

TSB-190 Sheath Sharing Guidance

Sheath sharing is the deployment of  multiple applications under the same cable sheath.

Issues to consider before sheath sharing strategies can be successfully deployed include:

  • Transmit amplitudes
  • Signal level
  • Robustness of protocols
  • Receiver sensitivity

Applications with different frequencies tend not to interfere with each other.

A 25-pair category 5e binder group can support six 1000BASE-T applications or twelve 100BASE-TX applications.

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