Intrabuilding Backbone Cable

Cables that run within one TS or extend between two or more TS’s within a building are called intrabuilding backbone cables.

A unique backbone cable identifier shall be assigned to each backbone cable between two TS’s in one building and it shall have a format of fs1/fs2-n, where:

fs1 = TS identifier for the space containing the termination of one end of the backbone cable

fs2 = TS identifier for the space containing the termination of the other end of the backbone cable

n = one or two alpha-numeric characters identifying a single cable with one end terminated in the TS designated fs1 and the other end terminated in the TS designated fs2

In this format, the TS with the lesser alpha-numeric identifier shall be listed first. All intrabuilding backbone cable identifiers in a single infrastructure should have the same format where possible. The backbone cable identifier shall be marked on each end of the backbone cable within 300 mm (12 in) of the end of the cable jacket.

The backbone cable records shall contain the following information:

backbone cable identifier (primary indexing identifier, e.g., 2A/3A-1)

type of cable (e.g., 600-pair 24 AWG shielded riser cable)

type of connecting hardware, first TS (e.g., 36 568SC duplex adapter panel)

type of connecting hardware, second TS (e.g., 36 568SC duplex adapter panel)

cross-connect table relating each backbone cable pair or optical fiber to other backbone cable pairs or optical fibers or to a horizontal link.

Additional items of information desired by the system owner or operator may be added to each record, such as:

cable length

un-terminated pairs or optical fiber strands

available pairs or optical fiber strands

damaged pairs or optical fiber strands

pathway record

splice record

grounding record

Intrabuilding Backbone Pair or Optical Fiber

A unique intrabuilding backbone pair or optical fiber identifier shall be used to identify each single copper pair or each single optical fiber in a backbone cable between two TS’s in one building, and shall have a format fs1/fs2-n.d, where:

fs1/fs2-n = an intrabuilding backbone cable identifier

d = two to four numeric characters identifying a single copper pair or a single optical fiber

All backbone pair or optical fiber identifiers in a single infrastructure should have the same format where possible. The backbone pair or optical fiber shall be maintained through the Intrabuilding Backbone Cable record.