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- Centralized cabling shall support the labeling requirements of TIA/EIA-606.
- In addition, telecommunications room splice and interconnect hardware shall be labeled with unique identifiers on each termination position.
- Field color coding is not used at the interconnect or splice.
- The centralized cross-connect termination positions connected to the telecommunications outlet/connector shall be labeled as a blue field.
- The blue field shall move to the TR for each circuit that is converted to a cross-connection in the TR.
- Centralized cabling shall be implemented to ensure the correct fiber polarity as specified in ANSI/TIA/EIA-568-B.1 (i.e., A-B orientation at the telecommunications outlet/connector and B-A orientation at the centralized cross-connect).

Backbone cabling design requirements :: | 45/55