Telecommunications Backbone and Riser Cables
At the design stage, plans will be made to route the appropriate telephone backbone cable(s) for the building feed(s).
- 10.1.1: Inter-Building Feed – Under most circumstances, the copper (telephone) backbone cable(s) will originate from 110-type terminal blocks in the Telecom Room in Room 18 of the Renne Library basement. If this feed is routed entirely in the campus tunnel system (i.e., no portion is in underground conduit), the cable specified is to be a CMR rated ARRM-type shielded riser cable, with a fire retardant PVC jacket. If this feed is routed, in whole or in part, in underground conduit, the use of an Alpeth shielded air core PIC-type cable is preferred, and shall be discussed with an UIT Communication Wiring representative before the specification is submitted. Due to the distance between the termination point and the tunnel entrance, per Article 800, section 48 of the National Electric Code, unlisted (unrated) cable (e.g. PIC-type) may not be used, unless routed in rigid metal conduit, or transitioned (spliced) to a CMR-type cable near the tunnel entrance.
- 10.1.2: Intra-Building Feed – Backbone telephone cable from the building Entrance Protector location to the telecommunications room(s), if they are in different locations, shall be CMR-rated ARRM-type shielded riser cable, and will be installed in conduit unless cable hooks or cable tray are used, and will be concealed from public spaces. The telephone riser cable will be terminated on Category 3 telephone patch panels, with 2-pair (4-conductor) 6-position jacks. For each set of 25-pair cable binder-groups and 24 patch-panel ports, the 25th cable pair (violet-slate) shall be terminated on the white-orange positions of the 24th patch-panel port. Thus, all 25 pairs of a telephone cable binder-group will be terminated on the patch panel, and the 24th port of each group will be a 4-conductor connection.
When workstation outlets are made active for telephone lines, a telephone patch cord (6-conductor flat silver-satin cross-over cable) will be installed between the telephone patch panel(s) and the appropriate Tyco Electronics station cable patch panel port. Determine the appropriate patch cord length and dress it in the cable manager. The following telephone patch panel is to be used:
|TE 24 Port||557403-1|
At the design stage, selection of the inter-building fiber-optic backbone cable(s) shall be made, and plans will be made to route backbone cable from the fiber optic building entrance termination location to the telecommunications room. Indoor fiber riser cable will be used and installed in conduit, cable tray, or in inner duct in cable hooks in concealed spaces.
A determination will be made as to whether multi-mode or single-mode fiber optic cable, or both, will be used. Fiber optic cable will be terminated and tested before the fiber is put into use. Fiber test results shall be provided to the UIT Communication Wiring group. Riser cable connections will be made to the fiber optic building entrance location equipment, and in the telecommunications room active rack.
For both fiber optic outdoor backbone and riser cabling, Corning brand cable is required. Termination by fusion splice is the preferred method. UIT will specify specific connectors in a project wiring specifications document. Termination in the telecommunications rack shall be in a fiber panel.