Section 9, ATT-TP-76400 DETAIL ENGINEERING REQUIREMENTS
AT&T January, 2012
6.1.5 FDF systems are modular in design and shall serve as centralized termination, test access,
cross-connect points and distribution for all fiber network elements.
6.1.6 The FDF shall be the primary interface and cross-connect point for all Fiber Optic products,
cabling and equipment. The FDF shall be the direct cable cross-connect point for all AT&T
Network Elements to one another.
6.1.7 Interbay LAN connections (typically multimode) may be run NE to NE without the use of a
FDF.
6.1.8 Connectivity from one Network Element to another within the same Network Equipment
footprint shall only be permitted as a permanent arrangement for connectivity of equipment
issues.
6.1.9 Passive devices such as Optical Splitters and WDM technologies shall fit within modules
developed for use in the miscellaneous 12-slot vertical shelf or will be required to be hard-
cabled to an off-site location from the FDF.
6.1.10 Optical Carrier systems that use primary and protect paths for signal transmission shall have
path diversity for cross-connects and cabling within the Carrier Communications Space
beyond the initial Network Equipment lineup in accordance with ATT-002-316-087, Intraoffice
Routing Diversity for the Central Office.
6.1.11 Fiber cabling within a Network Element system using one or multiple bays within the same
footprint may be cabled directly without termination on a FDF.
6.1.12 Fiber provisioning between the Fiber Distribution Frame and Network Equipment within one
Carrier Communications Space floor not separated by a firewall, floor or ceiling shall be
accomplished in either one of the two methods listed below:
A. Fiber patch cords via the Fiber Protection System (FPS).
B. OFNR Cable via dedicated cable rack.
Network Elements placed outside of this area that need to be connected to another area shall
require the use of OFNR cable, not jumpers, to be run and terminated to the FDF.
6.1.13 Single Mode SC-UPC connectors shall be used when terminating on the FDF.
6.1.14 The full cross-connect architecture provided by the Fiber Distributing Frame shall be used in
the AT&T network except as spelled out in Section 9, Sub-section 6.2 of this document or as
directed by other AT&T technical documentation.
6.1.15 Fire-retardant ribbon fiber optic outside plant cables should be pre-terminated on the Outside
Plant (OSP) shelf in the FDF bay and may be spliced to optical OSP facilities either in the
cable vault or in the first manhole, whichever is appropriate.
6.1.16 Outside plant cable shall not exceed 50’ within the building unless enclosed in conduit.
6.1.17 Fiber optic pre-connectorized inter-connect cables from optical transmission and switching
equipment shall be terminated on a Fiber Optic Termination (FOT) shelf in an FDF bay.
6.1.18 The FOT and OSP terminations shall be cross-connected via cross connect fiber optic
jumpers at the time a service request is initiated.
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(652 paginas)
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