DETAIL ENGINEERING REQUIREMENTS Section 9, ATT-TP-76400
AT&T January, 2012
6.1.19 Alternating bay arrangements should be used as required or as space permits except in
offices that contain only one bay. The alternating bay arrangement segregates OSP
terminations and Fiber Optic Transmission (FOT) equipment terminations and ensures an
efficient and short jumper arrangement.
Note: L-T locations shall not mix High Speed (HS) Panels (aka Out-Side Plant
(OSP)/Construction & Engineering (C&E) Panels) with Low Speed (LS) Panels (aka Network
Equipment Panels or Tie Panels) in the same Bay FRAME/FOT except in locations where
space is extremely limited in HUTS, POPS or SMALL OFFICES where there is no alternative.
6.1.20 The FDF shall always utilize the cross-connect methodology. Transport/Switch equipment
shall not be directly terminated on the front access ports of the OSP panels. Transport/Switch
equipment shall be terminated on FOT panels and cross connected to any other panel.
6.2. Satellite Fiber Distributing Frame
6.2.1 When an FDF is required to be placed on a different floor or in a non-contiguous equipment
area from the primary office FDF, it shall be considered a remote or satellite FDF. This
remote or satellite FDF shall be required to be connected back to the primary office FDF via a
fiber optic tie cable.
6.2.2 When Satellite Fiber Distributing Frames are placed, Fiber Protection Systems (FPS) shall be
placed to allow easy access to support the eligible area for each Network Element.
The use of in-house tie cables will be permitted to connect between floors in a large building
in order to minimize the number of cable runs between floors. This will apply to all OC and
Gigabit rates.
6.2.3 In newly constructed 7ft environments, overhead FPS shall be placed between 7’-3” and 8’-
5”.
6.2.4 In pre-existing office environments where the overhead FPS is higher than 8’-5” it is
permissible to continue the FPS growth at the pre-existing office environment level. Examples
would be FPS placed so as to accommodate existing 9ft or 11’-6” office conditions.
6.2.5 Front or rear location of overhead FPS relative to the office equipment will be dependent
upon the terminating parameters of the equipment.
6.3. FDF Applicability
6.3.1 For matters concerning all types of cross connect frames please reference the following
drawings.
ATT-C-01140-E
GEN II Front Load 15" Fiber distribution Frame
ATT-C-01140-E-01 NG3 High Density Fiber Distribution Frame
ATT-C-01140-E-02 NGF Fiber Distribution Frame
ATT-C-01140-E-03 GEN-2 (15") Rear-Load Fiber Distributing Frame
ATT-C-01140-E-04 TE Connectivity GEN-4 (NG4) High Density Fiber Distribution Frame
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(652 paginas)
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