cost than multimode FO DTS. Single-mode FO DTS will
only be used when the designer determines that large
bandwidth or low attenuation links warrant the
single-mode FO DTS.
**************************************************************************
Conductors shall be single-mode, solid glass waveguides with a nominal core
diameter of 8.3 microns. The fiber shall have a transmission windows
centered at 1310 and 1550 nanometer wavelengths. The numerical aperture
for each optical fiber shall be a minimum of 0.10. The attenuation for
inside cable at 1310 and 1550 nanometers shall be 1.0 dB/Km or less. The
attenuation for outside cable at 1310 and 1550 nanometers shall be 0.5
dB/Km or less. The fibers shall be certified to meet EIA
ANSI/EIA/TIA-455-170.
2.15
CROSS-CONNECTS
2.15.1
Patch Panels
**************************************************************************
NOTE: Show cross-connect or interconnect
configuration on the drawings.
**************************************************************************
Patch panels shall be a complete system of components by a single
manufacturer, and shall provide termination, splice storage, routing,
radius limiting, cable fastening, storage, and cross-connection. Patch
panel connectors and couplers shall be the same type and configuration as
used elsewhere in the system. Patch panels shall be [a 480 mm 19 inch rack
mount type] [wall mounted] [as shown].
2.15.2
Patch Cords
Patch cords shall be cable assemblies consisting of factory
connector-terminated flexible optical fiber cable with connectors of the
same type as used elsewhere in the system. Optical fiber shall be the same
type as used elsewhere in the system. Patch cords shall be complete
assemblies from manufacturer's standard products.
2.16
CABLE CONSTRUCTION
**************************************************************************
NOTE: Either tight-buffer or loose-tube cable
construction can be used. The loose tube
construction is more appropriate where the cable is
subject to thermal expansion. This would include
outdoor aerial and long distance runs over 1 Km
(0.62 mile). In multistory buildings or locations
where the cable is installed vertically and will not
experience significant temperature variations, use
tight-buffer cables.
**************************************************************************
2.16.1
General
The cable shall contain a minimum of two fiber optic fibers for each link
circuit. The number of fibers in each cable shall be [_____] [as shown].
Each fiber shall be protected by a protective tube. Cables shall have a
jacketed strength member, and an exterior jacket. Cable and fiber
SECTION 16768A
Page 26
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