Apparatus
Cases- 621 Series Appartus Cases- 621 Apparatus Series-Co-Location Housing-Buried
Distribution Closures-Buried Distribution Pedestals- Fiber Splice Closures- OSP
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Apparatus
Cases
621
Series Apparatus Cases provide weatherproof mounting facilities for 12, 25 or
50 T1 miniature line repeaters. The housing consists of a molded-plastic card
cage, a molded-fiberglass baseplate, and a stainless steel cover that maintains
pressure-tight integrity. The non-metallic baseplate improves corrosion resistance
and isolates electrical surges due to lightning. The
housing may be mounted vertically on a pole, pedestal, or against a wall in a
manhole.
Each housing is equipped with a mechanism that allows the internal
card cage to tilt approximately 45 degrees. This provides clearance and increases
access to the rear of the card cage for test connection to cable pairs and insertion/
removal of gas tube protectors when the housing is mounted in an area with limited
overhead access. The baseplate may be rotated on the mounting bracket in 90-degree
increments, allowing three different orientations of the card cage. 621
Series T1 Apparatus Cases are available in two configurations, vented with grease-filled
stubs for above-ground installation or pressurized with air-core stubs for manhole
installations. Several optional wiring configurations and cable stub arrangements
may be user-specified.
Durable, corrosion-resistant, stainless steel cover
is easily removed.
A stainless steel V-band assembly firmly clamps the case
cover to the baseplate O-ring seal. No tool is required for removal.
The latch
assembly uses a T-handle on the tightening nut, and is not affected by ice. Tabs
on the latch permit padlocking for security.
Wire-wrap connectors interface
between plug-in units inserted at the front of the card cage and lightning protection
kits installed at the rear.
Plug-in positions for repeaters are numbered from
left to right and bottom to top. Two plug-in positions are designated FF1 and
O/W. The FF1 position accepts the single passive fault filter or the dual amplified
fault filter. The O/W connector accepts the orderwire/fault filter unit (208-type)
which accommodates load coils, build-out capacitors and blocking capacitors.
Retainer brackets prevent plug-in units from disconnecting when the housing is
subjected to severe vibration.
Two cable stubs are secured in the housing
baseplate through cable strain relief grips that screw onto the end of the hollow
conical chambers extending through the housing baseplate, providing an airtight
entrance seal.
Underside of baseplate includes an external Schrader valve
(to allow housing to be easily pressurized and depressurized) or external vent
(for vented units), external orderwire access and ground lug. AC
4306 Series Apparatus Cases provide an economical means of placing Tl/ISDN span
line mini-repeaters, or enhanced electronics in double-width plug-ins, into the
copper network. They
provide protection from the environment for up to six minirepeaters, or up to
three double-width circuit plug-ins with one additional fault locate slot. The
apparatus case is available fully-pressurized with air-core cable stubs, or in
a vented with grease-filled cable stub configuration, to allow mounting in most
underground or above-ground installation sites.
 A sturdy, corrosion-resistant
pole/wall mounting bracket is provided with every apparatus case. The aluminum
card nest has six slots, with three easy-to-remove dividers to convert the card
cage to accommodate three double width plug-ins. The card nest is hinged for access
to the card nest wiring for service, or installing the available surge arrestor
assemblies. Internal and external order wire attach points are standard in every
case.
White enamel, formed aluminum base and dome
Corrosion-resistant
mounting bracket
Long service life, even in corrosive environments
Pressurized
or vented cases
Houses up to six Tl span line mini-repeaters plus one fault
locator.
Houses up to six single-width ISDN repeaters or up to three double-width
ISDN repeaters
Three field-removable dividers to allow up to three double-width
circuit plug-ins
Uni-directional or bi-directional spans, with ten different
wiring options
External orderwire, standard
Totally-grounded system at
installation site
One-stub or two-stub cable wiring options
Air-core or
filled cables
A captive "T" handle and lockable, stainless steel
"V" band clamp seals the domed cover CiAC
3300 Series 3 slot capacity
CiAC 2002 2 slot capacity for interior mounting
CiAC
1000 Series Single slot for interior mounting  
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