Telect MDC-CB manual 9

Each cassette normally accommodates 24 splices. If all feeder and distribution fiber requires splicing, a total of 18 cassettes are needed to accommodate all 432 subscribers. For the distribution splices, each pod would hold 6 splice cassettes plus one additional cassette on one of the pods for up to 16 feeder splices.

Feeder and distribution strands are spliced to connectorized fiber protected by 3-mm, radius control loose tubing. All tubing from the cassettes to the feeder interface and patch modules cross the door hinge near the top of the cabinet. The tubing is anchored along the compartment partition and guided to SC/APC feeder or distribution adapters:

•The feeder interface near the top, rear-side of the cabinet contains 16 adapters to pass feeder signals to the front compart- ment splitters.

•The distribution adapters are located on 72-port modules (Models MDC-P72N). Fan-out blocks on the Patch Modules are used to accommodate the transition from 3-mm, multi-fiber loose tubing to 900 µm transparent tubes, one for each of the 72 fibers. A total of 6 Patch Modules accommodate the 432 possible subscribers. The SC/APC adapters pass signals to the front compartment for assignment patching.

		Loose Tubing
		From Splice
		Box to
		Rear-Side
		Feeder
Feeders		Adapters
Unassigned		Loose Tubing
Distribution
		From Splice Box
(Parking)
		to Rear-Side
		Distribution
		Adapters
		Fiber Furcated
		From 3-mm
		Multifiber Loose
		Tubing to
Assigned		900-µmSingle
		Fiber Loose
Distribution		Tubing
to Subscriber
		Loose Tubing
		From Feeder
		Cable to Splice
		Box
		Loose Tubing
		From Distribution
		Cable to Splice
Splitter		Box
Bulkhead
Splitter Module	2 mm Jumpers	OSP Feeder	OSP Distribution
		Cable From CO	Cable
Front View With Door Open*		Rear View With Door Open*

* Splitter Modules, Patch Modules, Splice Box, Splice Cassettes, Fan-Out Blocks, and Radius-Control Loose Tubing are Sold Separately.

FRONT COMPARTMENT CROSS CONNECTIONS

Front compartment feeder and cross-connect cabling is the same for cabinets with or without in-cabinet splicing.

Each SC/APC adapter at the top of the cabinet serves to feed the fiber signal to a blue jumper in the front compartment. The blue jumper is routed down through the right portion of the front compartment, then around a couple of spools and an arc. The two spools at the bottom route the blue fiber to a Telect Splitter Module.

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