Front Compartment Cross Connections ......................................................................................................... 1-5
Features ......................................................................................................................................................... 1-6
Distribution Cable Installation ......................................................................................................................... 4-9
Routing Feeder & Distribution Loose Tubing .................................................................................................4-11
5. Cross Connections
6. Service
Technical Support ........................................................................................................................................... 6-1
In-Warranty Service ........................................................................................................................................ 6-1
Out-Of-Warranty Service ................................................................................................................................ 6-1
MDC-CB Without In-Cabinet Splicing (Rear Corner View)
Cabinet
Base
Telect’s MDC-CB is an indoor/outdoor fiber telecommunication distribution cabinet. The cabinet h ouses T elect’s bulkhead-style Patch Modules to
handle optical signal distributio n between a CO and the network edge. A
single MDC-CB cabinet with up to six Telect Patch Modules can provide
distribution service to 432 homes, offices and/or nodes.
The weather-tight, heavy-gauge, light-weight aluminum cabinet is almond with
two lockable doors — both doors have wind stays. OSP feeder and distribution
cable enter through weather-tight cable clamps at the bottom of the rear compartment:
Illustrations that follow depict open-door views of MDC-CB cabinets with and
without in-cabinet splicing.
Along with the cabinet, Telect includes a footprint template which is also the isolation pad, two cable entrance clamps for two feeder cables between
mm) and 1
ing the door latches. The MDC-CB includes a 6-in. base. A 12-in. Telect base
(Model MDC-R12) is optional.
Physically, the only difference between MDC-CB cabinets with or without splicing is the splice box on the rear door. Feeder and distribution cabling for the two
is, however, quite different.
1
/5 in. (30.5 mm) in diameter, and a 9/32 in. Allen-head key for open-
3
/8 in. (9.6
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Cabling without in-cabinet splicing involves an aerial or below-ground splice box for splicing the distribution and feeder cables to
connectorized cabinet cabling.
•At the cabinet, the OSP distribution cable is clamped at the floor of the rear compartment and then routed along the cabinet’s compartment partition. The connectorized 250 µm strands break out here into subunits/buffers and then connected to
one of the six possible, 72-channel Patch Modules. Each patch module contains SC/APC adapters to interface the distribution fiber in the rear compartment to the cross connections in the front compartment.
•Feeder cable is anchored along the rear side wall where 900 µm fiber breaks out into subunits/buffers and routed to 16
SC/APC interface adapters near the top of the cabinet.
Each SC/APC adapter at the top of the cabinet serves to feed the fiber signal to a blue jumper in the front compartment, shown in the
preceding illustration. The blue jumper is routed down through the right portion of t he 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.
Up to 18, 1x4, 1x8, 1x16, or 1x32 Telect Splitter Modules can be installed in the splitter bulkhead at the bottom of the front compartment. Each splitter module consists of the splitter, one blue “input” jumper, and either 4, 8, 16, or 32 yellow “output” jumpers. All are
2 mm jumpers, 2.1 m in length.
Splitter module installation and all of the distribution changes occur in this front compartment:
•Unassigned jumpers are routed via spools and arcs to a parking station for later subscriber assignment.
•Assigned jumpers are routed via the spools and arcs to the front of the SC/APC adapters in the front of the patch modules
for cross connection to the distribution fiber connected to the rear of the patch modules.
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Each of the six possible patch modules (Model MDC-P72N) features 72 SC/APC cross-connect adapters for a total of 432 possible
4-in. Conduits
Two Cable Entrance Clamps
Are Included With Cabinet
To Accommodate
Two Feeder Cables*
Concrete Pad
One Cable Entrance Clamp
For a Distribution Cable*
Is Included With The
Patch Module
* Cable Entrance Clamps Accommodate
Cable Between 3/8 in. & 1-1/5 in.
In Dia. Additional clamps
Anchors & Conduit Are
Not Included With Cabinet.
Rear of Patch Module
Bar for Grounding
Single-Armored Cable
are available.
subscriber cross connections. Model MDC-P72N-F100D includes the Model MDC-P72N connected to 100 ft (~30.5 m) of Dri-Flex™
OSP cable containing 250 µm fiber furcated to 900 µm loose tubing with an SC/APC connector.
The following illustration shows a deployed cabinet along with a partially cabled rear compartment.
MDC-CB WITH REAR COMPARTMENT IN-CABINET SPLICING
The distribution and feeder OSP enter the cabinet at the floor of the rear compartment. The installer clamps the cable and breaks out
the fiber into 3-mm, radius-control (limited bend) loose tubing. The installer anchors feeder and distribution tubes along the cabinet’s
side wall and rear door.The tubes are guided to the top of the optional splice box located on the door.
The optional in-cabinet Telect Splice Box (Model MDC-SPLC) holds three pods of splice cassettes surrounded by a runway for the
loose tubing.
Telect, Inc. • USA +1.509.926.6000 • Mexico +1.52.33.3836.3700
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Each cassette normally accommodates 24 splices. If all feeder and distribution fiber requires splicing, a total of 18 cassettes are
Feeders
Assigned
Distribution
to Subscriber
Unassigned
Distribution
(Parking)
Splitter
Bulkhead
2 mm Jumpers
Splitter Module
Front View With Door Open
*
Rear View With Door Open
*
Loose Tubing
From Splice
Box to
Rear-Side
Feeder
Adapters
Loose Tubing
From Splice Box
to Rear-Side
Distribution
Adapters
OSP Feeder
Cable From CO
OSP Distribution
Cable
Loose Tubing
From Feeder
Cable to Splice
Box
Loose Tubing
From Distribution
Cable to Splice
Box
Fiber Furcated
From 3-mm
Multifiber Loose
Tubing to
900-
µm Single
Fiber Loose
Tubing
* Splitter Modules, Patch Modules, Splice Box, Splice Cassettes, Fan-Out Blocks, and Radius-Control Loose Tubing are Sold Separately.
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 compartment splitters.
•The distribution adapters are located on 72-port modules (Models MDC-P72N). Fa n-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.
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.
Telect, Inc. • USA +1.509.926.6000 • Mexico +1.52.33.3836.3700
Poland +1.48.713.239.100 • UK +1.44.1489.889500 • www.telect.com
Up to 18, 1x4, 1x8, 1x16, or 1x32 Telect Splitter Modules can be installed in the splitter bulkhead at the bottom of the front compartment. Each splitter module consists of the splitter, one blue “input” jumper, and either 4, 8, 16, or 32 yellow “output” jumpers. All are
2 mm jumpers, 2.1 m in length.
Splitter module installation and all of the distribution changes (patching) occur in this front compartment:
•Unassigned jumpers are routed via spools and arcs to a parking station for later subscriber assignment.
•Assigned jumpers are routed via the spools and arcs to the front of the SC/APC adapters in the front of the patch modules
for cross connection to the distribution fiber connected to the rear of the patch modules.
FEATURES
•Simple cabling scheme. Separate compartments for OSP cable (feeder & distribution at the rear) with splitter growth an d
cross-connections at the front
•Patch module bulkhead swings out into front compartment for convenient adapter and connector inspection and maintenance
•30 mm (min.) bend radius control throughout cabinet & accessories
•Highest splitter density — up to 32 splits per splitter module
•Expandable. Easily add splitter modules as distribution grows
•Popular bulkhead-style modular distribution (up to 6, 72-channel patch modules)
•Bulkhead-style splitter bank for up to 18 Splitter Modules containing 1x4, 1x8, 1x16, or 1x32, premium PLC splitters
•Laser eye protection throughout. All adapters and connectors include dust caps
•Front & rear padlockable doors with wind strays (padlocks not included). Routing guide and designation chart located conveniently on inside of front door.
•Includes grounding bar for armored cable.
BENEFITS
•Low cost — High Fiber Density — Versatility
•Better access — full front and rear doors open wide for simple access and installation
•Simple Site Prep
•Easy Installation. Ideal for both local and remote sites
•Fiber Signals: 16 feeder signals, max.; 432 distribution signals, max.
30.74 [780.9]
67.79 [1721.9]
27.86 [707.7]
18.00 [457.2]
18.94 [481.0]
2.72 [69.1]
51.24 [1301.4]
24.87 [631.7]
24.92 [633.0]
28.31 [719.0]
0.64 [16.2]
•Adapters: SC/APC at cabinet end of fibers
•Cross-Connect Bulkhead Positions: 6, max. Each bulkhead accommodates 72 X-connects (6 x 72 = 432)
•Splitter Module Positions: 18, max. Each accommodates a 1x4, 1x8, 1x16 or 1x32 Telect Splitter Modules with front
access installation and cabling. “Inputs” and “outputs” are 2-mm jumpers, 2.1 m long with SC/APC connectors
•Parking Positions: 72, max., to accommodate unassigned split-
ter “outputs”
•Cabinet Material: 0.125 in, 5052 Aluminum
•Cabinet Finish: Powder-coat almond
Telect, Inc. • USA +1.509.926.6000 • Mexico +1.52.33.3836.3700
Poland +1.48.713.239.100 • UK +1.44.1489.889500 • www.telect.com
WARNING! Fiber ca bles transmit invi sible infrared light . To avoid eye damage or b lindness, never loo k directly
into fibers or connectors.
WARNUNG! Faserkabel übertragen unsichtbares Infrarotlicht. Um eine Schädigung der Augen oder Blindheit
zu vermeiden, schauen Sie nicht direkt in die Fasern oder Stecker.
ADVERTENCIA ! Los cables de fibra transmiten luz láser o infrarroja invisible. Para evitar lesiones oculares o
ceguera, nunca mire directamente a las fibras o conectores.
AVERTISSMENT ! Les câbles à fibres transmettent un rayon laser ou une lumière infrarouge invisible. Pour
éviter toute lésion occulaire ou cécité, ne regardez jamais directement dans les fibres ou dans les
connecteurs.
ALERT! This product must be installed and maintained only by qualified technicians.
ALERT! These instructions presume you have verified that the Telect equipment being inst alled is compatible
with the rest of the system, including power , ground, cir cuit protection, signal char acteristics, equipment from
other vendors, and local codes or ordinances.
PRE-INSTALLATION
Location & Layout —
Use the floor template (isolation pad), or the following illustration, to lay out and construct a re-enforced concrete pad, grating, or
other suitable, stable platform to accommodate the cabinet, anchorage, and cabling. Concrete pads must be at least 6 in. (~150
mm) thick.
Telect does not include an anchor kit or a vault-to-cabinet adapter with the cabinet. Order Telect’s seismic anchor kit (Model
MDC-CBAK) for either indoor or outdoor deployment on concrete. (See “Standard Accessories” Page 7-1.) Model MDC-CBAK
is an expansion-style anchor requiring drilling into the pad; also acceptable are embed L-shaped anchors with ½ in. (M12)
threads, available at appropriate hardware or specialty stores.
Telect, Inc. • USA +1.509.926.6000 • Mexico +1.52.33.3836.3700
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•Telect recommends that the cabinet be mounted with either the 6-in.-high base or optional 12-in.-high base (Models MDCR12) or a suitable vault, along with the isolation pad included with the cabinet. (See “Standard Accessories” Page 7-1.) If
the cabinet is mounted to a concrete pad without a pedestal or vault, the stub-up conduit for the cables must be positioned
accurately and must be either absolutely flush with or countersunk below the top of the pad.
•For a cabinet with a Telect base, the stub-up conduit should not rise above a concrete pad more than about 3 in. (~75 mm)
for a 6-in.-high base and about 6 in. (~150 mm) for a 12-in .-high base. See the following illustration.
•Telect recommends running cables in 4-in. stub-up conduit. Normally, two 4-in. conduits are necessary: one for the feeder
cable(s) and at least one for the distribution cable(s), as shown in the illustration that follows. Prefer to run feeder cable as
close as possible to the grounding bar — regardless if feeder is armored or unarmored.
•Don’t forget to make room for growth. Add additional 4-in. conduit and cap off the end(s) at the edge of or beyond the pad.
•Telect recommends anchors at all four corners. Upper end of anchor bolts must extend between 1¼ in. and 1½ in. above
top of pad, grating, or platform.
•For outdoor deployment, Telect recommends that, in addition to the isolation pad provided with the cabinet, that the customer plan for and provide a suitable water-tight gasket between the bottom of the cabinet and the pad. Use the preceding
illustration to mark and cut a rectangular hole for cable entrance.
Telect, Inc. • USA +1.509.926.6000 • Mexico +1.52.33.3836.3700
Poland +1.48.713.239.100 • UK +1.44.1489.889500 • www.telect.com
Telect is not liable for shipping damage.
Keep the container until you have checked equipment operation. If you experience any kind of problem, call Telect’s Customer Ser-
vice Department. Use the original, undamaged container if you are instructed to return a panel to Telect.
If a shipping container is damaged, keep it for the carrier’s inspection. Notify the carrier and call Telect’s Customer Service Depart-
ment at 1-800-551-4567 or 1-509-926-6000
INSTALLATION PROCEDURE
Please read these instructions carefully before beginning installation. If you need assistance call Technical Support at 888-821-4856
(domestic calls), or 509-921-6161 (Option 2), or eMAIL us at getinfo@telect.com
1.Inspect equipment after unpacking and compare it to the packing list.
Immediately report any shipping damage, defects, or missing parts to
Telect at 1-800-551-4567. Keep all documentation that comes with your
shipment.
2.Remove lifting rings at top of cabinet and then resecure as shown on the
right.
3.Before moving cabinet
is ready: namely,
•If installation includes a vault, make sure vault-to-cabinet adapter is
in place.
, make sure the pad, grating, vault, or other support
•If using Telect’s seismic anchor kit (Model MDC-CBAK), install anchors
lows:
a.Drill an 18 mm (
25
/32-in.) diameter hole, 100 to 115 mm (4¼ to 4½ in.) deep,
at each of the four anchor locations.
b.Clean out holes using a shop vacuum, compressed air, or blow-out bulb.
Clean away debris.
c.Place round washer on rod and then thread torque nut onto the rod. The
washer should touch the top of the metal sleeve.
d.Insert anchor assembly (without the square washer) into hole. Tap anchor
rod down with a hammer until washer touches the concrete.
e.Pre-torque anchoring nuts to approximately 30 ft-lb (~40 N•m) using a ¾ in.
(19 mm) socket or box wrench.
Do not overtighten. Over-tightening will cause the torque nut to prematurely
shear off from the plastic-encased holding nut.
f.Remove torque nut and washer, leaving anchor and stud in place.
g.For exterior installation on a concrete pad, place a water-tight gasket with
cutouts for conduit and anchors on top of pre-installed pad.
4.If installation includes a base (recommended), proceed as follows:
a.Place base over anchor studs, as shown in the following illustration.
, as fol-
Telect, Inc. • USA +1.509.926.6000 • Mexico +1.52.33.3836.3700
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