CommScope FOSC-450A Manuel utilisateur

1 Introduction

2 General

2.1 Kit content

2.2 Tools

2.3 Accessories

2.4 Port capacity

3 Closure preparation

4 Cable installation

4.1 Looped cable preparation

4.2 Drop cable preparation

4.3 Cable + strength member termination

4.4 Tube routing

5 Installation of the gel block

6 Fiber routing on the trays

7 Shield continuity

8 Capacity of baskets

9 Closing the closure

10 Important steps

Content

1 Introduction

The FOSC-450 is an environmentally sealed enclosure for the fiber management system that provides the function

of splicing in the external network.

The closure is a single ended design made of a thermoplastic material. The base and dome are sealed with a

clamp and pre installed O-ring system. For cable sealing, a wrap-around block with 4 ports is used that contains

a pre-installed gel profile. It can be opened and closed repeatedly without the need to replace the gel.

The maximum single fiber splice capacity of the FOSC 450 A closure is 96 stored on four trays (24 splices per

tray).

FOSC-450A

INSTALLATION INSTRUCTION

Fiber optic splice closure

TC-772-IP

Rev A, Mar 2017

www.commscope.com

3.3 Secure the frame in the working position.

• Dome

• Base with O-ring system

• Cable attachment plate with tower, cable strain relief and

trays pre-installed (optional)

• Gel block with trigger

• Clamp

• 2 plugs for unused ports

• Silica gel

• Hook and loop fastener

• Tray wedge

• Hose clamps, felt tape

• Installation instruction

4-way gel block

Lower small ports 2 ports 8 - 22 mm

Upper large ports 2 ports 10 - 28 mm

If both the upper large ports are filled with the maximum cable diameter

(28 mm), the maximum cable diameter in the lower small ports becomes

20 mm.

2.2 Tools

• FACC-TUBE-STRIPPER-02 to strip loose tube

• ¼1/4” Nut driver

• 10 mm Nut driver

3.1 Remove the dome to base clamp. Remove the dome and

O-ring.

2.3 Accessories

• FOSC-A-Trays

• FOSC-A-Shield-Con-Kit Shield continuity wire

• FOSC-450A-MULTI-4/7

• FOSC-450A-3-DROP-KIT

2 General

2.1 Kit content

2.4 Port capacity

3 Closure preparation

3.2 Loosen and turn the two metal latches that secure the frame. Take out

the frame.

Note: if a gel seal is already installed loosen the gel seal by turning the

tail of the seal counter-clockwise until the seal is loose.

4.1.2 Make a window cut of 3 m, cut the strength member at a

distance of 40 mm from the jacket. Remove the central tube at 150 mm

from the jacket.

Note: if the central tube is too stiff to route directly to the basket, strip it

back at 25 mm from the jacket and use a spiral tube to route/protect

the fibers to the basket.

3.4 Cable entrance positions

Main cables are installed in the two lowest and smaller ports (1,2). The

drop cables will be placed in the two larger top positions (3,4).

4.2 Drop cable preparation

Loose buffer tube cable

4.1.1 Make a window cut of 2.2 m. Cut the strength member at a

distance of 40 mm from the jacket.

4 Cable installation

4.1 Looped cable preparation

Loose buffer tube cable

Central core cable

4.2.1 Remove the jacket over a length of 1.2 m , cut the strength

member at a distance of 40 mm from the jacket.

4.2.2 Remove the jacket over a length of 1.5 m, cut the strength

members at a distance of 40 mm from the jacket. Remove the central

tube at 25 mm from the jacket.

Central core cable

2 cables

(no grommet)

3 cables

(grommet)

4 cables

(grommet)

ø each cable 9-11 mm > 7-9 mm 4-7 mm

Modular cable (multi-out)

Basket is necessary for this application

4.2.3 Remove the jacket over a length of 1.5 m, cut the strength

member at a distance of 40 mm from the jacket.

Multi-out with the 4/7 kit

In case of 1 up to 3 cables less in diameter than 7 mm, build up to 4

cables with a rod and use a grommet.

Capacity

4.2.4 Mark the drop cable(s) 40 mm from the jacket. Align the metal

plate with the jacket and wrap it around the cable.

4.2.14 Insert the cable with the metal plate into the middle position of

the port splitter. Line up the end of the port splitter with the mark on the

cable.

Multi-out with the port splitter kit

Capacity: maximum 3 cables

Cable range: from 3 – 6 mm

4.2.5 Flip the gel wings together and press to seal around the middle

cable.

4.2. 6 If required, insert other cable(s) on either side of the port

splitter. Keep gel wings in closed position during insertion of cable(s).

Note: make sure gel wings are closed together after cable insertion.

4.2.7 Bundle the cables with vinyl tape on both sides of the port splitter.

Note: in case of central core (uni-tube) cable, remove the core at

150 mm leaving from the jacket.

4.3.1 Secure the strength member into the strength member

attachment.

4.3 Cable and strength member termination

Loose tube and central core

4.3.3 Insert strength member bracket into the slot in the frame. Top

picture shows main cable ports (1,2). Bottom picture shows the drop

cable ports (3,4).

4.3.4 Place the cable(s) between the cable retention brackets. Secure

the cable(s) with the supplied hose clamp(s)

Note: the head of the hose clamp has to be positioned on top of the

cable retention bracket. Otherwise it might interfere with the base when

assembled.

4.3.2 Insert the cable assembly through the FOSC 450 closure base

and position it into the designated port.

4.3.5 Secure the strength member(s) into the strength member

attachment.

4.3.6 Insert the drop cable assembly through the FOSC 450 closure

base and position it into the designated port.

4.3.7 Position the teeth of the cable retention brackets onto the

grommet.

4.3.8 Install the hose clamp around the cable retention brackets.

Note: the head of the hose clamp has to be positioned on top of the

cable retention bracket. Otherwise it might interfere with the base when

assembled.

Modular cable (multi-out)

Multi-out with the 4/7 kit

Multi-out with the port splitter kit

4.3.9 Attach the strength member bracket to the cables. Wrap two

complete layers of felt wrap around the cable(s) at the jacket end.

4.3.10 Insert the drop cable assembly through the FOSC 450 closure

base and position it into the designated port.

4.3.11 Position the teeth of the cable retention brackets onto the felt

wrap and secure with the hose clamp.

Note: the head of the hose clamp has to be positioned on top of the

cable retention bracket. Otherwise it might interfere with the base when

assembled.

4.4 Tube routing

Note: begin splicing on the bottom tray (closest to the metal slack

basket), other empty trays can be removed until needed.

Loose Buffer Tube (loop or single drop)

4.4.2 Slide the appropriate transportation tube over the loose tube

and route to the tray. Mark at 15 mm from the tray edge. Remove the

tube excess from the mark and secure to the tray with tie-wraps.

4.4.1 In case of a loop, select the appropriate loose tube and cut in

the middle. Strip the loose tube at 40 mm from the jacket.

4.4.3 The uncut loops can be stored in the basket if available or in a

plastic bag. Secure the loops with tie-wraps.

Note: in case of modular cables(multi-out): Store the uncut loops on top

of the loose tubes that are passing thru the basket. See section 8 for

loop capacity in the basket.

Central tube (loop)

4.4.4 Route the central tube directly to the basket and secure with tie-

wraps.

4.4.5 In case the tube is too stiff to route directly:

- cut the central tube back to 25mm;

- install spiral tubes over the tube and route to the basket;

- wrap some foam around the spiral tube underneath the tiwraps and

secure to the basket.

4.4.8 Store the uncut bare fibers into the basket and keep in place

with tie-wraps.

Note: do not tighten the tie-wraps onto the fibers.4.4.6 Cut the appropriate fibers and route them through a

transportation tube to the tray.

4.4.7 Secure the transportation tube to the tray with tie-wraps.

Note: if necessary mark and remove the tube excess. The tube is 15 mm

onto the tray and has to make a smooth bend around the tray tower.

Central core Tube (single drop)

4.4.9 Slide the appropriate transportation tube/spiral tube over the

central core (uni-tube) and route it to the basket.

4.4.10 Secure the tube/spiral to the basket with tie-wraps.

Note: when spiral is used, put some foam on the spiral underneath the

tie-wraps.

4.4.11 Route the fibers to the appropriate trays through transportation

tubes.

4.4.12 Secure the transportation tubes to the tray with tie-wraps.

Note: if necessary mark and remove the tube excess. The tube is 15 mm

onto the tray and has to make a smooth bend around the tray tower.

4.4.16 Secure the transportation tube and loose tubes to the basket

with tie-wraps.

Note: wrap some foam around the loose tubes underneath the tie-

wraps.

4.4.17 In case the loose buffer tubes are not kink sensitive, they can

be routed onto the tray following the above shown path. Wrap tape

around the tube(s) before securing to the tray.

4.4.15 Secure one end of the tube to the tray and route the

transportation tube to the basket.

Note: make sure the tube makes a smooth bend around the tray tower.

4.4.13 Strip the loose tube at 450 mm from the jacket.

4.4.14 Select the appropriate size of transportation tube and cut to

300 mm long.

Modular cable (multi-out)

Loose buffer tube

5.2 Position the gel block with the hinge facing the right. Small

ports onto main cables, larger ports onto drop cables.

5.3 Install the gel seal around the cables. Snap both halves of the

gel seal together.

5.4 Slide the base up and over the gel seal. The arrow on the base

has to be aligned with the arrow-looking slot of the frame.

5 Installation of the gel block

5.1 Make sure the gel seal is not already compressed. Turn the

“tail” of the gel seal counter clockwise to ensure that the seal is in the

un-compressed position. Squeeze the gel seal to unlatch and open each

half one at a time.

Modular cable (multi-out)

Central core tube

4.4.18 Secure the central core (150 mm long) to the basket with tie-

wraps.

Note: if present, remove the looped fibers out of the basket.

4.4.19 Route the fibers through the transportation tubes to the

appropriate tray(s).

Note: make sure the tubes make smooth bends around the tray tower.

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