CommScope FOSC-350C User manual

Gel-sealed In-line Fiber Optic Closure
Contents 1 General
1.1 Installation instruction description
1.2 Product description
2 Sizing and product kit
Information
2.1 Dimensions
2.2 Kit content
2.3 Additional tray kit
3 Installation conditions
precautions
4 Cable installations
(Floating cable bracket)
1 General
1.1 Installation Instruction description
The installation instruction describes the necessary steps to installthe FOSC-350C.
The installation instruction illustrates the use on loose tube cables. If other cable types (slotted
core or central core) are used, supplementary installation steps have to be made. Contact the
local agent to get the relevant accessories and instructions.
1.2 Product description
The FOSC-350C in-line closure is a gel-sealed fiberoptic splice closuredesigned for cable joint
applicationsin the telecom outsideplant network. The closure has maximum splicing capacity of
192 splices and is suitable for deployment in aerial, underground or direct buried environments.
Sealingis achieved via built-in gel technology, resultingin extremely convenient re-entry and re-
sealing.The closure has four cable ports, two on both sides.
2 Sizing and product kit information
2.1 Dimensions
Cable diameter range in port 8 - 20 mm (8 – 17 mm if using 4x48 tray)
Outer closure dimension 367 x 182 x 106 mm
FOSC-350C
INST A L L A TION INSTRUCTION
TC-2039-IP
Rev A, Apr 2018
www.commscope.com
CY6998-000
Rev. D
5 Cable installation (Fixed cable bracket)
6 Fiber preparation
6.1 When using Tray 24
6.2 When using Tray 48
6.3 When usingTray 12(Thin Tray)
7 Splicing and fiberstorage
8 Closing of the closure
9 Field mounting of the closure
10 Re-opening

2
2.2 Kit content
*Standard kit is listed below, alternative kits and accessories are available.
1. Body and cover
2. Splicing tray with splice holder
3. Cable attachment bracket
4. Strength member lug
5. Transportation tubes
6. Set of sealing blocking rings
7. Gel strip
8. Cable plug
9. Cleaning tissue
10. Installation instruction
11. Fusion splice protectors
12. Tie wraps
2.3 Additional tray kit
2.3.1 Tray kit – Tray 24
1. Splicing tray with splice holder (Using Tray 24)
2. Fusion splice protectors
3. Transportation tubes
4. Tie wraps
2.3.2 Tray kit –Tray 48
1. Splicing tray (Using Tray 48)
2. Fusion splice protectors
3. Transportation tube
4. Tie Wraps
3 Installation conditions precautions
3.1 The closures can be installed at temperature between
-5°C and 45°C.
3.2 Follow the installation instruction steps to ensure the
performance of the closure.
3.3 It is necessary to take precautions and keep the
working space clean to protect the closure sealing materials and
splices.
4 Cable Installation (Floating cable bracket)
4.1 Looped Cable
4.1.1 Make a window cut of 2600mm
4.1.2 Cut the loose tube of the to be spliced fibers in the
middle (1300mm) and continue the installation on 4.3
4.2 Drop cables
4.2.1 Remove the cable sheath over 1300 mm.

3
4.3 Cut the strength member on both jacket ends at a
distance of 45 mm from the cable jacket.
4.5 Install the strength member and the aramid yarn (if
present) into the holding lug and secure the lug to the cable
attachment bracket with the bolt. Assure that the lug lip, the
securing bolt and the hose clamp head are positioned
downwards to the bottom of the closure.
4.6 Terminate and secure the cable attachment bracket to
the cable sheath with the cable hose clamp.
4.7 Protect the cable hose clamp and the termination
with some layers of PVC tape.
4.8 Clean the cable sheath with the cleaning tissue
4.9 Select the appropriate blocking rings according to the
cable outer diameter. It is preferred that the blocking ring is
slightly larger than the cable diameter.
4.10 Cut the selected rings on the mark.
4.11 Insert the cable attachment bracket into the bracket
holding slot as shown.
Note: If a dual strength member is present, cut one of the strength members flush
with the jacket end. Install the remaining strength member into the holding lug. Verify
the proper orientation of the cable: strength member towards the attachment bracket.
4.4
If aramid yarn is present, cut the aramid yarn to a
length of 100 mm. Cut away a part of the aramid yarn and make
a braid with the remaining aramid yarn. Paste a piece of PVC
tape at the end of the braid.

4
4.12 Mark the cable where the blocking rings will be
installed as shown. Install the rings over the cable with
the slit positioned under the cable.
4.13 Wrap gel strip around cable between the two blocking
rings. Press first part of the strip onto the cable to ensure the
strip sticks to the cable firmly. Make sure the strip is wrapped
smoothly without twisting between layers.
4.14 Continue wrapping the strip smoothly until
the area between the two blocking rings is completely filled
with gel and add 1 extra turn of gel. In this case, the
gel will exceed the diameter of the blocking rings.
4.15 At the cable port where the cable will be installed, install
two black tie wraps.
4.16 Position the cable with the pre-installed
cable sealing block into the cable port and insert the cable
attachment bracket into the holding slot as shown.
4.17 Secure the cable with the two black tie wraps.
4.18 In unused ports, a cable plug must be installed.
Wrap the gel strip smoothly between in the two blocking rings
of the cable plug. Wrap the gel until it is flush with the blocking
rings. In this case, the gel may not exceed the height of the
blocking rings.

4.19 Install a cable plug (hole towards outside) in all unused
closure cable ports.
5
5.1
5.2
Cable Installation (Fixed Cable Bracket)
Repeat the step 4.1 – 4.2
Cut the strength member on both sides at a distance
of 30 mm from the cable window cut.
5.3 Mark at 55mm and 90mm from the cable jacket end.
5.4 Repeat installation step 4.9-4.10.Install 2pc ring trees
over the cable.
30mm
5.5 Wrap the cable with gel strip. Continue wrapping the
strip smoothly until the area between the two blocking rings is
completely filled with gel and add 1 extra turn of gel. In this case,
the gel will exceed the diameter of the blocking rings.
5.6 Remove the block when cable OD>16mm.
5.7 Tighten the screw to secure the strength member.
5

5.8 Make sure the ring tree in the slot and secure the
cable.
5.9 Secure the cable with UV-resistant tie wrap
5.9.2 Install a cable plug (hole towards outside) in all unused
closure cable ports.
6
6.1
6.1.1
Fiber preparation
When using Tray 24
In case of a looped cable, coil the loops and store
them in the space in front of the tower of the closure (loops can
be stored around the tower as well).
6.1.2 Remove the loose tubes of the to be spliced fiber
bundles up to 150 mm from the cable jacket (see drawing 6.1.4).
6.1.3 Degrease the fiber bundle. Slide the transportation
tubes over the fibers up to 50 mm from the cable jacket end (see
drawing 6.1.4).
6.1.4 Sketch for tube installation.
6
5.9.1 In unused ports, a cable plug must be installed. Wrap
the gel strip smoothly between in the two blocking rings of the
cable plug. Wrap the gel until it is flush with the blocking rings. In
this case, the gel may not exceed the height of the blocking rings.

7
6.1.5 Route the transportation tubes to the tray entrance.
Always route the tubes around the tray tower before entering the
tray.
6.1.6 Secure the transportation tube at the splice tray
entrance with two tie-wraps.
6.2
6.2.1
When using Tray 48
In case of a looped cable, coil the loops and store
them under the tray, and use tie wraps to tie up the bundle.
6.2.2 Remove the loose tubes up to 100mm from the cable
jacket end.
6.2.3 Degrease the fiber bundle and slide the
transportation tube (length of +/- 230mm) over the fibers until
the transportation tube has an overlap with the tube of 50mm.
6.2.4 Route the transportation tubes to the tray entrance as
shown.
100 mm
50 mm
6.2.5 Secure the transportation tube at the tray entrance
with two tie wraps. For the first tube, use the slots positioned
towards the outside. The end of the tube should be positioned on
the rib indicated with an arrow.

8
6.2.6 A second tube can be routed in the same groove, use
the remaining slots to secure the tube with 2 tie wraps. The
present tie wraps don't need to be removed.
6.2.7 Store fibers on the tray properly.
6.2.8 Remove/Install tray 48 as following shows
6.3
6.3.1
6.3.2
When using Tray 12 (Thin tray)
Same as 6.1.1
Same as 6.1.2
6.3.3 Degrease the fiber bundle. Slide the thicker
transportation tubes over the fibers up to 50 mm from the cable
jacket end and then insert the thinner transportation tube into the
thicker one with overlap 30mm (see drawing 6.3.4).
6.3.4 Sketch for tube installation.
6.3.5 Same as 6.1.5
6.3.6 Insert the thinner transportation tube to the splice tray
entrance directly.
30mm Thinner tube
7
7.1
Splicing and fiber storage
Position the FOSC-350C close to the splicing machine
in a convenient location and secure the closure.
7.2 Slide the heat-shrinkable splice protection over one
fiber and fuse fibers according to local recommendations and
procedures. After the fusion splice is made, install the heat-
shrinkable splice protection (e.g. SMOUV) with an appropriate
heating source. Allow the splice protection to cool down to
ambient temperature.
7.3 After each splice is made, the splice should be stored
in the splice holder in the appropriate position. Do not deform the
splice protector during insertion.

9
7.4 Incoming fibers should be routed first behind the splice
holder before the over-length is coiled into the tray. Route the
fibers through the cross of the tray as shown.
7.5 In case of two or more trays, use tray wedge to keep
the upper trays in upward position during installation on lower
tray.
7.6 After use, the tray wedge can be stored on the tower
underneath the installed trays.
7.7 Put on butterfly tabs and tray lid to secure the fiber if
using 48 trays
7.8 Secure the trays by the Velcro.

10
8Closing of the closure
8.1 Close the cover by closing the latches in the proper
sequence shown in 8.2.
8.2
9
9.1
Field mounting of the closure
Termination on aerial cables. Use the special designed
bracket to secure the closure onto the supporting wire of the
aerial cable. Install the two pieces bracket facing with bowing
outwards to interlock the aerial cable.
9.2 Termination in manholes. Secure the closure to the
manhole frames with bolts in the provided positions on the
bottom part of the closure.
10
10.1
Re-opening
Remove the latches in the reversed order as
described in 8.2.

11

© 2018CommScope, Inc. All rights reserved.
SMOUV and all trademarks identified by ® or ™ are registered trademarks or trademarks, respectively, of CommScope, Inc.
This document is for planning purposes only and is not intended to modify or supplement any specifications or warranties relating to
CommScope products or services.
This product is covered by one ore more U.S. patents or their foreign equivalents. For patents, see:
www.commscope.com/ProductPatent/ProductPatent.aspx.
To find out more about CommScope® products, visit us on the
web at www.commscope.com
For technical assistance, customer service, or to report any
missing/damaged parts, visit us at:
http://www.commscope.com/SupportCenter