CommScope FOSC-400BG User manual

1 General information
2 Kit content
3 Installation
4 Closing the closure
Content
1 General information
The installation instruction describes the necessary steps to install the FOSC-400BG. The used optical fiber
cables may consist of a loose tube, slotted core, central core or ribbon construction depending on the type
of FOSC kit. Illustrated are the loose tube construction and fusion splicing protected by heat-shrinkable splice
protectors.
The FOSC-400BG can accommodate up to 6 splice tray organizers. One tray can accommodate up to 24
fiber splices.
The closure is a single-ended design made of a thermoplastic material. The base and dome are sealed with a
clamp and an O-ring system. One oval entry port for looped (uncut) cable management and two round ports
for single cable entry/exit are included in the base. Both heat shrinkable cable seals and multi-out cold gel
seals can be used for cable sealing.
The FOSC-400BG can be installed in direct buried, manholes or aerial locations. The kit contents listed in this
installation instruction reflect the standard contents. Alternative configurations are possible.
FOSC-400BG
INSTALLATION INSTRUCTION
FOSC-400B closure with gel sealing
TC-927-IP
Rev A, Mar 2017
www.commscope.com

• Dome
• Base with tray holder
• Clamp
• O-ring
• Silica gel
• Hook and loop fastener
3 Installation
3.1 Preparation of the closure
3.2 Preparation of the oval port
2 Kit content
3.4.1 Fix the 2 strength member connectors to the metal cable holder
as shown.
3.3 Preparation of the loop cable
Make a window cut of 2.60 m, cut strength member at 45 mm.
3.4 Loop cable mounting
3.1.1 Open and remove the clamp, remove the dome and o-ring.
3.4.2 In case of cables with a soft cable jacket, wrap some foam at
the end of the cable jacket. Install the strength members under the metal
plates and secure the 2 screws. Make sure that the loose tubes are free
to handle! Install the 2 hose clamps over the foam and tighten.
3.2.1 Open the port; the cutting wire can be used. Make sure inner
edges are free of burrs!

3.4.4 Take the first gel part (with trigger) and put the cables in place,
if needed (when large cables) lubricate the cables. Take 2nd gel part
and insert the pins in the corresponding holes at top and bottom. Push
till snap fit (click).
3.4.5 Lubricate the gel parts and insert the assembly.3.4.3 Feed the loop trough the oval port such that the hose clamps
are ± 5 cm in the port.
3.4.6 Move the assembly inwards and fix the metal bracket in the 2
corresponding slits, fix at the bottom side with the split pin.

3.4.8 Take out the loose tube to be terminated and store the uncut
loops in the plastic bag as shown.
3.5.1 Open the port; the cutting wire can be used. Make sure inner
edges are free of burrs.
3.5 Installing drop cable (up to 16 cables cables)
3.4.9 Strip the loose tube at 50mm of the cable jacket.
3.5.2 Before installing the gel seal in the port, install 2 securing
screws!
3.4.10 Determine the correct length of the transportation tube and fix
with 2 tie-wraps to the tray. Knobs at the side! Avoid that the tube is
passing the inner radius of the tray.
3.4.7 Make sure that the plastic hooks are flush with the edge of the
port. Tighten the 4 screws; make sure that after tightening the hooks are
even with the port base.

3.5.4 Install the gel seal in the port and secure the 2 screws, make
sure they grip in the port.
3.5.7 Tighten the trigger till it butts up with the flange. In case of 2
out when only 1 cable is installed, use the dummy rod.
3.5.5 Remove 1.3 m of jacket and cut strength member at 40 mm.
Drop cable preparation
3.5.8 Strip the loose tube at 50 mm from the cable jacket. Determine
the correct length of transportation tube towards the splice tray and fix
with 2 tie-wraps. Knobs at the side!
Avoid that the tube is passing the inner radius of the tray.
3.5.6 Feed the cable(s) trough the gel port. Pull back and secure the
strength member(s) between the 2 metal plates and fix the cable jacket
with the hose clamp as shown.(In case of cables with a soft cable
jacket, wrap some foam at the end of the cable jacket).
3.5.3 Fix the metal bracket as shown.

4.4 Position the dome so that the 2 arrows match.
4.5 Close of with the clamp.
4.1 Install the cover on the tray and bundle the assembly with the
hook and loop fastener as shown.
4. Closing the closure
4.2 Take the silica gel out of the aluminum packaging and place
on top of the tray, attach with some tape.
4.3 Put the o-ring in place; make sure it’s free of dirt!

© 2017 CommScope, Inc. All rights reserved.
Fosc and a ll 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 or 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