Hi! This instructional video will walk you
through the installation procedure of a LCP
(Local Convergence Point) Closure. LCP closure
is where our first level splitter is housed.
This is where the feeder cable is branched
out to distribution cable. The fiber closure
that we will be using on this video is a Huawei
product with model SSC2101-HM, which is dome
style heat shrink sealing closure. It is typically
used by both Globe Telecom and PLDT’s FTTH
projects.
The LCP enclosure location is along the 144
core feeder path in either aerial or underground
fed. The feeder cable is spliced through the
LCP closure and take cores out from the 144
and spliced to the level 1 splitter pigtail
which is in our example a 1:4 splitter. The
output fibers from the PLC splitter will then
be spliced to the 72 core distribution cable.
To start, we will open up the end port using
a hacksaw or a blade cutter. Open straight
through port closure end cap. Open drop cable
port end cap. Using the blade cutter, carefully
smooth off the edges. When using sharp objects,
always exercise caution.
Scratch or rub the ports surface with sanding
paper to make the surface rough. The rough
surface will help the shrinkable tube attachment
better and stick firmly.
Strip the feeder cable sheath from the loop
2 meters for mid span openings. Wrap an insulating
tape at the cable sheath ends. Put aluminum
foil provided around the cable to where the
heat shrink will be located. This foil serves
as a protection to the cable when heat is
applied later to seal the port. Insert shrinkable
tube to the cable.
Insert buffer loop to the straight through
cable port. Attach the strengthening member
to the cable retention plate. Tighten screws
to secure cables and strengthening member
in place. Retain a strengthening member allowance
1 inch from the end of the sheath so that
the buffer tubes won’t get stressed. Trim
excess strengthening member.
Cable opening for splicing shall be limited
to 1.0 meter for end cable opening of the
distribution cable. Put the shrinkable tube
first before inserting the stripped branching
72 core cable on to the drop port. This closure
has 5 drop port out. It has 144 core splicing
capacity. Do the same for the branching cable;
attach the strengthening member to the cable
retention plate. Tighten screws to secure
cables and strengthening member in place.
Place shrinkable tubes on to the ports. Put
separator in between the straight through
cable. Start heating the shrinkable tubes
using blue torch. Don’t move the torch closely
or directly to the shrinkable tube as it might
burn the tube completely. The shrinkable tube
should be smooth from heating and follows
the shape of the cable port. Make sure that
the heat sealing gel comes out from the shrinkable
tube to ensure sealing integrity.
Separate orange buffer tube from the main
or feeder cable. According to Globe Telecom’s
guideline and practice, fiber core 13-24 is
assigned for LCPs which is the orange buffer
tube while Fiber core 1-12, 25-72 is assigned
for NAPs which are the rest of buffer tubes.
Pass through loose tubes shall be stored on
the closure cable rack.
Separate blue buffer tube from the distribution
cable. This buffer is for the NAP. Loop remaining
buffer tubes at the back of splicing tray
storage. Secure with cable ties. Cut excess
tie wraps.
Strip buffer tube blue. This buffer comes
from the 72 core distribution cable.
Strip orange buffer tube using a fiber cable
slitter. This buffer comes from the 144 core
feeder cable. Carefully take Fiber 13 out
from the buffer and idle un-spliced fibers
shall not be cut and shall be stored in the
splice tray.
Insert buffer tube hose to the orange buffer
tube from the 144 core feeder cable. Insert
buffer tube hose to the blue buffer tube from
the 72 core distribution cable.
Secure buffer tube with tie wraps. Use black
tie wrap to indicate feeder cable buffer location
and white tie wraps for the distribution cable
buffer.
Groom excess fiber to the splicing tray loop
holder.
Place 1:4 PLC splitter on to its assigned
tray. Separate splitter out pigtails from
its attachments to the other fiber cores so
that it will easily get spliced to the distribution
cable.
Strip Fiber 13 of the feeder cable. Fiber
13 is the fiber color blue of the buffer orange.
Clean the bare fiber with cotton or tissue
and alcohol. Cut excess fiber core 10mm from
the fiber tube using a fiber cleaver. Set
the cleaved fiber to the splicing machine.
Insert splice sleeve to the splitter pigtail.
Strip the tube and remove covering. Clean
the bare fiber with tissue and alcohol. Cut
excess fiber core 10mm from the fiber tube
using a fiber cleaver. Set the pigtail core
to the splicing machine. Operate and initiate
fiber jointing to the splicing machine. Acceptable
splicing loss is -0.05dB maximum. Move splice
sleeve on to the splice point. Put the spliced
point with sleeve on to the splicing machine
oven. This is to shrink in the splice sleeve
material to the bare fiber. The red light
indicator turns off once the splice sleeve
shrinking is completed.
Do the same process of jointing to 4 core
pigtails out from the splitter and the Fiber
numbers 1 to 4 of the distribution cable.
Insert splice sleeves to the 4 splitter pigtails
and splice. Place spliced fiber with sleeves
to the tray. When grooming the loop make sure
to follow loop diameter of the splicing tray
provided to avoid micro bend loss.
Put the tray cover in place. Secure splice
trays to base with provided Velcro straps.
Position and limit fiber counts in their proper
splice tray as seen on the table. Tray 1 being
the bottom tray.
If the scenario is aerial, mount the LCP closure
on the pole with 2 stainless straps and a
loop holder provision 100mm below the closure.
Provide a 15 meter loop on each LCP location.
Apply maximum 400mm diameter of cable loops.
Flash test dome closure with pressure 5.8
PSI or 40Kpa to ensure that it can withstand
water immersion. Physical test and inspection
is also implemented upon project acceptance.
This ends our video tutorial. I hope you enjoyed
and learned. Thank you for watching.
