2011
FTTH Deployment Techniques In Existing Infrastructure
Background To Emtelle
• One of the Leading suppliers of Blown Fibre passive network infrastructure solutions with its Fibreflow microducting system
• UK - uPVC Primary Duct (1981)
• Europe - HDPE Duct / Sub Duct (1994)
• Rope in Duct / Cable in Duct (1998)
• Blown Fibre Tube Bundles (1993)
• Installation Equipment / Training (1997)
• Fibre Mini Bundles and Mini Cables (2005 onwards)
Emtelle: innovation is our tradition
MDU – Do It Right First Time
Development of Duct Solutions
Trends / Drivers:
– Evolution of Cable design (getting smaller)
– Future Proofing
– Development of deployment techniques
– Use of existing Ducted Infrastructure
– Use of Existing Overhead Infrastructure
1980s
1 fibre per tube10mm OD - pulled
1990s
8 fibres per tube18mm OD - pulled
2000
12 fibres per tube13mm ODBlow / Pulled
2008
12 fibres per tube7mm ODBlowable
96 fibre
Cable Evolution
2011
24 fibres per tube7.9mm ODBlowable
144 fibre
96 fibre
96 fibre
8 fibre
Deployment Methods In Existing
Infrastructure
Under ground Ducts and Subducts
Sewers & Waterways
Overhead
Current Sub-ducting Trend into Existing Ducts
110mm duct with 4 x 35/30 subducts into a 100mm duct
or 40/50mm Direct Buried Subducts
110mm duct with 7 x 14/10 tubesBenefit to Telco’s :-
• Cheaper ducts
•Takes up less room
•Faster cable installation
Benefit to Operator & Constructor :-
• Smaller products, so easier and
faster to install
•Less machinery required
• Tubes take up less room, so more
opportunities for ‘Over Ducting’
• Smaller tubes are more forgiving
when installing around bends etc,
New Sub-ducting Trend (Day 1)
110mm duct with 24 x 14/10 tube66% Duct Fill
New Sub-ducting Trend (Part Filled)
4x 14/10mm primary tube
installed into 63mm Sub
duct
Duct Install
All primary tubes can be pulled in
at the same time, using 4 small
pull socks attached to a larger
main pull sock
Sewers, Culverts & Tunnels - Pro’s
• Most commonly used in Cities as an
alternative to Trenching or poles
• Quick cable installation
• Reduced damage risk
• Long installation lengths achievable
Sewers, Culverts & Tunnels - Con’s
• Politics
• Cables to be rodent resistant
• Trenches required to link to existing
networks and new customers
• Co-operation required from other
utilities
Water, Waste and Tunnel Systems
Aerial Installation Overhead – Rural and Urban
• Use of Existing Poles from other Operators
• A charge may be made each time a cable is installed
on a pole.
• With Emtelle Blown Fibre, Only 1 Cable is installed on
a pole.
Over Head Solutions
Large 14mm tube for 96 or 144
fibre cable24 x 4mm tubes for drops to homes
and central 8mm tube for 12 fibres
(For PON)
12 x 4mm tubes and a central
14mm tube for main fibre cable
runs
Alternative Lower Cost Deployment Techniques
New Build
Microtrenching
(150mm width)
Microtrenching
(20mm width)Mole Ploughing
Slot Cutting
Different size
machines can
provide various cut
sizes
DBfmf (direct buried filled metal free)
from 3DBfmf up to 7DBfmf 12/10mm
Stages of Cleanfast process
Refilling with a
specific mortarDuct-laying
TrenchingGPR Detection
Final reinstatement
Slot Cutting
• Niche application in certain areas
– Very cost effective
– Low environmental impact compared with
open cut methods
– Shallow depth limitation of 220-250mm
– Fibre provision is enough for small
business applications
– Can be incorporated into existing
underground Infrastructure
– Risk of future damage due to shallow
burial depth
Slot Cutting
Blown Fibre Supply Options
Direct Bury Or
SubDuctingDirect Install Products
Sub-Divisioning of Existing
Ducted NetworksNew Build
Mole Plough / Trenching
New or Existing Build
• 4 fibre - upto 1500m max in typical route
• 500m in this route (up and down 4 times)
(average installation speed was 49m/min)
• 8 & 12 fibre 800 – 1000m
• 72 fibre cable in 10/8 tube, 1000-1500m
• 72 fibre cable in 12/9.4mm tube 2.2km
• 96 fibre cable in 12/9.4mm tube 1000m
The above distances are point to point blows.
Fibre can be centre blown and onward blown
to get 6km splice-less fibre lengths.
How Far can you blow fibre in One point to point blow ?
Thanks for your time
QUESTIONS