Openreach ONT - Option where Openreach installs the equipment

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Multi Dwelling Units (MDUs)
When Openreach is to install the ONT and battery
backup, 3m of cable is required at the splitter
location and 1m (2m if non-connectorised cable)
at the ONT end of the installation.
Each apartment will require a designated
connectorised internal bre cable run in a
continuous fault-free condition from the
designated ONT location within the apartment
to the splitter box within the riser.
At the splitter locations the cable should be
clearly marked with the apartment number and
left safely coiled within the riser.
• Install a ush mounted double back box at the
desired ONT location.
• Install the connectorised bre cable from this
point to the designated riser termination point.
• Ensure there is 1m of spare connectorised bre
cable protruding from the back box. (2m if non-
connectorised cable)
• Push some of the spare cable back into the
wall void and coil the remainder inside the
back box, taking care not to damage the
connectorised end.
• Install blanking plate or brushed face plate to
protect cable ready for provision of ONT nearby.
Option where Openreach installs the equipment
Your FBC will advise of all cable marking/
labelling and will check for this when ‘calling
off’ the work.
IET wiring regulations shall be followed.
External cables can run to a maximum of
2m from the internal building entry point.
From this point onwards, all cables must meet
current re regulations. The alternative is to
house all cables in metallic trunking.
Internal bre cable must not be bent beyond
its minimum radius. If it has been damaged
or there is evidence of kinking it shall be
discarded. Your FBC will advise on replacement
of the cable.
Care shall be taken to avoid stretching cable/
tubes through installation. If cables are
damaged this way you will be required to
replace them.
Bends in bre cable shall be kept to a minimum and
the installation of trunking, cable trays/grids shall
not compromise the bending radii.
Fibre cable containing no metal parts can be run on
shared trays.
Plate cable xings with cable ties must be used to x
bre cable direct to walls to avoid it being damaged.
Under no circumstances shall cable or tubing be
secured or supported to the suspended ceiling
hangers or under oor support legs.
It is the developer’s responsibility to provide
re stopping on completion of the cable/
tubing installation.
Openreach networks must not interfere with or
be interfered with by other services within the
riser or any other shared space. e.g.
• Un-insulated hot water pipes.
• Unscreened mains cables.
• Fluorescent lighting.
• Heavy duty switch gear.
A wayleave may be required from the
building owner prior to installing apparatus
in common areas.
Remember you may need to order copper lines
for commercial properties, for example lift lines.
How to build a fibre network - version 7.1