BT CALLER DISPLAY 2000 User Manual page 22

WARNING
Your Caller Display
2000 is designed to be
operated in a normal
office or domestic
environment only, where
the relative humidity
is no more than 60%.
Environment
Your Caller Display
2000 should be
kept free of dust,
moisture, high
temperature and
vibration, and it
should not be
exposed to direct
sunlight. It should
not be used in
bathrooms or near
water.
Maintaining your
Caller Display 2000
Clean with a soft
cloth.
20
Technical
information
Do not clean with
a wet cloth.
Do not clean with
abrasive materials
or solvents, as
these may damage
the unit.
Do not spray with
aerosol cleaner.
Do not place on
untreated antique
furniture.
How many phones
can you have?
Although you may
have any number
of sockets, it is
important to limit
the number of
phones and other
items connected
in order to ensure
that each phone
will ring.
All telephone
equipment has a
Ringer Equivalence
Number (REN),
which is used to
calculate how many
pieces of equipment
may be connected
to any one
telephone line.
Your Caller Display
2000 has a REN of 0.
Telephones
provided by BT
have a REN of 1,
unless otherwise
stated on the
underside of the
phone. Even where
the number of
telephones has
been limited there
is no guarantee
that different types
of phone on the
same line will ring,
even when the
REN is less than 4.