BT RESPONSE 85, User Manual

Page: 30 / 37

29
Technical
information
Environment
Your Response 85
should be kept free of
dust, moisture, high
temperature and
vibration, and should
not be exposed to
direct sunlight. Do not
stand it on carpets or
other surfaces which
generate fibres, or
place it in locations
which prevent the free
flow of air over its
surfaces.
Warning
The apparatus is only
designed to be operated in
a normal office or
domestic environment
where the relative
humidity does not exceed
60%. It should not be used
in bathrooms or near
water.
If the power fails
If the battery warning
light was not lit before
the power was lost, all
information should be
retained for at least
one hour (up to 6
hours for a fresh
alkaline battery)
If the light was on,
data may be lost even
if a back-up battery
was installed.
If no battery was
installed, all
information will be
lost and the Response
85 will power up as
new when power is
restored.
How many phones
can you have?
All items of telephone
equipment have a
Ringer Equivalence
Number (REN), which
is used to calculate
the number of items
that may be connected
to any one telephone
line. Your Response 85
has a REN of 1. Any
other instrument
provided by BT may
be assumed to have a
REN of 1 unless stated
otherwise. A total
REN of 4 is allowed.
(For example: if your
Response 85 is used in
conjunction with three
extension telephones,
each with a REN of 1,
the total REN is 4).
If the total REN of 4
is exceeded, the
telephones may not
ring. With different
telephone types there
is no guarantee of
ringing, even when
the REN is less than 4.