Compatibility Of The Telephone Network And Terrmnal Equrpment; Ren Explanahon; Environmental Requirements - Panasonic DBS 824 Manual

Requirements
Compatibility of the Telephone Network and Terminal Equipment
The Telephone Company sham make changes in its communication facilities
equipment, operations or procedures, where such action is reasonably
required in the operation of its business and is not inconsistent with the rules
and regulations in F C C Part 68 If such changes can be reasonably expected
to render any customer Terminal Equipment incompatible with Telephone
Company communications Facilities, or other wise materially affect its use or
performance, the customer shall be given adequate notice in writing, to allow
the customer an opportunity to maintain uninterrupted service
The REN is useful to determine the quantity of devices your may connect to
your telephone lien and still have all of those device ring when your
telephone number is called In most, but not all areas, the sum of the REN's
of all devices connected to one line should not. exceed five (5 0) To be certain
of the number of devices that you may connect to our line, as determined by
the REN, you should contact your local telephone company to determine the
maximum REN for your calling area

Environmental Requirements

Temperature: The environment should be free from excessive temperatures
in order to avoid component damage Room temperatures should be 32 to
Humidity: The environment should be free from excessive humidity, which
may rust metallic parts and degrade performance Do not install the system
where humidity could condense on its surfaces Relative humidity ranges
should be between 30 and 90 percent.
Ventilation: Adequate ventilation must be provided to allow upward air
circulation through the cabinet grille
Gas and airborne particles: To avoid corrosion or oxidation of electrical
contacts, the environment should be free from airborne particles and
corrosive gas
Electrical noise: The environment should be free from excessive electrical
noise, which could disturb the operation of digital circuits The system should
be located at least 10 ft. (3 m) away from welders, dimmers, or other high-
current machines Phones connected to the system should not be located near
fluorescent lamps, air conditioners washing machines, TVs, or radios
Vibration: The environment should be free from excessive vibration, which
could loosen components
Water Exposure: Because the DBS 824 is an electric device, exposure to
water is dangerous Do not place anything containing water on the system Do
Issued 3/l /95
F (0 to 40" C)
Model Numbers and FCC Information
1-3