Karel NT30 D, User Manual, Page: 7 / 48

NT30D Technical Reference and User Guide
VI
CAUTION
Since NT Series telephone sets are electronic-based products, the
requirements below should be fulfilled in order to utilize them with desired
performance:
For the proper operation of your telephone, please make sure that
the following criteria are satisfied:
•
It must not be permitted to use the modules and telephones into the places
where the temperature is out of the range of 0 C
o
to +40 C
o
; the relative
humidity is above 80%; exposed to direct sunlight and the modules may be
in contact with water, oil or dust.
•
Anything, which may prevent proper ventilation of the system may be risky
and affect the performance of the system.
•
Your telephone and the module can also be hung on the wall. For this
purpose, please ask the special accessory ‘wall-hanging bracket’ from your
authorized dealer.
•
Please note that you can hang your phone on the wall with one DSS
module at most.
•
If you want to connect more than one DSS to your phone, absolutely ask
the special power adapter from your authorized dealer. It is not
recommended to use any other adapter.
The module and the telephone covers must not be opened by
unauthorized persons in any way.
Precautions must be taken in order to prevent any harmful
substances from leaking or spilling into the module and
telephone in any way.