User's Manual

REV. 0.0
9
3. Software Requirements
Follow the requirements of [1].
4. Regulatory requirements
 Suitable protection devices in compliance with IEC 61000-4-5 class 3 at
least or FCC part 68 shall be provided on the line interfaces, the POTS
splitter/ Low-pass filter, and AC power supply lines to safeguard the unit
against the damage due to transient and lightning surge voltage presented
on the telephone line and AC power supply line. The test results of IEC
61000-4-5 can be temporary degradation or loss of function or
performance but must be self-recoverable and pass operationally within 10
minutes. To fulfill surge protection in easy-installation manner, the ATU-R
must incorporate with chassis grounding mechanism on the exterior of
device.
 The electromagnetic compatibility requirements of the ATU-R shall comply
with class A of EN55022 of the CENELEC (the European Committee for
Electrotechnical Standardization), or class A of 22 of the CISPR
(International Special Committee on Radio Interference of the International
Electrotechnical Commission) or class A of Subpart B of Part 15 of the
FCC (Federal Communications Commission) rules of U.S.A.