User's Manual

REV. 0.0

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.