Internal Modem Compliancy; Overview - Asus Transformer Book T300FA E-Manual

Internal Modem Compliancy

The ASUS Transformer Book with internal modem model complies with JATE
(Japan), FCC (US, Canada, Korea, Taiwan), and CTR21. The internal modem has
been approved in accordance with Council Decision 98/482/EC for pan-European
single terminal connection to the public switched telephone network (PSTN).
However due to differences between the individual PSTNs provided in different
countries, the approval does not, of itself, give an unconditional assurance of
successful operation on every PSTN network termination point. In the event of
problems you should contact your equipment supplier in the first instance.

Overview

On 4th August 1998 the European Council Decision regarding the CTR 21 has
been published in the Official Journal of the EC. The CTR 21 applies to all non
voice terminal equipment with DTMF-dialling which is intended to be connected
to the analogue PSTN (Public Switched Telephone Network).
CTR 21 (Common Technical Regulation) for the attachment requirements for
connection to the analogue public switched telephone networks of terminal
equipment (excluding terminal equipment supporting the voice telephony
justified case service) in which network addressing, if provided, is by means of
dual tone multi-frequency signalling.
106 ASUS Transformer Book E-Manual