Internal modem compliancy (on selected models) – Asus X24E User Manual
Page 81

Notebook PC User Manual
A-15
Internal Modem Compliancy (on
selected models)
The Notebook PC 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 
multifrequency signalling.
