Asus R508CA User's Guide download pdf (Page 97)

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Overview

On 4th August 1998 the European Council Decision regarding the CTR 21

has been published in the O󰮐cial 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

justied case service) in which network addressing, if provided, is by means

of dual tone multifrequency signalling.

Network Compatibility Declaration

Statement to be made by the manufacturer to the Notified Body and

the vendor: “This declaration will indicate the networks with which the

equipment is designed to work and any notied networks with which the

equipment may have inter-working di󰮐culties.”

Statement to be made by the manufacturer to the user: “This declaration will

indicate the networks with which the equipment is designed to work and

any notied networks with which the equipment may have inter-working

difficulties. The manufacturer shall also associate a statement to make it

clear where network compatibility is dependent on physical and software

switch settings. It will also advise the user to contact the vendor if it is

desired to use the equipment on another network.”

Up to now the Notified Body of CETECOM issued several pan-European

approvals using CTR 21. The results are Europe’s rst modems which do not

require regulatory approvals in each individual European country.

Non-Voice Equipment

Answering machines and loud-speaking telephones can be eligible as well

as modems, fax machines, auto-dialers and alarm systems. Equipment in

which the end-to-end quality of speech is controlled by regulations (e.g.

handset telephones and in some countries also cordless telephones) is

excluded.

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Asus R508CA User's Guide Page 97