（規格/プロトコルなど原文掲載）
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.
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 notified networks with which the equipment may have
inter-working difficulties”
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Network Compatibility Declaration
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 notified 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 first
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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This table shows the countries currently under the
CTR21 standard.
Country
Applied
More Testing
Austria
1
Yes
No
Belgium
Yes
No
Czech Republic
No
Not Applicable
Denmark
1
Yes
Yes
Finland
Yes
No
France
Yes
No
Germany
Yes
No
Greece
Yes
No
Hungary
No
Not Applicable
Iceland
Yes
No
Ireland
Yes
No
Italy
Still Pending Still Pending
Israel
No
No
Lichtenstein
Yes
No
Luxemburg
Yes
No
The Netherlands
1
Yes
Yes
Norway
Yes
No
Poland
No
Not Applicable
Portugal
No
Not Applicable
Spain
No
Not Applicable
Sweden
Yes
No
Switzerland
Yes
No
United Kingdom
Yes
No
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This information was copied from CETECOM and is supplied
without liability. For updates to this table, you may visit http://
www.cetecom.de/technologies/ctr_21.html
1 National requirements will apply only if the equipment
may use pulse dialling (manufacturers may state in the
user guide that the equipment is only intended to support
DTMF signalling, which would make any additional testing
superfluous).
In The Netherlands additional testing is required for series
connection and caller ID facilities.
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