. /.WORLD TRADE
ORGANIZATIONG/TBT/Notif.00/511
20 October 2000
(00-4370)
Committee on Technical Barriers to Trade
NOTIFICATION
The following notification is being circulated in accordance with Article 10.6.
1. Member to Agreement notifying:   THAILAND
If applicable, name of local government involved (Articles 3.2 and 7.2):           
2. Agency responsible:   Thai Industrial Standards Institute, Ministry of Industry
Agency or authority designated to handle comments regarding the notification shall be
indicated if different from above:           
3. Notified under Article 2.9.2 [ X], 2.10.1 [    ], 5.6.2 [    ], 5.7.1 [    ], other:           
4. Products covered (HS or CCCN where applicable, otherwise national tariff heading.
ICS numbers may be provided in addition, where applicable):   HS Chapter 8471.
Emission (ICS:  33.100.10)
5. Title, number of pages and language(s) of the notified document:   TIS 1956-2542
(1999) Information Technology Equipment:  Radi o Disturbance Limits (51 pages, available
in Thai)
6. Description of content:   The Thai Industrial Standards Institute (TISI) has proposed to
enforce TIS 1956-2542 (1999) as a mandatory standard.  The standard covers limits for
radio disturbance of information technology equipment (ITE).  Procedures are given for the
measurement of the levels of spurious signals generated by the ITE and limits are specifiedfor the frequency range 9 kHz to 400 GHz.  Classifies ITE into two types, i.e Type A and B.
The purpose of this standard is to establish uniform requirements for the radio disturbance
level of the equipment contained in the scope, to fix limits of disturbance, to describe
methods of measurement and to standardize operating conditions and interpretation of
results.
7. Objective and rationale, including the na ture of urgent problems where applicable:
To prevent the damage that may inflict upon the persons and economies.
8. Relevant documents:
1. Reference document:
- ITU-T Recommendation G.117:1996, Transmission aspects of unbalance
about earth;
- ITU-T Recommendation O.9.1988, Measuring agreement to assess the
degree of unbalance about earth;G/TBT/Notif.00/511
Page 2
- Danffel, H.R. and Ryser, H, Problem on the ISDN subscriber S and U
interface, ISSLS 86, pp. 145-149, 1986;
- Davies, W.S., Macfarlane, I.P. and Ben-Meir, D., "Potential EMI from
ISDN basic access systems", Electronic Letters, Vol.24, No.9 pp. 533-534,
April 1988;
- Kuwabara, N., Amemiya, F. and Ideguchi, T., "Interference field emission
due to unbalance in telecommunication lines, "IEEE Int. Symp. On EMC,
Nagoya, pp. 487-492, September 1989;
- van Maurik, R.M. "Potential Common Mode Currents On the ISDN S and
T-Interface Caused By Cable Unbalance", IEEE Eight International
Conference on Electromagnetic Compatibility, Edinburgh,
21-24 September 1992, IEEE Conference Publication No. 362,pp. 202-206;
- Hans, Lee & Chistensen, Ken, LAN Traffic Conditions for EMI
Compliance Testing, IBM Corporation, Research Triangle Park, NC.
2. Publication in which the Notification is published when adopted:
- Government Gazette
9. Proposed date of adoption:
Proposed date of entry into force: }To be determined.
10. Final date for comments:   60 days from the WTO circulation date
11. Texts available from:  National enquiry point [ X] or address, e-mail and telefax
number of the other body:           