
I
T
U
Geneva, 1 December 1999
Ref:
Tel:
Fax:
TSB Circular 233
COM 10/MN
+41 22 730 6071
+41 22 730 5853
- To the Administrations of Member States
of the Union
Copy:
- To ITU-T Sector Members;
- To the Chairperson and Vice-Chairperson
of Study Group 10;
- To the Director of the Telecommunication
Development Bureau;
- To the Director of the Radiocommunication Bureau
3
4
Subject: Approval of 4 draft revised and 2 draft new
ITU-T Recommendations
Dear Sir/Madam,
1 Further to TSB Circular 208 of 28 July 1999, I hereby inform you that 9 Member
States participating in the last meeting of Study Group 10, approved the text of 4 draft revised and 2 new ITU-T Recommendations during its Plenary session held on 19 November
1999.
2 Annex 1 gives you the titles of the approved texts of these revised and new ITU-T
Recommendations.
Available patent information can be accessed on-line via the ITU-T Website.
The texts of these Recommendations will be published by the ITU as soon as possible.
Yours faithfully,
H. Zhao
Director of the Telecommunication
Standardization Bureau
Annex : 1
Place des Nations
CH-1211 Geneva 20
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Annex 1
(To TSB Circular 233)
ITU-T Recommendations approved at the Plenary sessions of Study Group 10
1. Revised Recommendation Z.100
Specification and Description Language (SDL)
2. Revised Recommendation Z.105
SDL combined with ASN.1 Modules (SDL/ASN.1)
3. Revised Recommendation Z.120
Message Sequence Chart (MSC)
4. Revised Recommendation Z.200
CHILL - The ITU-T Programming Language
5. New Recommendation Z.107
SDL with embedded ASN.1
6. New Recommendation Z.109
SDL combined with UML
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