I NTERNATIONAL T ELECOMMUNICATION U NION
Telecommunication
Standardization Bureau
Geneva, 22 February 2001
Ref:
TSB Circular 29
COM 2/ZJT
Tel:
Fax:
+41 22 730 5887
+41 22 730 5853
john.tar@itu.int
E-mail:
- To Administrations of Member States of the Union;
Copy:
- To ITU-T Sector Members;
- To ITU-T Associates;
- To the Chairman, Deputy Chairman and ViceChairmen of Study Group 2;
- To the Director of the Telecommunication
Development Bureau;
- To the Director of the Radiocommunication Bureau
Approval of 13 revised or new ITU-T Recommendations
Subject:
Dear Sir/Madam,
1.
Further to TSB Circular 6 of 9 November 2000 and its Addendum 1 of 7 December 2000, I
hereby inform you that 26 Member States participating at the last meeting of Study Group 2,
approved the texts of eight revised and five new Recommendations during its plenary sessions on
23 January and 2 February 2001.
2.
Annex 1 gives you the titles of the approved texts of these revised or new ITU-T
Recommendations.
3.
Available patent information can be accessed on-line via the ITU-T Website.
4.
The texts of pre-published Recommendations will soon be available on the ITU-T Website.
5.
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
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-2-
ANNEX 1
(to TSB Circular 29)
Titles of the revised and new ITU-T Recommendations approved by Study Group 2
at its plenary sessions on 23 January and 2 February 2001
1.
Recommendation E.118 (Revised)
The International Telecommunication Charge Card
2.
Recommendation E.123 (Revised)
Notation for national and international telephone numbers, e-mail addresses and web
addresses
3.
Recommendation E.152 (Revised)
International Freephone Service
4.
Recommendation E.155 (Revised)
International Premium Rate Service
5.
Recommendation E.161 (Revised)
Arrangement of digits, letters and symbols on telephones and other devices that can be
used for gaining access to a telephone network
6.
Recommendation E.164.2 (New)
E.164 Numbering resources for trials
7.
Recommendation E.191.1 (New)
Criteria and procedures for the allocation of ITU-T International Network Designator
Addresses
8.
Recommendation E.353 (New)
Routing of calls when using international routing addresses
9.
Recommendation E.370 (New)
Service principles when public circuit-switched international telecommunication networks
interwork with IP-based networks
10.
Recommendation E.417 (New)
Framework for the network management of IP-based networks
11.
Recommendation E.451 (Revised)
Facsimile call cut-off performance
12.
Recommendation E.502 (Revised)
Traffic measurement requirements for digital telecommunication exchanges
13.
Recommendation E.737 (Revised)
Dimensioning methods for B-ISDN