1、CEPT NET*33 92 E 232b414 OOL14L4 078 CEPT NET*33 92 m 232b414 0011415 TO4 W NET 33 First edition: 1992 EUROPEAN TELECOMMUNICATION STANDARD Integrated Services Digital Network (ISDN); 3.1 kHz telephony teleservice Attachment requirements for handset terminals Published by: CEPT Liaison Office Seilers
2、trasse 22 CH-3008 Bern Telephone: Facsimile: Telex: 911089 CEPT CH + 41 3 1 62 20 8 1 + 41 31 62 20 78 CEPT NET*33 92 2326434 0011416 940 THE EUROPEAN CONFERENCE OF POSTAL AND TELECOMMUNICATIONS ADMINISTRATIONS (CEPT) I Copyright 1992 the European Conference of Postal and Telecommunications Administ
3、rations (CEPT). i II NET 33 CEPT NET*33 92 2326434 00334L7 887 = NORMES EUROPENNES DE TLCOMMUNICATION It is recognized, in the field of telecommunications within Europe, that there is a need to create common European standards for telecommunications equipment. Such harmonization would among other th
4、ings facilitate cooperation between telecommunications equipment manu- facturers and public telecommunications network operators, create a marketplace which naturally transcends that of na- tional frontiers, enhance the efficiency of business and other communication across Europe to bring economic b
5、enefits, and help translate the vision of a united Europe into a working reality. In 1985 an initiative by the Conference of European Posts and Telecommunications Administrations (CEPT) re- sulted in the drafting of a Memorandum of Understanding (MOU) agreeing to the mutual recognition of results of
6、 tests of conformity to a technical specification which would be known as a Norme Europenne de Tlcommunication (or NET). A list of signatories to the MOU is shown at the end of this introductory text. The signatories represent telecommunica- tions Administrations in most countries in Western Europe,
7、 including EEC and EFTA Administrations. In 1986 the European Community Council Directive 86/361/EEC laid down the principles of the initial stage of the mutual recognition of type approval for telecommunications terminal equipment. The Directive imposes the obligation on EC Member States to impleme
8、nt the recognition of tests to common conformity specifications. 1 NETs 1.1 include: - - Guiding principles under which a NET is written are the need to ensure essential requirements are met. These user safety insofar as this requirement is not covered by other legal instruments (e.g. Directive 73/2
9、3/EEC) safety of employees of public telecommunications network operators insofar as this requirement is not covered by other legal instruments (e.g. Directive 73/23EEC) protection of public telecommunications networks from harm interworking of terminal equipment, in justified cases - - 1.2 Each NET
10、 constitutes part of a series of NETs prepared in response to the MOU and the EC Directive 861361. 1.3 A NET details the requirements, and a specification of interface tests for conformance to those requirements, which a defined type of telecommunications terminal equipment is required to satisfy in
11、 order to obtain authorization for connec- tion of the equipment to a defined European telecommunications network. The NET also includes, where appropriate, re- quirements made necessary in a given State by historical network peculiarities. 1.4 The existence of a NET will make it possible for an acc
12、redited laboratory in a country whose Administration has signed the MOU, to carry out tests, specified in the NET, on terminal equipment submitted to it, and to issue a test report. On the basis of the report, a competent body may then issue a certificate of conformity to the NET. There may of cours
13、e be cases where the laboratory itself is the competent certification authority. This certificate is then recognized as valid in all the other signatory countries, avoiding the need for the equipment to have to undergo the same tests over again each time approval is applied for in any of those count
14、ries. 1.5 The common reference point which a NET represents thus offers the opportunity of substantially reducing the complexity, length and cost of approval formalities. The operators of public networks are required to make reference to relevant NETS in public supply contracts. Manufacturers are th
15、ereby enabled to compete on a more equal technical basis in the supply of terminal equipment covered by NETs. 2 TYPES OF NET The majority of NETs falls into one of the two categories: access NETs and terminal NETs. (a) Access NET Details of the technical characteristics (electrical, mechanical and a
16、ccess control protocol), to be offered by terminal equipment at the interface to a specific public telecommunications network are covered in an “access NET“. The objective of an access NET is to ensure no disturbance occurs to the network and to ensure interworking between network and terminal equip
17、ment so that calls can be routed successfully through the network (but without any guarantee of terminal to terminal operation). Indeed, since an access NET may have to serve a number of terminal NETS and applications which have not even been envisaged at present, it is important for the content not
18、 to include anything which is particular to a specific terminal or otherwise .inhibiting to new developments. NET 33 III CEPT NET*33 92 m 2326434 003341B 713 m (b) Terminal NET The objective of a terminal NET is to ensure the end-to-end compatibility of a defined telecommunication ser- vice. The ter
19、minal NET should include any requirements which must be added to the corresponding access NET( s) to ensure end-to-end communication. 3 DATE OF APPLICATION The date of application of a NET is that date at which the NET is recognized as being applicable, in the signatory Administrations, for the purp
20、oses of type approval, under the terms of Directive 86/361/EEC. 4 TRANSITION PERIOD 4.1 which there will be coexistence between the NET and any national requirements which relate to the Scope. The transition period commences at the date of application. The transition period is a period of flexibilit
21、y during After the expiry of the transition period the only applicable standard within the Scope for type approval purposes will be that of the particular NET. The end of the transition period is fixed by TRAC as an objective for all signatory countries of the MOU. In some cases, however, for exampl
22、e when a new network has to be set up, all network operators may not be in a position to meet the objective. In such cases, the end of the transition period will be a date which is individual to the given country, and Administrations will publish the projected date by which the end of the transition
23、 period can be achieved. 4.2 transition period: The following notes are offered as guidance on Conformance testing of telecommunications equipment during the During the transition period, new telecommunications equipment offered by manufacturers under the Scope of this NET may be tested at a certifi
24、ed laboratory located within the signatory countries, either under this NET or under the exist- ing national requirements, at the choice of the manufacturer. Testing under the NET rather than under the old requirements might offer the manufacturer the opportunity of a larger marketplace in which to
25、sell the equipment. The transition period is also an opportunity for the public network operators to update their network. However, a national approval authority would have the facility of refusing the approval of terminal equipment, for which a certificate of conformance to a NET had been issued, i
26、f the network were not yet compatible with the terminal equipment to be con- nected. 4.3 already been approved either before application of this NET or during the transition period. The following note is offered as guidance on the supply and connection of telecommunications equipment that has After
27、the application date of this NET, that is, during and after the transition period, the supply and connection of equipment already approved to earlier standards may continue unless the national authority terminates the validity of approvals to earlier standards for whatever reason. Figure 1 is a diag
28、nammatic representation of the above points. 5 APPROVAL PROCEDURES Details of national type approval procedures are not contained within NETs, but are decided by national Adminis- trations. 6 REQUIREMENTS TO BE SATISFIED The scope statement defines which types of equipment must meet the requirements
29、 of each NET. In addition, equip- ment may also have to satisfy the requirements in other NETs (as defined in their scope statements) or, in the absence of hannonised NETs, one or more published national standards. In the absence of any requirements in other NETs or in pub- lished national standards
30、, no additional tests may be sought by any approval authority in the countries whose Administra- tion has signed the MOU. 7 LEGAL BASIS OF THIS INTRODUCTION TEXT This introductory text is provided for guidance, and to aid interpretation. Readers are advised that the legally binding document in the E
31、C countries is the EEC Directive 861361. IV NET 33 CEPT NET*33 92 W 2326414 001L4L7 b5T (A) Conformance Test i ng Under old requirements + Under this NET (B) Supply and Connection of Equipment Type- Approved before end of Transition Period - Data of Application of NET End of Transition Period -b FIG
32、URE 1 NET 33 v CEPT NET*33 92 = 2326434 0033420 373 rn 8 SIGNATORIES OF THE MOU Austria Belgium Denmark Finland France F. R. Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom 9 AMENDMENTS TO A NET There may in the future be a need for
33、 amendments to a NET. Any amendments to a NET, or suspension or with- drawal of a NET, will be decided by the Technical Recommendations Application Committee (TRAC) and notified through appropriate channels including publication in the EC Official Journal. Errors detected within the text of a NET, o
34、r difficulties experienced with the application of a NET, should be reported to the following address: The Director, Office of the Secretariat, European Telecommunications Standards Institute, BP 52 F-O6569 Valbonne Cedex The comments will be considered and acted upon by TRAC under an approved modif
35、ications procedure. Public consultation will take place in respect of all but the most urgent modifications to this NET. 10 THIS NET (NET 33) 10.1 Adoption (TRAC), on the basis of an ETSETSI, on the 2 October 1991, Rhodes, Greece. The content of NET 33 was adopted by a meeting of the Technical Recom
36、mendations Application Committee 10.2 Date of Application tion period. This NET applies from 1 April 1992 within those States represented in the list of signatories, subject to the transi- 10.3 period on 31 March 1993 the only applicable standard for type approval purposes within the Scope will be t
37、his NET. Transition Period for this NET This NET is subject to a transition period of one year from the date of application. After the expiry of the transition VI NET 33 Foreword 1 2 3 3.1 3.2 4 5 5.1 5.1.1 5.1.2 5.1.3 5.1.4 5.2 5.2.1 5.2.1.1 5.2.1.2 5.2.1.3 5.2.1.4 5.2.1.4.1 5.2.2 5.2.2.1 5.2.2.2 5
38、.3 5.4 6 6.1 6.1.1 6.1.2 6.1.3 6.2 6.2.1 6.2.1.1 6.2.1.2 6.2.2 6.2.2.1 6.2.2.2 6.2.3 6.2.3.1 6.2.3.2 6.2.4 6.2.4.1 6.2.4.2 6.2.5 6.2.5.1 6.2.5.1.1 6.2.5.1.2 6.2.5.2 6.2.5.2.1 6.2.5.2.2 6.2.5.3 6.2.6 6.2.6.1 6.2.6.2 CEPT NETa33 92 232bYlY OOLL421 208 = TABLE OF CONTENTS Scope Normative references Def
39、initions and abbreviations Definitions Abbreviations Access channel selection Call control functions Outgoing calls Overlap and en-bloc sending Coding of Bearer Capability (BC) information element Coding of High Layer Compatibility (HLC) information element Coding of Low Layer Compatibility (UC) inf
40、ormation element Incoming calls Compatibility checking Coding of Bearer Capability (BC) information element Coding of High Layer Compatibility (HLC) information element Coding of Low Layer Compatibilio (LLC) information element Terminal selection Operation of the designated terminal under restricted
41、 power conditions Incoming call indication Terminal is not engaged in a telephone call Terminal is busy Information tones Multi-Frequency Push Button (MFPB) signalling Transmission aspects General Encoding Relative level Volume control Speech pe$ormance characteristics (Handset 3. I kHz telephony) S
42、ensitivityrequency response Sending Receiving Sending and Receiving Loudness Ratings (SLR and RLR) Nominal values Volume control Sidetone Talker sidetone Listener sidetone Terminal Coupling Loss (TCL) Weighted Terminal Coupling Lass (TCLw) Stability loss Distortion Sending Method 1 5 (Pseudo random
43、noise stimulus) Method 2 (Sinusoidal test signal) Receiving Method 1 Method 2 Sidetone 22 Variation of gain with input level Sending Receiving 6 6 7 7 7 7 7 7 7 8 8 8 9 9 9 10 10 10 10 10 10 11 11 11 11 11 11 11 11 11 11 11 12 12 12 12 13 13 13 13 13 13 13 13 13 13 14 14 14 14 14 14 NET 33 1 6.2.7 6
44、.2.7.1 6.2.7.2 6.2.8 6.2.8.1 6.2.8.2 6.2.8.3 6.2.9 6.2.9.1 6.2.9.2 6.2.10 6.3 6.4 7 7.1 7.2 7.2.1 7.2.2 7.3 7.4 8 8.1 8.2 8.2.1 8.2.2 8.2.2.1 8.2.2.2 8.2.3 8.2.4 9 CEPT NET+33 92 = 2326434 OOLl422 344 W Out-of band signals Discrimination against out-of band input signals (sending) Spurious out-of-ba
45、nd (receiving) Noise Sending Receiving Level of sampling frequency (receiving) Acoustic shock Continuous signal Peak signal Delay Loudspeaking and handsfree telephony Non-linear devices Power feeding General conditions Operation under restricted power conditions Leakage current Designated terminal f
46、unctions Method of designation Visibility of designation Physical modules Handset Audible alerting module Sound pressure level Alerting module control Starting Stopping Adjustment of loudness Adjustment of sound characteristics Testing and approval methodology 15 15 15 15 15 15 16 16 16 16 16 16 16
47、16 16 16 16 16 16 17 17 17 17 17 17 17 17 17 18 18 Annex A (normative): Test specifications 19 A. 1 A.l.l A. 1.2 A. 1.3 A. 1.4 A.1.4.1 A. 1.4.2 A. 1.4.2.1 A. 1.4.2.2 A. 1.5 A. 1.6 A.1.7 A.2 A.2.1 A.2.1.1 A.2.1.2 A.2.2 A.2.2.1 A.2.2.2 A.2.3 A.2.3.1 A.2.3.2 A.2.4 A.2.4.1 ,A.2.4.2 A.2.5 A.2.5.1 A.2.5.1
48、.1 A.2.5.1.2 A.2.5.2 A.2.5.2.1 A.2.5.2.2 2 General conditions for testing Environment for tests Power supply limitations Test equipment integace Test equipment requirements Electro-acoustic equipment Test equipment for digital telephone sets Codec approach and specification Direct digital processing
49、 approach Alternative test methods Accuracy of test measurements Bandwidth Transmission requirements testing Sensitivityflrequency response Sending Receiving Loudness ratings Sending Loudness Rating (SLR) Receiving Loudness Rating (RU) Sidetone Talker sidetone Listener sidetone Terminal coupling loss Weighted terminal coupling loss Stability loss Distortion Sending Method 1 Method 2 Receiving Method 1 Method 2 NET 33 19 19 19 19 19 19 19 19 20 20 20 20 20 20 20 20 21 21 21 21 21 21 22 22 22 23 23 23 23 23 23 23 CEPT NET*33 92 2326434 0033423 080 A.2.5.3 A.2.6 A.2.6.1 A.2.6.2 A.2.7 A.2
