TIA-TSB-18-A-1988-R2002.pdf
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1、p: a 00 3 I v1 B TIA/EIA TELECOMMUNICATIONS SYSTEMS BULLETIN The Mechanical/Functional Characteristics of the Interface Between DCEs and Voiceband Analog Channels TSB-18-A REAFFIRMED JUNE 2002 FEBRUARY 1988 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Teleconmiunications Industry Association represen
2、ts the conmiunications sector of Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:05:01 MDTNo reproduction or networking permitted without license from IHS -,-,- NOTICE TIA/EIA E
3、ngineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the prope
4、r product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of TIA/EIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications pr
5、eclude their voluntary use by those other than TIA/EIA members, whether the standard is to be used either domestically or internationally. Standards, Publications and Bulletins are adopted by EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA/E
6、IA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard, Publication, or Bulletin. Technical Bulletins are distinguished from TIA/EIA Standards or Interim Standards, in that they contain a compilation of engineering data or in
7、formation useful to the technical community, and represent approaches to good engineering practices that are suggested by the formulating committee. This Bulletin is not intended to preclude or discourage other approaches that similarly represent good engineering practice, or that may be acceptable
8、to, or have been accepted by, appropriate bodies. Parties who wish to bring other approaches to the attention of the formulating committee to be considered for inclusion in future revisions of this Bulletin are encouraged to do so. It is the intention of the formulating committee to revise and updat
9、e this Bulletin from time to time as may be occasioned by changes in technology, industry practice, or government regulations, or for other appropriate reasons. (From Project No. 3-2581, formulated under the cognizance of the TIA TR-30.3 Subcommittee on Data Communications Network Interfaces) This d
10、ocument was reaffirmed by the Telecommunications Industry Association on June 1 O, 2002. Published by OTELECOMMUNICATIONS INDUSTRY ASSOCIATION 1988 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 U.S.A. PRICE: Please refer to the current Catalog of ELECTRONIC INDUSTRIES
11、 ALLIANCE STANDARDS and ENGINEERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1 -800-854-71 79) International (303-397-7956) All rights reserved Printed in U.S.A. Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1
12、111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:05:01 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/3
13、0/2007 20:05:01 MDTNo reproduction or networking permitted without license from IHS -,-,- NOTICE OF DISCLAIMER AND LIMITATION OF LIABILITY The document to which this Notice is affixed has been prepared by one or more Engineering Committees of the Telecommunications Industry Association (“TIA”). TIA
14、is not the author of the document contents, but publishes and claims copyright to the document pursuant to licenses and permission granted by the authors of the contents. TIA Engineering Committees are expected to conduct their affairs in accordance with the TIA Engineering Manual (“Manual”), the cu
15、rrent and predecessor versions of which are available at http:/www.tiaonline.orZr/standards/sfZr/engineering manual.ch. TIAS function is to administer the process, but not the content, of document preparation in accordance with the Manual and, when appropriate, the policies and procedures of the Ame
16、rican National Standards Institute (“ANSI”). THE USE OR PRACTICE OF CONTENTS OF THIS DOCUMENT MAY INVOLVE THE USE OF INTELLECTUAL PROPERTY RIGHTS (“IPR), INCLUDING PENDING OR ISSUED PATENTS, OR COPYRIGHTS, OWNED BY ONE OR MORE PARTIES. TIA MAKES NO SEARCH OR INVESTIGATION FOR IPR. WHEN IPR CONSISTIN
17、G OF PATENTS AND PUBLISHED PATENT APPLICATIONS ARE CLAIMED AND CALLED TO TIAS ATTENTION, A STATEMENT FROM THE HOLDER THEREOF IS REQUESTED, ALL IN ACCORDANCE WITH THE MANUAL. TIA TAKES NO POSITION WITH REFERENCE TO, AND DISCLAIMS ANY OBLIGATION TO INVESTIGATE OR INQUIRE INTO, THE SCOPE OR VALIDITY OF
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