TIA-1001-2004 Transport of TIA-825-A Signals over IP Networks《IP网络上TIA-825-A信号的传输》.pdf
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1、 TIA STANDARD Transport of TIA-825-A Signals over IP Networks TIA-1001 October 2004 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the communications sector of NOTICE TIA Engineering Standards and Publications are designed to serve the public interest
2、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 proper product for their particular need. The existence of such Publications shall no
3、t in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Publications. Neither shall the existence of such Documents preclude their voluntary use by non-TIA members, either domestically or internationally. TIA DOCUMENTS TIA Documents con
4、tain information deemed to be of technical value to the industry, and are published at the request of the originating Committee without necessarily following the rigorous public review and resolution of comments which is a procedural part of the development of a American National Standard (ANS). Fur
5、ther details of the development process are available in the TIA Engineering Manual, located at http:/www.tiaonline.org/standards/sfg/engineering_manual.cfm TIA Documents shall be reviewed on a five-year cycle by the formulating Committee and a decision made on whether to reaffirm, revise, withdraw,
6、 or proceed to develop an American National Standard on this subject. Suggestions for revision should be directed to: Standards (b) there is no assurance that the Document will be approved by any Committee of TIA or any other body in its present or any other form; (c) the Document may be amended, mo
7、dified or changed in the standards development or any editing process. 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
8、for IPR. When IPR consisting of patents and published pending 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 inq
9、uire into, the scope or validity of any claims of IPR. TIA will neither be a party to discussions of any licensing terms or conditions, which are instead left to the parties involved, nor will TIA opine or judge whether proposed licensing terms or conditions are reasonable or non-discriminatory. TIA
10、 does not warrant or represent that procedures or practices suggested or provided in the Manual have been complied with as respects the Document or its contents. TIA does not enforce or monitor compliance with the contents of the Document. TIA does not certify, inspect, test or otherwise investigate
11、 products, designs or services or any claims of compliance with the contents of the Document. ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISCLAIMED, INCLUDING WITHOUT LIMITATION, ANY AND ALL WARRANTIES CONCERNING THE ACCURACY OF THE CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR U
12、SE, ITS MERCHANTABILITY AND ITS NON-INFRINGEMENT OF ANY THIRD PARTYS INTELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL RESPONSIBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO REPRESENTATIONS OR WARRANTIES REGARDING THE CONTENTS COMPLIANCE WITH ANY APPLICABLE STATUTE, RULE OR R
13、EGULATION, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HER
14、EIN, INCLUDING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERW
15、ISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. i Transport of TIA-825-A signals over IP Networks CONTENTS 1 Scope . 1 2 N
16、ormative References . 1 3 Definitions. 2 3.1 Version of Standard 3 4 Abbreviations 3 5 Textphone-Over-IP Functions. 3 5.1 Signal Converter. 4 5.2 Codec 4 5.3 T.140 encode/decode 4 5.4 RFC 2793 bis 4 5.5 RTP 4 5.6 UDP 4 5.7 Optional Functions . 4 5.7.1 SSE Protocol 4 5.7.2 SPRT IP-TLP. 4 6 Connection
17、 and Network Scenarios 5 6.1 Service and Performance requirements for TIA-1001 . 5 6.2 Audio and Text functionality . 5 6.2.1 Text in Both Directions 5 6.2.2 Text and Voice Alternating in opposite directions 5 6.2.3 Text and Voice Alternating in the same direction . 5 6.3 Interactive Voice Response
18、System and DTMF signalling Support 5 7 Transport Methods 5 7.1 Audio Mode 5 7.2 VBD Mode . 6 7.3 Text Relay Mode 6 8 VBD Operation 6 9 Text Relay Operation 6 9.1 IP Transport for Text Relay 6 9.2 Text Relay Throughput 6 9.3 TIA-825-A encoding requirements 6 9.4 Cleardown in Text Relay 6 9.5 Optional
19、 use of SPRT. 7 10 Gateway to Gateway Protocol definitions and procedures 7 11 Gateway Capability and Call Set-up messages . 7 11.1 TIA-1001 Version 7 11.2 VBD parameters. 7 12 SSE Reason Identifier Codes. 7 13 Call Set up procedures. 7 14 Call discrimination procedures 7 15 Call Discrimination SDL
20、Diagrams 8 15.1 SDL for Payload Type Switching 8 15.2 SDL for optional SSE. 10 Annex A (normative) . 15 Annex B (normative) . 18 Annex C (normative) . 19 Annex D (informative). 20 Annex E (informative) . 24 Annex F (informative) . 25 iii FORWARD (This forward is not part of this Standard) This Stand
21、ard was developed by TIA technical sub-committee TR-30.1, Modems, under project number PN-3-0098. TIA-1001 1 1 Scope This Standard defines the requirements for the reliable transport, using Text Relay, of Textphones using TIA-825-A signals, and other signaling associated with Baudot TDDs, across IP
22、networks that connect two or more PSTNs (Figure 1). The Standard describes the functionality of Text Telephony Gateways, which connect between the PSTN and an IP network. This Standard also provides the ability for switching between TIA-825-A signals and voice during a call. The Standard defines Tex
23、t Relay for TIA-825-A to TIA-825-A Textphone connections with Voice Band Data (VBD) being supported only as a means to support connections that include at least one non TIA-825-A terminal or one gateway that does not support TIA-1001 or ITU-T Recommendation V.151. Figure 1 Typical TIA-1001 Applicati
24、on 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Standard a
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