Standard No.:	YD/T 1277.1-2003
Chinese Name:	固定电话网主叫识别信息传送技术要求及测试方法 第一部分:技术要求
English Name:	Technical specification and testing method of caller identity delivery based on PSTN part 1:technical specification
Professional Classification:	M40 Telephone communication equipment
Professional Classification:	YD Professional Standard - Telecommunication
ICS Classification:	33.050.10 Telephone equipment
Issued by:
Issued on:	2003-06-05
Implemented on:	2003-06-05
Status:
Language:	English
File Format:	PDF
Word Count:	14000 words
Price(USD):	420 (USD)
Delivery:	via email in 1-3 business day

1 Scope

This standard specifies the delivery protocol between local switch (LS) and customer premises equipment (CPE) as well as the technical specifications for adapting to the caller identity deliver service of LS and CPE.
This standard is applicable to the realization of caller identity deliver on analog subscriber line based on PSTN.
This standard describes the realization of caller identity deliver service based on PSTN.
This standard excludes all the internetwork signaling between digital stored program control (SPC) switch for caller identity delivery.

2 Normative References

The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrigendum contents) or revisions do not apply. However, the parties who enter into agreement according to this part are encouraged to research whether the latest editions of these documents are applied or not. For undated normative references, the latest edition of the normative document is applicable to this part.
GB 2312 Information Technology - Code of Chinese Graphic Character Set for Information Interchange - Primary Set
GB/T l988 Information Technology - 7-bit Coded Character Set for Information Interchange
GB/T 15279 The Specifications of Automatic Telephone Set
YD/T 868 Technical Requirements and Measuring Methods for Additional Equipment for Telephone Set
YD/T 965 The Safety Requirement and Test Method for Telecommunication Terminal Equipment
YD/T 968 Limits and Methods of Measurement of Electromagnetic Compatibility for Telecommunication Terminal Equipment
YD/T 1157 The Transfer of Calling Party Number between Operators

3 Definitions and Abbreviations

3.1 Definitions
Customer Premises Equipment (CPE): terminal equipment with caller identity reception and display function, and/or message edit and delivery function.
User: the object using CPE to control or obtain caller identity.
Originating switch: the LS at calling terminal.
Terminal switch: the LS at called terminal.
Ring burst: the ringing current signal before the first ring, which is sent by the terminal switch. The level and frequency of ring burst are the same as those of the common ringing signals, while its duration and interval are indefinite.