M40 电话通信设备 标准查询与下载

ETSI TR 122 903-2014 数字蜂窝通信系统 (第2+阶段). 通用移动通信系统 (UMTS). LTE. 可视电话业务研究 (V12.0.0; 3GPP TR 22.903版本12.0.0, 版本12)

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Study on Videotelephony teleservice (V12.0.0; 3GPP TR 22.903 version 12.0.0 Release 12)

ITU-R BO.1443-3-2013 附录30覆盖频段中包含非静止卫星的干扰评估的参考BSS地球站天线图

This Recommendation intends to provide tri-dimensional reference earth station antenna patterns for the broadcasting-satellite service (BSS) that can be used for the calculation of interference generated by non-GSO FSS satellites into BSS earth station.

Reference BSS earth station antenna patterns for use in interference assessment involving non-GSO satellites in frequency bands covered by RR Appendix 30

ITU-T P.58-2013 通话计时用头部模拟器和躯干模拟器.12号研究组

This Recommendation specifies the electroacoustic characteristics of the head and torso simulator (HATS) for telephonometric use. Both sound emissions and sound pick-up characteristics are specified; the free-field acoustic diffraction is specified as well.

Head and torso simulator for telephonometry (Study Group 12)

ANSI/SCTE 24-22-2013 有线电话中IP电话应用的iLBCv2.0语音编解码器规范

iLBCv2.0 Speech Codec Specification for Voice over IP Applications in Cable Telephony

ANSI/TIA-470-210-E-2013 电信.电话终端设备.模拟电话用电阻和阻抗的性能要求

Telecommunications - Telephone Terminal Equipment - Resistance and Impedance Performance Requirements for Analog Telephones

ETSI TR 103 210-2013 语音和多媒体传输质量(STQ).NGN上下文中实时业务的端到端抖动传输规划要求 版本1.1.1

Speech and multimedia Transmission Quality (STQ); End-to-ENd Jitter Transmission Planning Requirement for Real Time Services in an NGN context V1.1.1

YD/T 991-2012 通信仪表的电磁兼容性限值及测量方法

本标准规定了通信仪表的电磁兼容性(EMC)要求,包括限值、性能判据和测量方法等。本标准适用于各种类型的通信仪表。

Limits and methods of measurement of electromagnetic compatibility for communication instruments

ITU-T G.1070-2012 视频电话应用的意见模型.12号研究组

This Recommendation describes a computational model for point-to-point interactive videophone applications over IP networks that is useful as a QoE/QoS planning tool for assessing the combined effects of variations in several video and speech parameters that affect the quality of experience (QoE). This model can be used by QoE/QoS planners to help ensure that users will be satisfied with end-to-end service quality. Actually they want to avoid under-engineering. Network, application and terminal quality parameters of high importance to QoE/QoS planners are incorporated into this model.

Opinion model for video-telephony applications (Study Group 12)

ITU-T P.501 AMD 1-2012 用于通话计时的测试信号.修改件1

This Recommendation describes test signals which are applicable for several purposes in telephonometry. A wide variety of test signals is given, starting with low complexity test signals up to test signals with a high degree of complexity incorporating a lot of typical parameters of speech. Besides technical signals such as sine waves or noise, more speech-like signals are described.

(Pre-Published) Test signals for use in telephonometry Amendment 1

ITU-T SERIES P SUPP 26-2012 (预发布)的音频和视听多方电话会议主观质量评价方案

This supplement concerns subjective quality assessment of telemeeting systems that provide communication between multiple parties at distant locations.As multiparty telemeetings can differ in a large number of aspects,the assessment of such systems requires a proper selection and control of the considered aspects and a precise description when reporting results.Recommendation ITU-T P.1301 provides guidelines to select and–if necessary–adapt existing methods for subjective evaluation of multiparty telemeetings.Concerning the evaluation of conversational quality of multiparty telemeetings,ITU-T P.1301 provides also descriptions of conversation tasks.The present supplement complements these with example scenarios for conversation test scenarios for three parties.

Scenarios for the subjective quality evaluation of audio and audiovisual multiparty telemeetings (Study Group 12)

ITU-R M.625-4-2012 海上移动业务中使用自动识别的直接印字电报设备(代替:ITU-R M.625-3法语ITU-R M.625-3西班牙语)

The Recommendation provides in Annex 1 characteristics of direct-printing telegraph equipment employing a 7-unit ARQ method for selective communication, a 7-unit FEC method for broadcast mode and automatic identification. Equipment developed in accordance with this Recommendation provides compatibility with equipment without maritime mobile service identity (MMSI) conforming to Recommendation ITU-R M.476.

Direct-printing telegraph equipment employing automatic identification in the maritime mobile service

ITU-T P.501-2012 (预发布)用于通话计时的测试信号

This Recommendation describes test signals which are applicable for several purposes in telephonometry. A wide variety of test signals is given, starting with low complexity test signals up to test signals with a high degree of complexity incorporating a lot of typical parameters of speech. Besides technical signals such as sine waves or noise, more speech-like signals are described.

Test signals for use in telephonometry (Study Group 12)

ANSI/TIA-4953-2012 电信.电话终端设备.扩音电话测量规程和性能要求

This standard establishes telephone audio performance requirements, measurement methods, and test procedures for telephones with high receive gain and control of the receive frequency spectrum. This standard addresses audio performance in narrow band telephony frequencies using scientific methods and techniques derived or adapted from current telephone measurement standards. Narrow band is defined as the frequency range between 300 and 3400 Hz.

Telecommunications - Telephone Terminal Equipment - Amplified Telephone Measurement Procedures and Performance Requirements

ANSI/TIA-968-B-1-2012 电信.电话终端设备.终端设备连接到电话网络的技术要求

Revises TIA 968-B to: - Update references to TSB-31-D and TSB-129-B; - Correct the titles of two figures; and - Correct several VDSL2 tables and figures.

Telecommunications - Telephone Terminal Equipment - Technical Requirements for Connection of Terminal Equipment to the Telephone Network

IEEE 269a-2012 模拟和数字电话机、话筒和听筒传输性能测量方法的IEEE标准.修改件1

IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets; Amendment 1

ETSI ES 200 381-2-2012 听障人群的电话.助听电话耳机的电感耦合.第2部分:蜂窝语音终端 版本1.1.1. 包括磁盘

Telephony for hearing impaired people; Inductive coupling of telephone earphones to hearing aids; Part 2: Cellular speech terminals (V1.1.1; Includes Diskette)

ANSI/TIA-4965-2012 电信.电话终端设备.数字和模拟电话线终端的接收音量控制要求

Telecommunications - Telephone Terminal Equipment - Receive Volume Control Requirements for Digital and Analog Wireline Terminals

ANSI/SCTE 24-23-2012 有线电话中IP电话用BV32语音多媒体数字信号编解码器规范

This document contains the description of the BV32 speech codec. BV32 compresses 16 kHz sampled wideband speech to a bit rate of 32 kb/s (kilobits per second) by employing a speech coding algorithm called Two-Stage Noise Feedback Coding (TSNFC), developed by Broadcom.

BV32 Speech Codec Specification for Voice over IP Applications in Cable Telephony

YD/T 719-2011 响度评定值的客观测量方法

本标准规定了响度评定值的客观测量方法，包括具体的测试条件和方法、灵敏度/频率特性的测量、响度评定值的计算等。 本标准适用于语音通信终端响度评定值的测量。

Objective measurement method of loudness rating

YD/T 907-2011 接入电话网的电话机和其他设备上用于发号的数字、字母和符号

本标准规定了电话机号盘上所使用的数字、字母和符号；规定了这些数字、字母和符号的排列方案以及“*”、“#”符号的图形样式等。 本标准适用于接入电话网使用的电话机和具有电话号盘功能的其他设备。

Arrangement of digits,letters and symbols on telephones and other devices that can be used for gaining access to a telephone network