M40 电话通信设备 标准查询与下载



共找到 765 条与 电话通信设备 相关的标准,共 51

This Supplement provides definitions for a set of parameters which can be extracted from services which rely on spoken dialogue systems. The parameters can be extracted from logged (test) user interactions with the service under consideration.They quantify the flow of the interaction,the behaviour of the user and the system, and the performance of the speech technology devices involved in the interaction. They provide useful information for system development,optimization and maintenance,and are complementary to subjective quality judgments collected according to ITU-T Rec. P.851.

Parameters Describing the Interaction with Spoken Dialogue Systems

ICS
CCS
M40
发布
2005
实施

IPCablecom trunking gateway control protocol (TGCP): Profile 2 Study Group 9

IPCablecom trunking gateway control protocol (TGCP): Profile 2 Study Group 9

ICS
CCS
M40
发布
2005
实施

本标准规定了通信设备过电压过电流保护用集成电路的定义、产品型号、技术要求、试验方法、检 验规则及标志、包装、运输、贮存,本标准不涉及半导体集成电路的封装和外形尺十 本标准适用于通信交換系統鋼芯雙絞線端口過电压過电流保護用的集成电路

Integrated Circuit for The overvoltage and overcurrent protection of telecommunications installations

ICS
33.040
CCS
M40
发布
2004-12-22
实施
2005-03-01

Echo cancellers are voice operated devices placed in the 4-wire portion of a circuit (which may be an individual circuit path or a path carrying a multiplexed signal) and are used for reducing the echo by subtracting an estimated echo from the circuit e

Digital Network Echo Cancellers Series G: Transmission Systems and Media, Digital Systems and Networks International Telephone Connections and Circuits - Apparatus Associated with Long-Distance Telephone Circuits Study Group 15

ICS
33.040.20
CCS
M40
发布
2004-08-01
实施

本标准规定了总配线架的产品分类、要求、试验方法、检验规则及标志、包装、运输和贮存等。 本标准适用于电话交换局及类似的电信交换中心和接人网设备与铜芯双纹线市话通信电缆连接的独立设置的总配线架。

Main distribution frame

ICS
33.050.10
CCS
M40
发布
2004-06-22
实施
2004-09-01

本标准规定了市话通信系统(由铜芯双纹线市话通信电缆连接的交换设备、接人网设备相关部分和总配线架、终端设备等)的过电压过电流防护原则及技术要求。 本标准适用于市话通信系统的过电压过电流危险影响、耐受性和防护性能的检验,不包括过电压过电流所引起的干扰。

Principles and technical requirements of protection against overvoltages and overcurrents in local telecom system

ICS
33.040
CCS
M40
发布
2004-06-22
实施
2004-09-01

This Recommendation describes an objective single-ended method for predicting the subjective quality of 3.1 kHz (narrow-band) telephony applications. This Recommendation presents a high- level description of the method and advice on how to use it. An ANSI-C reference implementation, described in Annex A, is provided in separate files and forms an integral part of this Recommendation. A conformance testing procedure is also specified in Annex A to allow a user to validate that an alternative implementation of the model is correct. This ANSI-C reference implementation shall take precedence in case of conflicts between the high-level description as given in this Recommendation and the ANSI-C reference implementation. This Recommendation includes an electronic attachment containing an ANSI-C reference implementation and conformance testing data.

Single-ended method for objective speech quality assessment in narrow-band telephony applications

ICS
CCS
M40
发布
2004-05-01
实施

This Recommendation describes an objective single-ended method for predicting the subjective quality of 3.1 kHz (narrow-band) telephony applications. This Recommendation presents a high- level description of the method and advice on how to use it. An ANSI-C reference implementation, described in Annex A, is provided in separate files and forms an integral part of this Recommendation. A conformance testing procedure is also specified in Annex A to allow a user to validate that an alternative implementation of the model is correct. This ANSI-C reference implementation shall take precedence in case of conflicts between the high-level description as given in this Recommendation and the ANSI-C reference implementation. This Recommendation includes an electronic attachment containing an ANSI-C reference implementation and conformance testing data.

Single-ended method for objective speech quality assessment in narrow-band telephony applications

ICS
CCS
M40
发布
2004-05-01
实施

The technical requirements of intelligent public telephone system

ICS
33.050.10
CCS
M40
发布
2004-02-09
实施
2004-02-09

This Annex provides information relating to the C-S system and its protection requirements from broadband out-of-band emissions.

Protection criteria for Cospas-Sarsat search and rescue instruments in the band 406-406.1 MHz

ICS
CCS
M40
发布
2004-01-01
实施

that it continues to be used in some radiocommunication services including the amateur and amateur-satellite services, and to a diminishing extent in the mobile and fixed services;

International Morse code

ICS
CCS
M40
发布
2004-01-01
实施

This document defines the acoustic and electrical performance requirements of analog telephone alerters

Telecommunications - Telephone Terminal Equipment - Alerter Acoustic Output Performance Requirements for Analog Telephones

ICS
33.040.35
CCS
M40
发布
2004
实施

This standard provides handset acoustic performance requirements for Customer Premises Equipment (CPE) intended for wireline connection to the PUblic Switched Telephone Network (PSTN)

Telephone Instruments with Loop Signaling

ICS
33.040.35
CCS
M40
发布
2004
实施

The requirements for qualification of mobile and fixed telephone service

ICS
33.050.10
CCS
M40
发布
2003-12-30
实施
2003-12-30

Technical specification for IP telephony interworking based on H.323 and SIP

ICS
33.040
CCS
M40
发布
2003-09-08
实施
2003-09-08

Test specification for ethernet LAN switch with routing capability

ICS
33.040.30
CCS
M40
发布
2003-09-08
实施
2003-09-08

This Supplement provides the requirements for specifying the interworking between Bearer Independent Call Control (BICC) peer-to-peer protocol (i.e., ITU-T Rec. Q.1902) and ISDN User Part (ISUP) protocol (i.e., ITU-T Recs Q.761-Q.764, Q.73y.x, Q.765.x, Q.

Technical Report TRQ.2815: Requirements for interworking BICC/ISUP network with originating/destination networks based on Session Initiation Protocol and Session Description Protocol SERIES Q: SWITCHING AND SIGNALLING Study Group 11

ICS
CCS
M40
发布
2003-09-01
实施

本标准规定通信用模块式铃流信号发生器的技术要求、试验方法、检验规则和包装贮运。 本标准适用于通信用模块式铃流信号发生器 (以下简称铃流模块)。

Ring generator for telecommunication equipment

ICS
33.040
CCS
M40
发布
2003-06-04
实施
2003-06-04

GENERAL SECRETARIAT INTERNATIONAL TELECOMMUNICATION UNION

Human factors aspects of public telephones to improve their usability for older people Series E: Overall Network Operation, Telephone Service, Service Operation and human Factors International operation - General provisions concerning users Study Group 2

ICS
CCS
M40
发布
2003-06-01
实施

The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical

IPCablecom Trunking Gateway Control Protocol (TGCP) Amendment 1: TGCP Profile 2 Series J: Cable Networks and Transmission of Television Sound Programme and Other Multimedia Signals IPCablecom Study Group 9

ICS
CCS
M40
发布
2003-05-01
实施



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