M38 数字通信设备 标准查询与下载

ANSI/TIA/EIA 530-A-1992 数据终端设备和数据电路终端设备（包括可选择26位连接器）的高速25位接口

This document is applicable to the interconnection of data terminal equipment (DTE) and data circuit-terminating equipment (DCE) employing serial binary data interchange with control information exchanged on Sept, t, tarate control circuits. It defines signal characteristics; interface mechanical characteristics; and, functional description of interchange circuits.

High-Speed 25-Position Interface for Data Terminal Equipment and Data Circuit-Terminating Equipment, Including Alternative 26-Position Connector

ITU-T G.727 APP I FRENCH-1991 用于验证 G.727 5、4、3 和 2 位/样本嵌入式 ADPCM 算法的数字测试序列的描述

Description of the digital test sequences for the verification of the G.727 5-, 4-, 3- and 2-bit/sample embedded ADPCM algorithm

ITU-T G.727 APP I-1991 用于验证 G.727 5、4、3 和 2 位/样本嵌入式 ADPCM 算法的数字测试序列的描述 G 系列：传输系统和媒体、数字系统和网络数字传输系统 终端设备-

Description of the Digital Test Sequences for the Verification of the G.727 5-, 4-, 3- and 2-bit/Sample Embedded ADPCM Algorithm - Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Terminal Equipments -

ITU-T G.726 APP II-1991 用于验证 G.726 40、32、24 和 16 kbit/s ADPCM 算法的数字测试序列的描述 G 系列：传输系统和媒体、数字系统和网络数字传输系统 终端设备 编码

The verification testing procedure consists in applying an input sequence to an ADPCM implementation and veriQing that the output sequence is the same sequence in the output file for the same test conditions (PCM coding law, type of input, initial state of the implementation).

Description of the Digital Test Sequences for the Verification of the G.726 40, 32, 24 and 16 kbit/s ADPCM Algorithm - Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Terminal Equipments - Coding of An

ITU-T G.727 APP 1 SPANISH-1991 用于验证 G.727 5、4、3 和 2 位/样本嵌入式 ADPCM 算法的数字测试序列说明

DESCRIPTION OF THE DIGITAL TEST SEQUENCES FOR THE VERIFICATION OF THE G.727 5-, 4-, 3- AND 2-BIT/SAMPLE EMBEDDED ADPCM ALGORITHM

ITU-R INFORME M.1023-1 SPANISH-1990 陆地移动服务和广播服务的频率共用

Frequency sharing between the land mobile service and the broadcasting service (television) below 1 GHz

ANSI/TIA/EIA 561-1990 用串联数据交换的数据终端设备和数据电路终端设备间的简8位非同步接口

This document was developed in recognition of a need for physically smaller interfaces consistent with modern technology. When used in conjunction with TIA-562, this Standard provides a complete interface specification suitable for non-synchronous applications where full functionality is not required. TIA-561 is applicable to the interconnection of Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE) employing serial binary data interchange where a minimal number of control and information circuits are required. Scope, interface mechanical characteristics, and functional description of the interchange circuits are defin

Simple 8-Position Non-Synchronous Interface between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Data Interchange

ITU-T M.585-1989 引进国际数字电路到服务中-维修原则-维护国际传输系统和电话线路(第4研究组)1页

Bringing an International Digital Circuit into Service - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 1 pp

Bringing an International Digital Circuit into Service - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 1 pp

ITU-T Q.1000-1989 公用陆地移动网Q.1000系列建议的结构:ISDN及PSTN间互通的公用陆地移动网(研究组)

This Recommendation provides an overview of the Q. 1000-Series Recommendations specifically aimed atspecifying the requirements for the Public Land Mobile Network.

Structure of the Q.1000-Series Recommendations for Public Land Mobile Networks - Public Land Mobile Network Interworking with ISDN and PSTN (Study Group XI) 3 pp

ITU-T Q.1001-1989 公用陆地移动网概述:ISDN及PSTN间互通的公用陆地移动网(研究组)12页

This Recommendation covers definitions, architectures and services in Public Land Mobile Networks.

General Aspects of Public Land Mobile Networks - Public Land Mobile Network Interworking with ISDN and PSTN (Study Group XI) 12 pp

ITU-T G.711 SPANISH-1988 语音频率的脉冲编码调制（PCM）

The characteristics given below are recommended for encoding voice-frequency signals

PULSE CODE MODULATION (PCM) OF VOICE FREQUENCIES

ITU-T G.711 FRENCH-1988 语音频率的脉冲编码调制（PCM）

The characteristics given below are recommended for encoding voice-frequency signals

PULSE CODE MODULATION (PCM) OF VOICE FREQUENCIES

ITU-T G.921 SPANISH-1988 基于2048 kbit/s分级的数字段

The digital sections based on the 2048 kbit/s hierarchy should be able to transmit signals at the nominal bit rates with their corresponding tolerances as indicated in Table 1/G.921.

DIGITAL SECTIONS BASED ON THE 2048 kbit/s HIERARCHY

ITU-T G.711-1988 语音频率的脉冲编码调制(PCM)

The characteristics given below are recommended for encoding voice-frequency signals

PULSE CODE MODULATION (PCM) OF VOICE FREQUENCIES

ITU-T SERIE G SUPP 36 SPANISH-1988 数字网络中的抖动和漂移积累

Jitter and wander accumulation in digital networks

ITU-T M.1350-1988 工作在2.4kbit/s到14.4kbit/s范围的国际数据传输系统的建立、调整和特性

This Recommendation deals with the setting up, lining up and characteristics of international data transmission systems operating at speeds in the range 2.4 to 14.4 kbit/s.The system may be a single connection operating at 2.4, 4.8,7.2, 9.6 or 14.4 kbit/s, or a combination of the lower speed systems, multiplexed onto the 9.6 or 14.4 kbit/s system.

Setting up, Lining up and Characteristics of International Data Transmission Systems Operating in the Range 2.4 kbit/s to 14.4 kbit/s

ITU-T U.5-1988 在国际连接中再生中继器应满足的要求

The CCITT, considering (a) that it may be desirable to include regenerative repeaters in teleprinter switching networks; (b) that the only signals other than teleprinter signals that must be transmitted by a regenerative repeater are the clearing signal and the call-connected signal (see § 3.1.3 below), since all other signals can be bypassed; (c) that other signals may be transmitted by regenerative repeaters,

REQUIREMENTS TO BE MET BY REGENERATIVE REPEATERS IN INTERNATIONAL CONNECTIONS

ITU-T M.125-1988 数字环回机理

Loopback can be one of the mechanisms which may be applied to fault localization and failure detection.This Recommendation provides digital loopback definitions and describes loopback applications related to the maintenance phases of Recommendation M.20.

DIGITAL LOOPBACK MECHANISMS

ITU-T G.921 FRENCH-1988 基于2048 kbit/s分级的数字段

The digital sections based on the 2048 kbit/s hierarchy should be able to transmit signals at the nominal bit rates with their corresponding tolerances as indicated in Table 1/G.921.

DIGITAL SECTIONS BASED ON THE 2048 kbit/s HIERARCHY

ITU-T SERIE G SUPP 36 FRENCH-1988 数字网络中的抖动和漂移积累

Jitter and wander accumulation in digital networks