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IP电话的关键技术
- ip电话的关键技术,包括语音编码,压缩,打包,分组交换,以及保证语音质量而采取的回声抵消技术.-ip telephone key technologies, including voice coding, compression, packing and packet switching, and voice quality assurance and the echo cancellation technology.
CDMA2000Analyzer_UM
- CDMA 2000 Protocol Analyzer 是广大无线通信工作者必备的工具之一。如何操作仪器和了解CDMA2000 协议，该文档提供了一个窗口。- CDMA 2000 Protocol Analyzer can be used to analyze and view protocols across A1 (between Base Station Controller and Mobile switching Center), A3 and A7 (between two Base
Internetworking-3_WANs(zslcn)
- 本章介绍了用于WAN(广域网)环境的各种协议和技术。在这里概述的题目包括点对点链路，电路交换，分组包交换，虚电路，拨号服务，和WAN设备。在手册第3部分,‘WAN协议’,的各章里将更详细地讲述专门技术。 - This article introduces the various protocols and technologies used in wide-area network (WAN) environments. Topics summarized here incl
10-Circuit-packet
- Circuit packet switching
broadbandpacketswitchingTechnologies
- The effective design of high-speed, reliable switching systems is essential for moving the huge volumes of traffic and multimedia over modern communications networks. This book explains all the main packet-switching architectures, including all theor
GPRS
- GPRS是通用分组无线业务（General packet Radio Service）的英文简称，是在现有的GSM系统上发展出来的一种新的分组数据承载业务。GPRS与现有的GSM语音系统最根本的区别是，GSM是一种电路交换系统，而GPRS是一种分组交换系统。因此，GPRS特别适用于间断的、突发性的或频繁的、少量的数据传输，也适用于偶尔的大数据量传输。这一特点正适合大多数移动互联的应用。 -GPRS is General packet Radio Service (General packet
wsn-papers
- In this paper, we propose an effective end-to-end virtual path construction system, which exploits path diversity over heterogeneous wireless networks. The goal of the proposed system is to provide a high quality live video streaming service
Difference-Between-GSM-and-GPRS
- The difference between GSM and GPRS. GPRS is the feature used in GSM for packet switching network applications.
zxj10-sdh-voip
- ZXJ10局用数字程控交换机具有长话、市话或长市合一功能。ZXJ10具有强大的组网功能，在电信交换网中可以作为端局、汇接局、长途局、关口局来使用，还可以作为独立的STP或综合的STP来使用，另外还可以作为PBX来使用。ZXJ10既可以建立单模块局，也可以建立多模块局。母局与各交换模块间可以采用高速光纤连接。可以采用多种速率的内外置式PDH和SDH设备进行组网。组成PDH、SDH或二者混合的各类环形网、链形网、树形网络及混合形的网络。 传统的电话网紧电路交换方式传输语音，所要求的传输宽带为64
New-WinRAR-ZIP-archive
- Optical burst switching (OBS) is an optical networking technique that allows dynamic sub-wavelength switching of data. OBS is viewed as a compromise between the yet unfeasible full optical packet switching (OPS) and the mostly static optical circuit
SoftswitchpacketProtocolBasis_H323
- H.323是由ITU制定的通信控制协议，用于在分组交换网中提供多媒体业务。呼叫控制是其中的重要组成部分，它可用来建立点到点的媒体会话和多点间媒体会议。H.323定义了介于电路交换网和分组交换网之间的H.323网关（GateWay）、用于地址翻译和访问控制的网守（GateKeeper）、提供多点控制的多点会议控制器（MC）、提供多点会议媒体流混合的多点处理器（MP），以及多点会议控制单元（MCU）等实体-Developed by the ITU H.323 is a communication c
packet-and-Circuit-switching
- packet and Circuit switching for engineer
ldpc_cc
- Low-density parity-check convolutional codes offer the same good error-correcting performance as low-density parity-check block codes while having the ability to encode and decode arbitrary lengths of data. This makes these codes well suited
CS & PS
- Intro to CS and PS and diference between them