51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Sunday, December 7th, 2008 at 17:29 | No comments

Categories: Communication Networks

Tags: AT75C220, gateway, IP telephone, VoIP

Short Content: Picking   Wanting: This article proposed from the application angle one kind of new local area network IP telephone's software and hardware design proposal, namely takes the hardware platform by at75C220 development board, uses H.323 under the mClinux operating system the agreement stack development local area network IP telephone terminal, and has enumerated some highly effective processing method to the realization key question.Key word: IP telephone; Gateway; Real-time operating system; High-level simplification set of instructions computer;　　Foreword　　Because the computer network technological ...

Wednesday, November 19th, 2008 at 18:32 | No comments

Categories: Communication Networks

Tags: IP-PBX, VoIP

Short Content:     At present, the numerous enterprises along with the service expansion, have opened the massive Branch office, between such enterprise total Branch office as well as Branch office's pronunciation communication is very frequent, the enterprise long-distance telephone call expense is in an enterprise cost of operation huge expenditure. Now the Internet has been popular, nearly each enterprise and the Branch office have the Internet turning on. Therefore draws support from the existing Internet to realize the network telephone, helps the ...

Monday, October 27th, 2008 at 13:50 | No comments

Categories: Communication Networks

Tags: arranges the decoding, DSP, VoIP, XScale

Short Content: Abstract: This article introduced briefly based on the IXP421 pronunciation gateway's system structure, as well as pronunciation DSP module principle of work. In system not special-purpose pronunciation DSP, but realizes by the IXP421 XSCALE nucleus. The system software, the application software and pronunciation DSP shares the CPU time. Pronunciation handling ability will receive the encoding method and the CPU load restriction, therefore, this article stated through the actual system's test result to Intel Corporation the performance index has carried on ...

Sunday, October 19th, 2008 at 05:45 | No comments

Categories: Communication Networks

Tags: VoIP

Short Content: Introduction     In recent years, Internet obtained the swift development and the popularization application, but takes its core technologies the IP agreement system to obtain the widespread approval in the data net construction dominant status. At the same time, along with based on the IP technology in each kind of applied technology's statement, VoIP technology's statement, caused the data net correspondence gradually to integrate the traditional voice feature domain particularly.    VoIP (Voice over IP) is named the IP telephone (Internet ...

Friday, October 17th, 2008 at 02:14 | No comments

Categories: Communication Networks

Tags: VoIP

Short Content:    Abstract: The IP network telephone technology (VOIP) took one kind to synthesize the traditional telecommunication network and the computer network characteristic technology already knew very well for the people. The USB network telephone is the black eyebrow coloring helps in the computer platform, provides one kind new, the user-friendly network telephone service terminal device. It through namely inserts the USB connection which and the computer namely uses is connected, realizes in the Internet from the computer network connection the ...

Thursday, October 16th, 2008 at 21:47 | No comments

Categories: Communication Networks

Tags: VoIP

Short Content: Author Email:  hongxinglu600010@sina.com First, introduction Along with the Internet technology's unceasing development, a powerful competitor who VoIP (Voice over IP) the technology already became the voice communication area of technology. VoIP is realizes the voice communication technology using the network as the transmission carrier, the ether telephone is take VoIP as the voice communication terminal which the foundation realizes. zai weilai di ji nian nei, the IP telephone will certainly to occupy in the telecommunication market the pivotal status, ...