voip service quality measuring and evaluating packet-switched voice

... as notions of voice services, measurement and evaluation of quali- ty of voice service, and differences in implementation and performance between packet- and circuit-switched voice services. Although ... packet-switched voice services with respect to the audible quality of voice and naturalness of the exchanges. It describes commonly used techniques for measuring a...

Ngày tải lên: 01/06/2014, 12:09

... TESTBED FOR EVALUATING VoIP SERVICE1 A new service must be prototyped and tested in a laboratory environment before massive deployment. This allows objective and subjective evaluation of the service ... 2001), and Siemens (www.siemens. com, 2001) manufacture ISDN BRI and analog and digital phones. We use the BRI phones from Lucent and Siemens, and digital and analog...

Ngày tải lên: 30/09/2013, 07:20

... near-end talker’s voice destined for transmission back to the far end. 54 CRITERIA FOR EVALUATING VoIP SERVICE Voice Packet Loss VoIP uses UDP to transport RTP-encapsulated voice frames. Therefore, ... experimented with and rede- signed to support data, voice, and video services. Therefore, when multiple data- and graphic-sharing sessions are in progress in an IP network,...

Ngày tải lên: 30/09/2013, 07:20

... professional services provider with multiven- dor experience, nationwide resources, pre-assembly and test capabilities, and a broad range of on-site services to ensure the best possible quality in both ... mitigate the impacts of component failures as well as ensure uniform service quality. ENSURING WIRELESS AVAILABILITY AND SERVICE QUALITY WITH DUAL DATA CENTERS CASE STUDY ....

Ngày tải lên: 04/11/2013, 13:15

... giải pháp nhằm nâng cao chất lƣợng dịch vụ VNPT’s IPTV Implementation in Hanoi and Solutions to Improve Service Quality NXB H. : ĐHCN, 2012 Số trang 110 tr. + Lại Long Hải Trƣờng Đại ... bày cho ngƣời thực hiện đánh giá. Phương pháp đánh giá QoE khách quan: MPQM (Moving Picture Quality Metrics) và V-factor là 2 mô hình để đánh giá QoE của dịch vụ IPTV. MPQM không cần...

Ngày tải lên: 26/11/2013, 20:44

... prioritized service quality dimensions and their affections on increasing/decreasing service quality gaps. In the following, after a brief review of the service quality concept, the model of service quality ... are wider service organization agendas than simply service quality: improving access to existing services; equity and equality of service provision; provi...

Ngày tải lên: 23/12/2013, 02:16

Ngày tải lên: 18/02/2014, 11:20

... article: Measuring and Man- aging Project Quality. Measuring and Managing Project Quality; Stacy Goff, page 3 © 2008 Stacy Goff, PMP, ProjectExperts; published at www.asapm.org, and at ... needs, and even then, teams seldom know how to meas- ure the quality of the project delivery until it is too late. What Is Quality? To cite Lew Ireland’s choice of definitions, Q...

Ngày tải lên: 07/03/2014, 00:20

... high-performance network services is an understanding of the performance characteristics of the service as perceived by the client population as a whole. Understanding and measuring such end-to-end service performance ... complex services across a diverse and rapidly changing client population. In a competitive landscape, such understanding is critical to continually evolving and...

Ngày tải lên: 23/03/2014, 03:20

Ngày tải lên: 23/03/2014, 05:23