In the field of performance metrics and measurements of SIP (Session Initiation Protocol)
Proxy and B2BUA (Back-to-Back User Agent) no standardized methodology has been …

Speech quality assessment is one of the key matters of voice services and every provider
should ensure adequate connection quality to end users. Speech quality has to be …

This paper deals with new proposal of a speech quality monitoring tool based on the
perceptual evaluation of speech quality in accordance with ITU-T P. 862 and its application …

Abstract VoIP (“Voice Over Internet Protocol”) is the transmission of voice communication
through the Internet via IP-based telephony networks. VoIP has become very popular over …

PSTN system has been implemented in a wide variety of structures with multiple protocols,
codecs, software and hardware–based distributions. The use of cryptographic techniques let …

For implementation of layer 3 connectivity, it is possible to use multiple vendor equipments
with hardware and software based solutions. Performance results between close source and …

流媒体同步对端到端时延和时延抖动提出了确定的要求, 而终端抖动缓存一方面能消除时延抖动
的影响, 一方面却增加了端到端时延, 流媒体同步保障对网络时延的要求不明确 …

The paper deals with the contact centers with the emphasis on traffic analysis, monitoring of
significant parameters and way of modeling of this traffic during contact center design. The …

The paper deals with a speech quality monitoring tool which we have developed in
accordance with PESQ (Perceptual Evaluation of Speech Quality) and is automatically …

Issues around Quality of Service (QoS) and security for Voice over IP (VoIP) have been
extensively investigated separately, due to the great attention this technology currently …