This document gives an overview of Voice Over ATM/Voice Telephony Over ATM (VTOA). It concentrates on various design considerations that need to be addressed while setting up a voice supporting ATM network. It discusses the standards that are getting evolved thanks to the works of ATM Forum. The document ends with brief description of some of the products currently available for VTOA. See Also:...

It has been suggested in voice over IP that an appropriate choice of the distribution used in modeling the delay jitters, can improve the play-out algorithm. In this paper, we propose a tool using which, one can determine, at a given instance, which distribution model best explains the jitter distribution. This is done using Expectation Maximization, to choose amongst possible distribution mode...

In the last few years an increasing amount of attention has been paid to technologies for the transmission of voice over IP (VoIP). At present, the UDP transport protocol is used to provide this service. However, when the same bottleneck link is shared with TCP flows, and in the presence of a high network load and congestion, UDP sources capture most of the bandwidth, strongly penalizing TCP so...

A voice over IP quality monitoring architecture based on the development of the VQuality library is described. VQuality implements the E-model and its extensions for objective voice quality measurement. The library also supports generation of a customized voice quality CDR with extensions that permit transfer of call quality parameters measured over different instants of time, besides interacti...

Users of Voice over IP (VoIP) applications are sensitive to the quality of an ongoing call. We hypothesize that the quality of a VoIP session can be estimated from the first few seconds of the session and this can be generalized to other VoIP calls. Our approach is an in-band probing mechanism and does not require any external monitoring schemes or network support. We show by post processing Vo...

The use of IP to transport voice is receiving signiicant attention in the telecommunications and data networking industries. Commonly known as Voice-over-IP (VoIP), this technology has the potential to allow user communication involving multiple media types, and between terminals that ooer improved capabilities and user interfaces. Meanwhile there has been explosive growth in the demand for wir...

This article concentrates in the issues of network dimensioning for voice over IP (VoIP). The network under dimensioning is an IP network between VoIP user devices. First, a short introduction to VoIP in general is given. Second, the issues in network dimensioning for VoIP are identified. Third, bandwidth requirements of VoIP are calculated. Fourth, basic approaches to Quality of Service are di...