An emerging killer application for enterprise wireless LANs (WLANs) is voice over IP (VoIP) telephony, which promises to greatly improve the reachability and mobility of enterprise telephony service at low cost. None of the commercial IEEE 802.11 WLAN-based VoIP products can support more than ten G.729-quality voice conversations over a single IEEE 802.11b channel on real-world WLANs, even thou...

For Internet Telephony to be a viable alternative to the Public Switch Telephone Network (PSTN), efficient and high quality communications are required. This paper proposes an optimization algorithm that selects parameters like coding scheme, packet loss bound, and maximum link utilization level in a Voice over IP (VoIP) network. The goal is to deliver guaranteed Quality of Service (for voice) ...

The objective of this research paper is to provide brief overview on simulative investigation on VOIP over WiMAX communication network for static environment. The mobile WiMAX (IEEE802. 16e) support VOIP traffic under different scenario, QOS, the system throughput, the packet delay,the signaling overhead,various design choices and performance analysis. This paper reports about the various VOIP ...

The Voice over Internet Protocol (VoIP) is increasing in popularity as a cost effective and efficient means of making telephone calls via the Internet. However, VoIP may also be an attractive method of communication to criminals as their true identity may be hidden and voice and video communications are encrypted as they are deployed across the Internet. This produces a new set of challenges fo...

Voice over IP (VoIP) is rapidly changing the way we use the telephone for voice communications. The term "Voice over IP" defines the transport of VoIP‐based networks, including the signaling and streaming protocols as well as describing the codecs. VoIP is widely used by all kinds of consumers ranging from computer enthusiasts who are excited to get free long‐distance calls over the Internet to...

The introduction of VoIP telephony raises concerns about current regulatory practice. Access regulation has been designed for PSTN and the liberalization of the PSTN market. This paper explores the effects of access regulation of PSTN networks on consumers’ adoption of a new technology in the form of VoIP. It also discusses the link between access regulation and the incentives to invest in VoIP...

This paper presents technology for monitoring and assessment of network QoS parameter for Voice over IP (VoIP) applications in inter-domain environment. The technology is based on automated analysis and description of structures (patterns) of QoS parameter behaviour impacting the VoIP quality: “Quality impairment” patterns, i.e. “outliers” of network delay and packet loss, which predict degrada...

VoIP applications are emerging today as an important component in business and communication industry. In this paper, we address the intrusion detection and prevention in VoIP networks and describe how a conceptual solution based on the Bayes inference approach can be used to reinforce the existent security mechanisms. Our approach is based on network monitoring and analyzing of the VoIP-specif...

VoIP is a relatively new technology. Current research suggests that firms are using VoIP technology to cut costs, to improve productivity, and the firm’s strategic position. The literature is rich with “how to” articles and a discussion of possible benefits, costs, and implementation barriers. But, very few academic studies exist. The purpose of this study is to identify and present the issues ...

Monitoring call quality in a Voice over IP (VoIP) environment has great importance to collect information about those calls on the network. Packet loss on the network and de-jitter buffer, delay and subjective speech evaluation using the E-Model will enable the manager to verify the quality of calls. This article proposes the development of an agent to implement objects with statistical data ab...