The first step for the integration of multimedia traffic within the Internet is the provision of voice services, both traditional POTS (Plain Old Telephony Services) and innovative, like multi-party audio conferences or high quality audio. Voice services in Internet are broadly indicated as VoIP (Voice over Internet Protocol), including all possible services that can be built on vocal interacti...

This letter proposes an efficient uplink scheduling algorithm for the voice over Internet protocol (VoIP) service with variable frame-duration according to the voice activity in IEEE 802.16e/m systems. The proposed algorithm dynamically changes the grant-interval to save the uplink bandwidth, and it uses the random access scheme when the voice activity changes from silent-period to talk-spurt. ...

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract The new technology has the ability to transmit a voice over Internet protocol process networks by using an Asterisk PBX.In present day companies are implement to produce a different VoIP products to many features in market.This paper aim is introdu...

Voice-over-IP (VoIP) is one of the main applications or services, which dramatically increased the spread and usage of the Internet. VoIP describes the transmission and reception of voice and video data over networks that use the “internet protocol” (IP) as transport protocol. With the use of VoIP within company networks (intranet) investors hope to reduce the expenses for infrastructure and ma...

Mobile Internet Protocol (MIP) is a standard protocol that allows users to maintain nonstop connectivity with their home IP addresses regardless of physical movement. In this paper, we give an overview of Mobile IP: terminology, functionality, and operation. Comprehensive surveys on Mobile IP issues are discussed: Quality of Service (QOS), Multicast, Security, Voice, and TCP over Mobile IP. The...

Voice-over-Internet protocol (VoIP) is an emerging technology that is beginning to replace traditional telephone services because it is much more cost effective for the consumer and businesses. Long distance charges are relatively a thing of the past, and in general there are more feature-rich services available over a VoIP line than traditional phone services. VoIP provides phone services with...

This paper summarizes the results of a study that explored the security implications of the use of “disruptive technologies” in various economic sectors. Robust evidence of the security challenges associated with deploying advanced technologies was gathered by bringing together internationally-renowned experts with firsthand experience involving major case studies. Policy recommendations in the...

We discuss techniques for Voice Activity Detection (VAD) for Voice over Internet Protocol (VoIP). VAD aids in saving bandwidth requirement of a voice session thereby increasing the bandwidth efficiently. In this paper, we compare the quality of speech, level of compression and computational complexity for three time-domain and three frequency-domain VAD algorithms. Implementation of time-domain...

The Session Initiation Protocol (SIP) is an internet protocol for establishing sessions between two or more parties. It is becoming ubiquitous in uses such as Voice over IP, instant messaging, Internet TV, and others. The Java community has even provided a standardized API so that SIP applications can now be built within J2EE application servers. These new capabilities also bring with them new ...

We discuss techniques for Voice Activity Detection (VAD) for Voice over Internet Protocol (VoIP). VAD aids in reducing bandwidth requirement of a voice session thereby using bandwidth efficiently. Such a scheme would be implemented in the application Layer. Thus the VAD is independent of the lower layers in the network stack [3]. In this paper, we compare four time-domain VAD algorithms in term...