Telecommunications at home is changing rapidly. Many people have moved from the traditional PSTN phone to the mobile phone. Now for increasingly many people Voice-over-IP telephony on a PC platform is becoming the primary technology for voice communications. In this tutorial paper we give an overview of some of the current trends and try to characterize the next generation of home telephony, in...

This paper intends to introduce the development of a terminal agent for QoS measurement that is suitable for an NGN environment, and to summarize the results of its performance test. Using the terminal agent for service quality measurement, it is possible to measure the QoE-based end-toend service quality of voice phone, video phone, and VoD services. In addition, the terminal agent, installed ...

* These authors contributed equally to this work Correspondence should be addressed to: Prof. Nancy Y. Ip, Department of Biochemistry, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China. Phone: 852-2358-7304 Fax: 852-2358-2765 E-mail:[email protected] Running title: LIFR signaling inhibits neurite outgrowth

VoIP (Voice over IP) over mesh networks could be a potential solution to the high cost of making phone calls in most parts of Africa. The Village Telco (VT) is an easy to use and scalable VoIP over meshed WLAN (Wireless Local Area Network) telephone infrastructure. It uses a mesh network of mesh potatoes to form a peer-to-peer network to relay telephone calls without landlines or cell phone tow...

Voice/Video over IP (VoIP) systems to date have been either highly centralized or dependent on the IP multicast in nature. Global Multimedia Collaboration System is a scalable, integrated and service-oriented VoIP conferencing system, based on the XGSP collaboration framework and NaradaBrokering messaging middleware. This system can provide media and session services to heterogeneous endpoints ...

We describe the WebSIM, an approach that integrates GSM SIMs into the Internet. The underlying idea is to implement a Web Server inside a SIM, and to allow for transparent access to it from the Internet. The contribution of our approach is that a SIM, which is currently a security module (smartcard) fitted in a GSM mobile phone, becomes also a personal security server in the Internet. Like any ...

The Session Initiation Protocol is increasingly used as a signaling protocol for administrating VoIP phone calls. Careless configuration of the SIP protocol is known to lead to a large set of attacks. SIP can be configured in several ways so that different functional and security requirements are met. Tools exist for attacking Voice over IP protocols, yet most tools target the message traffic as-

VoIP(Voice over IP), so called Internet phone, provides several unique advantages, for instance, inexpensive long distance call service than the existing wire telephone network and various multimedia services from Internet network added to voice call service. This has been widely discussed and has been a research topic throughout the developed countries in the recent years. The paper is intende...

Voice over Internet protocol (VoIP) represents a major newish trend in telecommunications and an alternative to traditional phone systems. VoIP uses IP networks and therefore inherits their vulnerabilities. Adding voice traffic to IP networks complicates security issues and introduces a range of vulnerabilities. A VoIP system may face either an exclusive attack or an attack to the underlying IP...

In this paper, we consider the mobility management in large, hierarchically organized multihop wireless networks. The examples of such networks range from battlefield networks, emergency disaster relief and law enforcement etc. We present a novel network addressing architecture to accommodate mobility using a “Home Agent” concept akin to mobile IP. The performance of the mobility management sch...