Comparative Analysis of Internet Telephony Gateways
IP telephony, while still relatively new, is poised to revolutionize corporate telecommunications by at last enabling users to haul voice and data traffic over a single wide area network. International Data Corporation, predicts that the Internet telephony market will grow from US $3.5 million in 1995, to US $560 million 1999. Meanwhile, Tarifica in the UK estimates that AT&T will to lose between US $620 million and US $950 million in international calls to the Internet by 2001.
The problems with telephone systems as they are today, are getting increasingly higher for long distance phone class. Imagine even local ISP's (Internet Service Providers) offering such low rates as $.02 a minute phone calls from Rapid City to Sioux Falls.
The idea behind IP telephony is enticingly simple, convert voice into packets for transmission over a company's TCP/IP network. Although simple in principle, IP telephony presents some tough technical hurdles for vendors to surpass. This report will provide readers with a comparative analysis of the IP telephony products currently on the market, or scheduled to ship that will help you understand the significance of incorporating this technology for the benefit of the consumers.
Introduction
The basic concept behind IP telephony is deceptively simple: convert voice into a series of packets, and transmit them across an IP network to be reassembled on the receiving end. While theoretically simple, IP telephony designers face a number of technical challenges, many of them similar to those encountered in designing a digital cellular network. These challenges make designing a good IP telephony gateway a significant undertaking.
V...
... middle of paper ...
...
The promise of IP telephony has attracted vendors from across the industry - companies specializing in voice processing, data communications, and startups. These vendors have met the technical challenges of IP telephony with a variety of architectural solutions. Although new products for IP telephony are announced on an increasingly frequent basis, the concepts presented here will serve as a framework to help evaluate the IP telephony market and select a solution that serves your needs.
Bibliography:
Engst, Adam C., Corwin S. Low, and Michael S. Simon. Internet Gateway Starter Kit.
Indianapolis: Hayden Books, 1994.
Kehoe, Brendan P. Zen and the Art of the Internet, An Advanced Guide to the Internet.
Online edition. First Edition, 1992.
Stein, Michael and Gary Wolf. Aether Madness, An Offbeat Guide to the Online World.
Online edition, 1995.
“Because this technology uses bandwidth more efficiently than a traditional network and has not been subject to traditional telephone industry regulation.” (AT&T INC, 10-K, 2014: 3)
Cisco Designs, manufactures, and sells Internet Protocol (IP) - based networking and other products related to the communications and information technology (IT) industry and provide services associated with these products and their use. The company provides products for transporting data, voice within buildings, across campuses and globally. The products are utilized at enterprise businesses, public institutions, telecommunications companies and other service providers, commercial businesses, and personal residences. Cisco conducts its business globally and manages its business geographically. Its business is divided into the following three geographic segments: The Americans; Europe, M...
SIP is the application layer control protocol of VOIP which is used for creating ,modifying and terminating a sessions with one or more than one participants.it is a client server protocol, in which client generates a requests and sends it to the server and server process the requests and send it back to the client. SIP provides various services such as User location, User availability, user capability, call setup, call handling.
The major savings were planned through the convergence of the voice traffic over the IP data network. The first step in that plan was to build a global network that supports the Quality of Service (QoS) necessary for VoIP traffic. Since the primary partner in this project is Cisco System, which supports VoIP through their range of products called Architecture for Voice, Video, and integrated Data (AVVID), the design is largely reliant on this technology (Cisco AVVID, 2002). The network consists of a switched core that delivers multiple megabytes of bandwidth to a ...
The main advantage of using this system is that is supports voice over IP (VoIP) services such as IP-Centrex. IP Centrex is a service that provides a single broadband access point to a company. The company can use this access point to broadcast packets of voice data. When no voice data is present, more bandwidth is available to other uses of the company. This results in saved money to the company because dedicated phone lines are not needed.
Welcome to the deployment of voice over IP or VOIP. This paper will explain the advantages and the disadvantages of using VOIP. The quality of service or QoS will be discussed. Security problems and solutions for IP telephone systems and networks. The basics and many protocols will be discussed. The voice clarity considerations will be discussed. Business 911 requirements for VOIP phone systems. The end-to-end VPN’s versus firewall-based VPNs.
Telecommunications gained mainstream attention in the early 90’s; however the initial key market was business men and women, who used their phones whilst being on the move and so allowing them to communicate with their companies with ease. Though in the modern era, telecommunication went through segmentation in the market trends, and now in this day and age it would be difficult to find someone who does not own some form of mobile technology. Many phone providers battle to provide the best service for their customers (Figure 1).
VoIP helps develop your CRM (customer relationship management) strategy and enlarge client loyalty, enhance operating competence and boost sales in addition to noticeable savings from eliminating long-distance tolls. Call center systems will reach 30% of total VoIP revenues, which is projected to be $1.4 billion. The merging of PSTN voice and data replaces the telephone switch with IP based software, which simplifies infrastructure and reduces cost. An IP call center is both economical and easy to install. Companies with multiple call centers have these advantages are amplified. Rise in Internet use required companies to furnish call centers with ways to reply to the various ways customers call in to the center. Challenges for companies include providing a reliable yet familiar forum for customers not matter what means of communication they may use. One solution is media blending software that merges Internet capabilities like wireless, e-mail, chat and video with the voice of sales and service representatives. A developed Voice over IP based CRM perform functions like how contacts are queued and routed, identify and segment customers based on value to business, integrate front and back office systems for consistent view, synchronizing key information, customer history, and business workflow. When selecting a vendor look at their track record, find out if they have necessary experience and knowledge for your requirements.
International analysts predict that the demand for appropriate equipment will increase rapidly in the coming few months. After the online boom in 1990's WAP will be the next growth industry of the twenty-first century. The conditions seem to be ideal: The consumers' interest in online services and e-commerce does not stop to show an upward trend. For the time being there are worldwide several millions of persons using mobile phones, their number is still growing. WAP is based on GSM technology, the worldwide most used mobile phone system that has turned out to be the standard on all continents. (only in the USA there are more systems competing with GSM).
“The Net’s beginnings went largely unnoticed by the public. For all its technological brilliance, the Internet of today is far removed from the concepts that propelled initial research. And the Internet’s story- which has become the World Wide Web’s story- has not been so much one of planned development as of individual genius, at least until recently.” (Gilster. 1997).
In the past few years the use of mobile phones has increased tremendously. At one time only available to the rich and elite business executives, the luxury of mobile phones can now be used by a wide group of people in different financial situations. Mobile phones are a necessary convenience. They provide instant communication access wherever mobile phone service is offered. There are two options for mobile phone service: analog, and digital PCS. Analog is the more expensive option and has long been the standard for mobile phone service. Digital PCS is the newest form of phone service. It works by converting human speech into software codes and converting them to audio signals before the codes reach the listener. Because it is software based it provides a perfect platform for a variety of advanced wireless features. Digital PCS is the future of mobile phone service and the soon to be de facto standard for wireless phone service.
Since its inception, the telephone has become one of the most important inventions of all time. Although some were skeptical about its replacement over telegrams, in the end the advent of this fine communication equipment has won the hearts of many. As a matter of fact, the telephone system had come to numerous facelifts that it literally connected the world before the internet was born. Because of its importance, homes and businesses can not live without it. In the U.S. alone, most if not all have a phone in the house.
Making a telephone call no longer should conjure up visions of operators connecting cables by hand or even of electrical signals causing relays to click into place and effect connections during dialing. The telephone system now is just a multilevel computer network with software switches in the network nodes to route calls get through much more quickly and reliably than they did in the past. A disadvantage is the potential for dramatic and widespread failures; for as has happened.
The solution became visible to computer engineers, they must come up with a communication system that would not fail even if sections of it...