Definition of VoIP
What is VoIP?
IP Telephony, also called 'Internet telephony', is the technology that makes it possible to have a voice conversation over the Internet or a dedicated Internet Protocol (IP) network instead of dedicated voice transmission lines.
|
|
VoIP
|
|
Systm Episode 5 - An Explanation of Asterisk47 min 30 sec
Kevin Rose is joined by John Todd, a well known, leading Asterisk expert, to introduce you to the amazing VoIP (Voice over IP) world of Asterisk, the open source voip telephony toolkit. In this episode, Kevin and John take you through the installation and configuration of this powerful tool, and show how it can be used to give anyone complete control over their phone experiences, such as voice over wifi, eliminating phone costs, choosing from hundreds of VoIP providers, creating your own voicemail and menus, and numbers that follow you..just to scratch the surface.
Watch the Video
|
Understanding VoIP- Voice Over IP Part 17 min 25 sec
Watch the Video
|
Lab Rats - VOIP Demystified13 min 40 sec
Andy and Sean give you the scoop on voice over IP using gadgets and a few flying eggs.
Watch the Video
|
Securing VoIP Devices
This whitepaper discusses the security challenges posed by voice over IP (VoIP) communications in wired and wireless devices such as VoIP servers, gateways, telephones, and mobile handhelds. The author describes a number of techniques that can be used by developers to help protect VoIP devices from security breeches. The paper is from Certicom, which markets Security Builder toolkits to embedded Linux developers.
Read the Article
|
Making the Case for VoIP
For AT&T, deploying VoIP across our own company has resulted in employee productivity improvements and compelling cost savings in capital investment and operations. By keeping a focus on quality while leveraging leading edge technology, AT&T has been able to realize financial paybacks that have helped to accelerate VoIP deployment. AT&T went through rigorous steps to identify and prioritize locations where VoIP would provide the most benefits initially, followed by a migration plan that will deliver these benefits throughout the entire company. This paper will take you through AT&T's experience and show you the elements that created a winning business case.
Read the Article
|
Voice over IP Security
With an understanding of VoIP technology and its benefits in place, let's consider the security ramifications. In the process of saving money and increasing efficiency, two crucial portions of any infrastructure, voice and data, were combined. Suddenly, an IT staff is not responsible for securing only standard servers (database, mail, web), workstations and routers. As if these data security concerns weren't enough, VoIP servers acting as gateways, special routers, phones, new protocols and operating systems are now thrown into the mix. The burden of voice and telecommunications security has been shifted from the carrier to the IT team. It has moved from an obscure PSTN, to an IP network every cracker is familiar with. Let's examine the risks and how you can mitigate them.
Read the Article
|
Fine Tuning Voice over Packet Services
Many industry analysts estimate that the overall VoIP market will become a multi-billion dollar business within three years. While many corporations have long been using voice over Frame Relay to save money by utilizing excess Frame Relay capacity, the dominance of IP has shifted most attention from VoFR to VoIP. Voice over packet transfer can significantly reduce the per-minute cost, resulting in reduced long-distance bills. In fact, many dial-around-calling schemes available today already rely on VoIP backbones to transfer voice, passing some of the cost savings to the customer. These high-speed backbones take advantage of the convergence of Internet and voice traffic to form a single managed network.
Read the Article
|
Four ways to do VoIP
A do-it-yourselfer's guide to installing voice over IP on your enterprise network. A voice-over-IP gateway can be loosely defined as a mechanism that takes circuit-switched voice from a traditional PBX, converts it to IP and transfers it across a LAN or WAN to another gateway where it is reconstituted back Gateway functionality can be obtained through stand-alone boxes, modules or chassis cards for proprietary boxes; also expandable routers or software and expansion cards for Windows NT servers.
Read the Article
|
Building Voice over IP
Regardless of what's in between, a phone conversation between two people requires that each has both a microphone and a speaker. In the traditional telephone, the microphone is located in the mouthpiece and the speaker is located in the earpiece. In an analog telephone (like the one you have at home), the voice signal produced by the mouthpiece is sent directly along the wire to a telephone exchange or a local PBX.
Read the Article
|
Voice Design and Implementation Guide
Features within a telephone switching machine (such as Centrex) allow for the use of a custom 5-digit dial plan for specific customers who subscribe to that service. Private branch exchanges (PBXs) also allow for variable length dial plans containing three to 11 digits. Dial plans contain specific dialing patterns for a user who wants to reach a particular telephone number. Access codes, area codes, specialized codes, and combinations of the numbers of digits dialed are all a part of any particular dial plan.
Read the Article
|
|
|
Page: 1 2 3 4 5 6 7
Members currently browsing this category:
|
|
