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How Does IP Telephony Work

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How Does IP Telephony Work

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Home Page > Computers > How Does IP Telephony Work

How Does IP Telephony Work

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Posted: Apr 21, 2009 |Comments: 0

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IP telephony refers to the system of transmitting voice over a data network such as in broadband Internet connection. In comparison to the traditional analogue phone line, as an extension to the practical Internet applications, it presents a cheaper and more accessible option to communicating with people from any part of the world. With its call sound quality that is comparable and sometimes better that that observed in analogue telephone conversations, it presents a modern and improved system for call management having total flexibility in using and locating phone numbers.

IP telephony, broadband telephony or Voice over Internet Protocol (VoIP) applications is operated over the Internet through packets of switched network. It introduces a system of voice transmission that carry telephony signals as digital audio, which reduces data, rate through speech data compression methods. It encapsulates the digital audio signals into the data packet stream over the IP. In sense, as a particular call is made, the conversation is broken down into tiny packets for faster and clearer transmission, which is then reassembled at the receiving end. One common misconception about IP telephony is that it needs to access a computer to operate. That is not the case; however, it does need a broadband Internet connection to operate.

A VoIP service usually comes in two types of public switched telephone networks (PSTN), the access numbers and the direct inward dialling (DID). In access numbers service, the caller is required to have the extension number of the person called through VoIP. It needs to key in the extension number of the person being contacted. On the other hand, DID presents more convenient and direct solutions to callers; it does not need codes or extension numbers to contact another VoIP user. The great thing about these services is that they provide solutions to the difficulties encountered in implementing traditional PSTN calls.

Through Internet lines, VoIP services connect people in a number of ways:

Computer to computer applications is perhaps the easiest way of availing VoIP services for free, no matter the distance. There are also companies that offer free and very low long-distance call fees. All it needs is a computer with a microphone, speakers, sound card and Internet connection that also runs software that supports VoIP applications.

Computer to telephone VoIP calls, similar to computer-to-computer calls, requires a software client. It allows a person to call anyone from his computer. While the software usually available for free, the calls may require minimal fees. Call rates depend on the software provider or on the VoIP service setup provider.

Telephone to computer calls is now made possible. Today, a number of companies are providing special numbers and calling cards, which enable phone users to call a computer user. However, the computer needs to have a vendor’s software installed but is a lot cheaper than making traditional phone-to-phone long-distance calls.

Even telephone-to-telephone calls are possible with VoIP. By using the gateways, anyone can easily and directly contact any standard phone in the world via IP-based network.

The practicality, accessibility, value and ease of use of IP telephony or VoIP services are increasingly gaining popularity. Today, more and more businesses and companies are installing and using IP telephony systems. Time will only tell on when with IP telephony or VoIP services find their way into today’s modern homes.

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Derek Rogers -
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Derek Rogers is a freelance writer who writes for a number of UK businesses. For information about Voice and IPT Solutions, he recommends Prodec Networks, a leading supplier of IP Telephony.

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Derek Rogers is a freelance writer who writes for a number of UK businesses. For information about Voice and IPT Solutions, he recommends Prodec Networks, a leading supplier of IP Telephony.

Affordable IP PBX Telephone Systems

admin — Mon, 15 Nov 2010 16:24:26 +0000

Affordable IP PBX Telephone Systems

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Home Page > Technology > VoIP > Affordable IP PBX Telephone Systems

Affordable IP PBX Telephone Systems

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Posted: May 05, 2010 |Comments: 0

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Affordable IP PBX Telephone Systems

By: John Steven

About the Author

IP PBX Telephone System – AccessDirect provides IP hosted PBX system with many advanced features including auto attendant, fax mail, voice mail etc.

(ArticlesBase SC #2301207)

Article Source: http://www.articlesbase.com/ – Affordable IP PBX Telephone Systems

An affordable IP PBX telephone system makes it possible for the telecommunication requirements of small and medium-sized business organizations to be resolved efficiently without making huge capital investments. Going in for a hosted state-of-the-art IP PBX system helps the company to concentrate on its core business.

Innovative Technology Minimizes Expenses

By setting up a reliable and affordable IP PBX telephone system, the telecommunication expenses of your business can be reduced significantly. As the IP PBX system is managed by the service providers, it is not necessary to install PBX hardware in the company’s office. The service providers maintain the equipment at their site and offer PBX functions using broadband Internet or telephone networks at reasonable monthly rents.

IP PBX systems enable calls to be made to international and local locations at affordable charges. Numerous extensions from an existing telephone connection make business communication easier and cheaper. The company’s business presence can be established anywhere using virtual phone numbers, minimizing the expenses involved in setting up physical offices in different places.

Business organizations do not have to worry about maintaining and upgrading the hosted IP PBX system. When new features are added, the user’s phone system instantly reflects the changes.

Sophisticated Call Handling at Affordable Cost

The IP PBX telephone system has several sophisticated call handling functions, including auto attendant, call forwarding, call conferencing, voicemail, call waiting, voice to email, fax to email, caller ID and automatic call distribution.

An auto attendant functioning as live receptionist receives all calls with recorded salutation messages and offers callers menu options like dial-by-name and dial-by-extension. Calls get instantly routed to the concerned extensions based on the choice of the caller. The auto attendant efficiently manages numerous calls coming in at the same time and performs call transfer without sending out ‘busy’ signals.

With the advanced call forwarding facility, official calls can be answered on personal landlines and cell numbers. The call router enables the caller to leave voice messages in the voicemail box, which may be also forwarded to the receiver’s email account.

The modern and affordable IP PBX telephone system and promotes a successful business image among clients.

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IP PBX Telephone System – AccessDirect provides IP hosted PBX system with many advanced features including auto attendant, fax mail, voice mail etc.

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Voice Over IPv6: Architectures for Next Generation VoIP Networks

admin — Tue, 26 Oct 2010 15:07:57 +0000

Product Description
IPv6 (Internet Protocol version 6) is the future of Internet telephony. And this book is your guide to that future.

IPv6 is the replacement for the currently used IPv4 (Internet Protocol version 4). IPv6 will offer increased IP addresses (full 128-bit addresses, compared to the 32-bit addresses of IPv4), enhanced security, and greater robustness. It will also be fully “backwards compatible” with existing IPv4 systems. These capabilities will finally make Internet telephony a viable competitor to conventional switched telephone networks. In this book, Dan Minoli clearly explains IPv6 and how telephone networks can be built on its foundations.

This is not just another IPv6 book; instead, it focuses on those aspects of IPv6 relevant to Internet telephony systems and voice networks. Minoli uses a compare/contrast approach, exploring where IPv6 is similar to IPv4 and where it differs, to let you quickly grasp the essence of IPv6 and the similariti… More >>

Voice Over IPv6: Architectures for Next Generation VoIP Networks

0800 number voice over IP (VoIP)

admin — Thu, 25 Feb 2010 04:24:35 +0000

Once of the latest technology in data networking is VoIP. The success of VoIP is because of its compatibility with the voice networking over traditional telephone networks and cost advantages as its does not charge per minute over long distance calls. VoIP calls can be placed across the Internet. The best thing about VoIP is that it can be integrated with your 0800 numbers.

VoIP works with a high speed broadband connection, a router and a VoIP gateway. Along with 0800 number, the router sends the telephone calls over an Internet connection. The VoIP gateway converts the analog signals into digital format, which are further broken packets, so that voice data can be transmitted to and from the computer. The biggest advantage of 0800 numbers along with VoIP is that the customers can make calls from Internet connection. With softphones, which is a software application that loads the VoIP services onto the desktop or laptop, you can place VoIP calls to anywhere in the world, through a standard broadband connection.

VoIP services that come along with 0800 number are caller id, call waiting, call transfer, three-way dialing and repeat dialing and features. Additional services such as call filtering, forwarding, sending of calls directly to the voice mail, can also be access with an additional fee. You can also check your voicemail over the web or PDA. With VoIP on 0800 numbers you receive free registration to use other features as well such as Voicemail to Email Service, Fax to Email , Scheduled Dial plan, Call divert, Route to an external provider, Personalize VoIP Accounts, Check VoIP Status etc.

Generally, the VoIP services provided by 0800 number may vary in significant ways. So it is better to check the pros and cons before subscribing it. Also make sure that you have technical support for the possible compatibility on your 0800 numbers.

Talha Khalid

Profits of Using VoIP – Internet Broadband Phone Services

admin — Wed, 23 Dec 2009 22:32:41 +0000

Recently, my neighbor asked me about how to call international long distance with no-minute charge. He also was interested in learning how to lower his home phone bill. I told him about a phone system called VoIP that would benefit his interest. This article is a brief information to introduce VoIP to you.

First, do you know how many people are using VoIP services? Here are interesting numbers… In 2007 there were almost 65 million worldwide voip subscribers. In the USA, over 16 million US VoIP subscribers, with continue to grow 6-8 million new subscribers every year, about 24 million US VoIP subscribers expected by 2008. By 2010 , US VoIP Subscribers will reach 44 millions, and the number of worldwide subscribers is predicted to rise to over 197 millions.

So what is VoIP – VoIP is standing for ” Voice over Internet Protocol “. VoIP also is referred to as Internet Telephony, IP Telephony, or Voice over the Internet, VoIP Telephone, Broadband Telephony, Broadband Phone, Voice over Broadband, or simply Internet Phone.

Voice over Internet Protocol (VoIP) is a protocol optimized for the transmission of voice hrough the Internet or other switched networks. It’s described as the transmission of voice traffic over IP-based networks, a unique technology that allows us to make calls using a broadband Internet connection ( through broadband modem ) instead of a regular (analog) phone line. At first, the Internet Protocol (IP) was originally designed for data networking systems. Later, with its success in data networking field and the explosion of Internet Era, the IP has been developed in voice networking and nowadays it is bringing us the most profit in this field. VoIP has become more and more popular because of the cost advantages to consumers compares to traditional telephone networks.

A brief explanation on how does VOIP work? – The traditional phone system is using analog phone signals to deliver and receive calls, with VoIP system, it’s using digital signals that can be sent over the Internet. If you have quality Internet connection – DSL (digital subscriber line), described as High Speed Internet Service which makes fast Internet connection ) you can get phone service delivered through your Internet connection instead of from your local phone company. In basics, here is how system works:

PC to PC: Computer connects to Broadband Modem connects to Internet connects to Broadband Modem connects to Computer

PC to Phone: Computer connects to Broadband Modem connects to Internet connects to Telephone Network connects to Telephone

Phone to Phone ( using Router ): Telephone connects to Phone Adaptor connects to Router connects to Broadband Modem connects to Internet connects to Telephone Network connects to Telephone

Benefits of using VoIP: There are two major reasons to use VoIP: Low Cost and More Profits

Low Cost: Phone services via VoIP costs less than equivalent services from analog systems. With the traditional analog phone services, users pay a flat monthly fee for the service, and pay other fee for long distance call service plus per-minute charge. With VoIP, the users who already have High Speed Internet service (DSL), can take advantage by using VoIP over this service – Many VoIP Service Providers allow you enjoy unlimited in-network calling – it means you can call any other in-network customer without charge. Other companies allow you to call any number, including local, long distance, mobile, and international numbers. For International calling, the users who using VoIP can get big savings with lower rates. Depends on each VoIP service offer, you can enjoy unlimited calling worldwide to many destinations for a flat monthly fee with no minute charge or low rates.

More Profits – Compares to analog phone networks, VoIP has more advantage functions. You can make calls from your personal computer to other’s computer or other’s regular phone, or you can make calls directly from your regular phone to other’s regular phone. Besides, The digital signals let you enjoy high quality voice and many advantage services such as Voice Mail, Caller ID, 3-Way Calling, Call Waiting, Speed Dial, Repeat Dial, Do Not Disturb, Call Forwarding, Emergency 911 Service, Online Account Management, Virtual Calling Card, access the service to your cell phone…

Further more, Incoming phone calls are automatically routed to your VoIP phone where ever you plug it into the network, so you can take your VoIP phone with you on a trip, around the world – anywhere you can connect it to the High Speed Internet, you can call and receive your incoming calls anytime. The VoIP Router can be set up anywhere with High Speed Internet, it provides you the advantage of savings. For example, a VoIP provider allows you get the US number and connect the router outside of the US. So when you call to that number, just like you call locals, and the person who is in other country calls you by using this service ( connected through router ) just pay a very small charge per minute, or sometimes it’s free.

Loi Nguyen is a freelance writer, webmaster and internet, direct mail marketer since 1996. Visit VoIP Service Source , also Online Shopping Source with listing of helpful information on shopping stores, personal or business products and services. Foryoulist.com

The Lowdown on VoIP

admin — Wed, 16 Dec 2009 22:35:27 +0000

It seems like technology is headed for a massive telephone
change over. The traditional Public Switched Telephone Network
(PSTN) is looking to be replaced by VoIP. VoIP is short for
Voice over IP. VoIP is the routing of conversations over an IP
network or the Internet. VoIP uses a packet-switched network
instead of the circuit-switched voice transmission lines used by
traditional telephone networks. VoIP does not need an Internet
connection to work. A company that has a LAN connection with all
of its computers can utilize VoIP technology.

VoIP is a great technology, but has a variety of issues with
implementation. VoIP may face problems with latency because IPs
do not provide Quality of Service guarantees, nor do they
provide their packets of information in sequential order.
High-speed Internet connections are required for VoIP and
firewalls often prove tricky for VoIP technology. To combat
this, many people use Session Border Controllers (SBC).

VoIP technology has many advantages. There are more new features
with VoIP because of the lack of an International
Telecommunications Union. VoIP is still very much an open market
for developers, so the technology is constantly being improved.
VoIP also has a lower cost than traditional sources because of
the monopolies that exist or traditional phone companies being
controlled by the government. Some users even see VoIP phone
calls as free because they do not have to pay extra for the
service. The user only pays the Internet service provider, and
therefore the usage of VoIP seems to be free. You can also take
your VoIP phone wherever you go because all you need is a
network connection to make it work. VoIP technology will also
benefit network agents who work for call centers. Agents can
help callers from anywhere in the country with an Internet
connection. Finally, because VoIP is on the computer, there is
increased functionality. Conference calls can be held,
information can be sent, and things like address books can be
updated and shared over VoIP.

While VoIP has many advantages, there are a few drawbacks to the
service. One of the biggest drawbacks is reliability. Telephone
lines have back up generators in case of power outages, so
phones can keep working. Because VoIP is connected to the
Internet, a power outage will end a VoIP call when the computer
shuts down. To combat this, users must buy an expensive
uninterruptible power supply or a generator that must then be
installed on the premises. Internet connections are also subject
to disconnection, depending on crowded networks, and the quality
of the ISP. If the Internet connection drops, then the VoIP call
will be dropped. VoIP is also a problem for emergency calls.
Because of the nature of the Internet and VoIP systems,
emergency workers cannot trace calls. In the event that someone
with an emergency has a problem but is unable to give an
address, the emergency worker will not be able to trace the call
and find the person. VoIP carriers are already attempting to fix
this problem by implementing a technical work-around. Finally,
it will be very difficult to integrate VoIP on a massive scale,
because while the standard Plain Old Telephone System (POTS) has
a common standard, VoIP does not.

VoIP has many advantages as well as some large drawbacks. The
main roadblock in the way of global VoIP adoption is
reliability. When VoIP proves that it can be just as reliable as
traditional telephone services have been over many years, then
it will start to be adopted. VoIP technology is always
improving, so the problems with VoIP today are likely to be
solved sooner than many people expect. VoIP can truly
revolutionize both the business world and home life.

Mike Schuda writes about a variety of new technologies, but
focuses primarily on VoIP technology.

Switching to VoIP

admin — Mon, 14 Dec 2009 22:33:07 +0000

Product Description
More and more businesses today have their receive phone service through Internet instead of local phone company lines. Many businesses are also using their internal local and wide-area network infrastructure to replace legacy enterprise telephone networks. This migration to a single network carrying voice and data is called convergence, and it’s revolutionizing the world of telecommunications by slashing costs and empowering users. The technology of families driving this convergence is called VoIP, or Voice over IP. VoIP has advanced Internet-based telephony to a viable solution, piquing the interest of companies small and large. The primary reason for migrating to VoIP is cost, as it equalizes the costs of long distance calls, local calls, and e-mails to fractions of a penny per use. But the real enterprise turn-on is how VoIP empowers businesses to mold and customize telecom and datacom solutions using a single, cohesive networking platform. These busine… More >>

Switching to VoIP