Voice over Internet Protocol, also called VoIP or Internet telephony, is the transportation of voice conversations over the internet or through any other IP-based network rather than the public switched telephone network (PSTN).
Protocols which are used to carry voice signals over the IP network are commonly referred to as Voice over IP or VoIP protocols. Some cost savings are due to utilizing a single network to carry voice and data. Users that have existing underutilized network capacity can use VoIP at no additional cost. VoIP to VoIP phone calls on any provider are typically free, while VoIP to PSTN calls generally costs the VoIP user.
There are two types of PSTN to VoIP services: DID (Direct Inward Dialing) and access numbers. DID connects the caller directly to the VoIP user, while access numbers require the caller to input the extension number of the VoIP user. Access numbers are usually charged as a local call to the caller and free to the VoIP user, while DID usually has a monthly fee. One can also find DID that are free to the VoIP user but charge the caller instead.
Key features of VoIP:
VoIP can facilitate tasks that may be more difficult to achieve using traditional networks, such as:
• Routing phone calls over existing data networks to avoid the need for separate voice and data networks.
• Incoming phone calls can be automatically routed to your VoIP phone, regardless of where you are connected to the network. Take your VoIP phone with you on a trip, and receive incoming calls whenever you are connected to the Internet.
• Free phone numbers for use with VoIP are available in the USA, UK and other countries from several organizations.
• Call center agents using VoIP phones can work from anywhere with a sufficiently fast and stable Internet connection.
• Many VoIP packages include PSTN features that most Telcos normally charge extra for, or may be unavailable from your local Telco, such as 3-way calling, call forwarding, automatic redial, and caller ID.
• VoIP allows users to travel anywhere in the world and still make and receive phone calls.
Flexibility:
• VoIP service users can make and receive local phone calls regardless of their location. For example, if a user has a US phone number and is traveling in Europe and someone calls the US phone number, it will ring in Europe. Conversely, if a call is made from Europe to US, it will be treated as a local call. Of course, there must be a connection to the internet, for e.g. Wi-Fi, to make all of this possible.
• Users of Instant Messenger based VoIP services can also travel anywhere in the world and make and receive phone calls.
• VoIP phones can integrate with other services available over the Internet, including video conversation, message or data file exchange, in parallel with the conversation, audio conferencing, managing address books and passing information about whether others (e.g. friends or colleagues) are available online to interested parties.
By: Waqas Taimoor
Posts Tagged ‘Local Call’
Introduction to VoIP Technology
October 28th, 2009VoIP – Pros and Cons
October 11th, 2009
VOIP is short for Voice Over Internet Protocol, what that means is that your phone calls will be made through an internet connection, rather than through standard telephone land lines. Though it’s relatively new, many people have decided to switch over to VOIP phone service for a number of reasons.
One of the biggest advantages of VOIP is that no matter where you are, if you can connect to the internet, you can make and receive phone calls. In many cases, service providers will offer a package that allows local calling from anywhere in the world. What this means is that if you call any phone number in your local home phone area, even if you are across the world, it will be charged as a local call. This is the same if anyone in your local home area calls your number, even if you’re somewhere else, it’s a local call.
Another advantage of VOIP is that most providers include extra features, such as caller ID, call forwarding, 3 way calling and auto redial. These features can be costly with standard phone service. VOIP also works with many instant messaging programs like MSN, Google Talk and Skype. It can also be used for file sharing, video conferencing, voice conferencing and other internet based applications.
VOIP providers often offer unlimited calls to and from your phone number, even if you’re calling overseas, which can save you a great deal of money every year. For those who call distant relatives often, VOIP is definitely the way to go.
The biggest disadvantage is that, if you lose your internet connection, your phone will not work. Also, if you have a slow connection or any interference, you can get an echo or dropped calls. VOIP phones need electricity as well, so if your power goes out, so will your phone.
VOIP service is not the most secure way to communicate, because they are sent over the internet, it is possible for someone with the right know how, to listen in on your calls. Another problem is with caller ID, VOIP phones will not show up on the call ID of people you call.
So VOIP might not be something you want to rely on completely, but teamed with something like a prepaid cell phone, it can definitely save you some money on your phone bill.
By: Joanne Greco
