- Friday, 15 January 2016 19:58
- Written by Jenifer blade
Voice over Internet Protocol (VoIP)
is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks. Other terms frequently encountered and synonymous with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and broadband phone.
Internet telephony refers to communications services — voice, facsimile, and/or voice-messaging applications — that are transported via the Internet, rather than the public switched telephone network (PSTN). The basic steps involved in originating an Internet telephone call are conversion of the analog voice signal to digital format and compression/translation of the signal into Internet protocol (IP) packets for transmission over the Internet; the process is reversed at the receiving end.
VoIP systems employ session control protocols to control the set-up and tear-down of calls as well as audio codecs which encode speech allowing transmission over an IP network as digital audio via an audio stream. Codec use is varied between different implementations of VoIP (and often a range of codecs are used); some implementations rely on narrowband and compressed speech, while others support high fidelity stereo codecs.
The way we make phone calls is changing. In fact in many circumstances things have already changed. Take long distance calls for instance, many service providers are already using a technology called Voice Over IP or VoIP for short. If you have never heard of it before, then the following article will change the way you think about how long distance phone calls are being made now, and about how all phone calls will be made in the future. Voice Over IP is a method for turning analog audio signals into digital data that can be transferred over the internet.
You may be asking yourself how this is useful. Well, think about it for a few seconds. If it is possible to turn analog signals into digital data, then VoIP can turn a standard internet connection into a method for placing phone calls anywhere in the world virtually free, except for your internet service fee, enabling you to bypass the phone companies entirely.
Voice Over IP (VoIP) has the potential to completely revolutionize the way the world’s phone systems operate. There are many VoIP service providers that have been around for a while, and are growing steadily. Now the world’s leading telecommunications operators are waking up to the endless possibilities of this new technology, setting up calling centers around the world, and promoting the sales of Voice Over IP phone systems.
Because with Voice over the IP you can make calls from anywhere you have access to a broadband connection, users can take their IP phones or ATAs with them on trips and still have access to what is essentially their home phone.
Some people use a softphone to access their service. A softphone is a specially developed software application that loads the VoIP service onto your desktop computer or laptop. Some even have an interface on the screen that looks like a traditional phone. These softphone applications allow you to place VoIP calls from your laptop; anywhere in the world you have access to a broadband connection.
Most traditional phone companies charge you for extra features that are added to your account. With VoIP service providers these usually come as standard. Features such as:
1. Caller ID
2. Call Waiting
3. Call Transfer
4. Repeat Dialing
5. Return Call
6. Three-Way Dialing
VoIP VS PSTN
- Friday, 15 January 2016 19:50
- Written by Jenifer blade
VoIP Versus PSTN
VoIP (Voice over the Internet Protocol) also known as Internet Telephony isn’t really a new technology — it’s been around for many years in one form or another, but only fairly recently has it become reliable and ubiquitous enough to be a serious choice for business. While Internet telephony was once an oddity often plagued for garbled and dropped calls, these days a well-planned and implemented VoIP system can provide call quality and reliability that rivals mobile phone or landline calls.
How VoIP Works
To understand how
VoIP, short for Voice over Internet Protocol, works, it’s helpful to compare it to how conventional phone calls operate. When you place a “regular” phone call using the Public SwitchedTelephone Network (PSTN), also known as Plain Old Telephone Service (POTS) you use what’s called circuit-switched telephony. This system works by setting up a dedicated channel (or circuit) between two points for the duration of the call. These telephony systems are based on copper wires carrying analog voice data over the dedicated circuits.
This is in contrast to newer Internet telephony networks based on digital technologies. VoIP, in contrast to PSTN, uses what is called packet-switched telephony. Using this system, the voice information travels to its destination in countless individual network packets across the Internet. This type of communication presents special TCP/IP challenges because the Internet wasn’t really designed for the kind of real-time communication a phone call represents.
PSTN Versus VoIP: A Feature Comparison
- Dedicated Lines
- Each line is 64kbps (in each direction)
- Features such as call waiting, Caller ID and so on are usually available at an extra cost
- Can be upgraded or expanded with new equipment and line provisioning
- Long distance is usually per minute or bundled minute subscription
- Hardwired landline phones (those without an adapter) usually remain active during power outage
- When placing a 911 call it can be traced to your location
- All channels carried over one Internet connection
- Compression can result in 10kbps (in each direction)
- Features such as call waiting, Caller ID and so on are usually included free with service
- Upgrades usually requires only bandwidth and software upgrades
- Long distance is often included in regular monthly price
- Lose power, lose phone service without power backup in place
- 911 emergency calls cannot always be traced to a specific geographic location
Calling cards and calling frequency
- Friday, 15 January 2016 19:02
- Written by Jenifer blade
International Calling cards and calling frequency
The online phone cards include many fees per call apart from the call rate. The connection fee is charged every time you make a connection to a phone. The maintenance fee is charged to maintain the quality as long as you speak. Some companies follow seconds billing while other follow minute rounding to determine the total call cost. Some of the prepaid cards have an expiration date, and you have to use the credits within the expiration date. All these factors incur cost depending on your call frequency. If you make many short calls, look for companies providing a low connection fee. If you make a few long calls, look for companies offering low maintenance and communication fee. Those who use their phone card often don”t have to worry about the expiration date. Otherwise, you have to be careful to use your credits before they expire.
The ultimate aim to use international phone cards is to save money. Many websites on the internet provide a comparison between various telecom companies selling phone cards. Before picking a phone card, look for user reviews. Apart from the cost determining factors, you have to find companies offering good quality service. You have to balance between cost and quality when you choose online phone cards.
What To Consider In Buying International Calling Cards
- Friday, 15 January 2016 18:58
- Written by Jenifer blade
prepaid calling cards
are convenient and easy to use to make international and long distance phone calls. Especially International calls are extremely expensive and not all the phone companies include long distance calls in their default program. Finding the company that fits to your need is not always easy. Getting the right service is always matter of balance between phone call quality and rates and remember .. there is no free lunch despite what someone says. A good idea to try out the companies who are offering a 100% money back guarantee on their services. That way if all else fails at least you won’t have to pay anything!
All the companies have different rates when you call a mobile or a landline phone. There are prepaid cards specially made to make phone calls to mobile phone, they cost less than the other prepaid cards, so it helps you save more money. But remember rates fluctuate according to the market, don’t expect to get the same rate during the years. EasyPhonia promptly inform users as soon the rates for the phone calls change, a good idea is to login into the user portal and verify the cost of phone call from the simulator. There are also cards with fees and no fees EasyPhonia has no fees. You always have to remember that the cheaper the card, the more fees are applied through higher maintenance fees and taxes. On the other hand, the cards without fees have a higher call per minute rate. When buying calling cards you always have look for the toll free number so you can reach their customer service anytime. These cards are also sold in different denominations according to your needs. This also saves you from all the hidden taxes and fees most plans will hit you with.
You can easily purchase them and get the PIN emailed to you and start making calls right away. Phone cards also come in two different types: rechargeable and non rechargeable. Rechargeable cards can be used without getting a new PIN number every time you make a call; all you need to do is purchase more units or minutes.
For those who travel very often and need to make international or domestic calls, using a prepaid card can be very helpful. By using affordable prepaid cards, you can easily be connected to your loved ones.
International phone cards allow you to make international calls at low call rates. Using such cards, you can call various countries at low prices. You can escape from huge roaming fees charged by many telecom industries when you use the international phone cards. Buying international phone cards online is simple and easy. These prepaid cards can be purchased from the online phone card company”s website. Once you pay with your credit card or PayPal, you will receive the prepaid card. If you want to increase calling credits, you can recharge from the same website. There are a few important points to consider when you buy online phone cards.
Countries of origin and destination
Your best online phone card depends on your use. Normally, you want a solution which allows you to call certain countries at low rates. Look for companies which provide cheap services to the countries you want. The country from which you start a call is also important. Some phone card companies allow you to call many countries from certain states. You can use such services if you stay in a state but wish to call overseas friends. In particular EasyPhonia does not make any difference on the country you are calling from, we tent to have one single rate per country, some exception may came if we had to setup expensive equipment to grant the communication.
Regular phone or pay phone
While online phone card companies allow cheap calling, the calling rates differ with the way you make calls. Before buying online
phone cards, check if the company charges more if you call from payphones. The call rate varies if you call pay phones or cell phones or landline. To get the best choice, you have to compare various companies and solutions and pick one which satisfies your needs.