VoIP cards are calling cards. They are used for communicating with those who have the VoIP system. There are a range of different cards that are available to purchase depending on the circumstance.
A VoIP softswitch (software switch), is a device used generally to transmit data between telephone calls with sound and also images. A example that is possible because of it is videoconferencing.
Long distance telephone calls is used before VoIP.
The best VoIP systems for small businesses are generally labeled and marketed as such. Small businesses interested in purchasing a VoIP should check out 'Business VoIP Review 2013', which ranks and reviews many of the most popular VoIP systems.
VoIP server has no radius since it is based via internet. As long as there is a connection of internet VoIP can be used too.
It depends on the voip provider, if payments are enabled for prepaid cards or online payment then it is possible to load via scratch card.
Yes. VoIP is also known as broadband phone.
VoIP is used to transmit a voice signal via the internet. If you need such capability (internet phone, for example) then VoIP is required.
How much you save depends on how much you spend on your landline and if there is any charge with your Voip provider. Generally you can save around $30 a month.
Calling cards commonly are also referred to as phone cards. "Some calling card companies are switching to VoIP, so that term gets thrown in a lot when talking about calling cards."
This assumes you mean telephone calling cards rather than business cards. Back in the stone age before VOIP, calling cards were a way of getting cheap long distance and international calling. They were popular because of their price and ease of use. Today, VOIP is causing the market to shrink.
A Voice over Internet Protocol (VoIP) adapter is used to connect a land line phone to high speed internet service. Vonage and VoIP Supply are two popular sources of VoIP adapters.
External sound cards are generally used in situations where internal cards cannot be used -- laptops in particular. Some external cards also offer more inputs and controls than many internal cards.