VoIP service - ringcentral.com/voip-services/index.html?bmid=seo
VoIP or voice over internet protocol is voice calls transmitted over the Internet. This means calls can be made or received through a computer, a tablet, a laptop, or even a smartphone. But just because this technology uses the Internet doesn’t necessarily mean your analog phones are rendered useless. In fact, you can still use an existing public switched telephone network system (PSTN) to make VoIP calls.
All you need are some VoIP adapters that can help convert analog signals to IP. These are usually given to customers by VoIP service (ringcentral.com/voip-services/index.html) providers. You also have the option of buying your own from computer shops.
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