Technology

Call-through telecom providers use

Voice over IP Voice over Internet Protocol (VoIP), also known as IP telephony, is a set of technologies used primarily for voice communication sessions over Internet Protocol (IP) networks, such as the Internet. VoIP enables voice calls to be transmitted as ...

(VoIP) call termination to connect the caller to the recipient. Most of the call is carried over IP network, where cost of carrying of the audio signal is cheaper than traditional phone carriers. The calls that are initiated on the

Internet The Internet (or internet) is the Global network, global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a internetworking, network of networks ...

(''e.g.''

Skype Skype () was a proprietary telecommunications application operated by Skype Technologies, a division of Microsoft, best known for IP-based videotelephony, videoconferencing and voice calls. It also had instant messaging, file transfer, ...

) use VoIP. These calls can terminate at other point on Internet or even at the point, which is not on the Internet, ''e.g.'' traditional

telephone line A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. It is designed to reproduce speech of a quality that is understandable. It is the physical wire or oth ...

- this is known as call termination. The calls do not have to originate on Internet in order to use VoIP. A caller can dial a physical phone number, which is then routed over VoIP to the point when it is terminated at the recipient's physical phone line (fixed landline or wireless mobile or cell line), even in another

country A country is a distinct part of the world, such as a state, nation, or other political entity. When referring to a specific polity, the term "country" may refer to a sovereign state, state with limited recognition, constituent country, ...

. This is what call-through telecom operators do - they provide call termination at both ends of the call.

References

External links

United Kingdom of Great Britain
Cheap international calls from UK comparedComparison of international call providers from UK
{{DEFAULTSORT:Call-Through Telecom Telecommunications companies