Origination or Inbound Calls is used to refer to telephone calls that originate from the PSTN (public switched telephone network) and end the route on the Internet. Now more and more carriers are enabling Origination calls to be virtual by providing DID from every city without having to be located in that city. Call termination is considered to be the opposite of call origination because the direction of the paths are reversed. The terms are associated with the starting point of the calls, path of the route of the calls and termination point of the calls. The operators of IP telephony services can handle calls that originate or terminate on the Internet.
USA and Canada Toll Free
USA DIDs (5500 USA NPA-NXX)
Canada DIDs (250 Canada NPA-NXX)
ITFS (International Toll Free Service)
UIFN (Universal International Freephone Numbers)
International DIDs (local numbers from 100+ countries)