VoIP carrier
From Wikipedia, the free encyclopedia
Companies that provide origination (also called DID direct inward dial service from the PSTN public switched telephone network) or termination of Internet-originated VOIP calls to PSTN numbers are VoIP carriers. They may be facilities-based or resellers. It is very inexpensive for resellers to enter this business and no good way to determine whose services they are actually reselling, or if in fact they have the ability to provide the services they advertise.
