Our company is a voip wholesale carrier,which is based in hongkong having many years experiments in the voip wholesale marketing ,providing best routes with competitive rate and professional technology team.
“Extension” - is the extension of the telephone line (PBX) or the Centrex system. It works as an association and allows calling to certain telephone sets without the necessity of dialing the telephone number, but only by dialing a short combination of digits, reaching the desired subscriber.