“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.
SIJ Communication is mainly focused on the VOIP wholesale business and hosted service provider for wholesale carrier. Our premium and standard routes fulfill our customer requirements with having good ACD and ASR.