“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.
Hardware, Hosted VoIP billing service provider, International VoIP Wholesale Provider, Internet Telephony Service Provider, Internet VoIP and Video Conferencing Service Provider, Network Service Provider, SIP Billing, Voip consulting, Voip Termination ISP
Read more