“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.
Spirited Broadband provides Business class services either by tradional circuitry or via IP. SBB specializes in trunking existing PBX`s and will be happy to serve your Business needs today.