“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.
Tempura Communications are a distributor of ISP and Telco services and related products including videoconferencing, security, and IT, serving the Reseller community throughout the UK, Europe and the US.