“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.
First Pest City Telephone Company Co. (ept) was established in 1992 with the aim of solving the supply of telephone services in several districts of Budapest and providing troubleshooting and customer service functions. When ept achieved its mission, its
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