Month: September 2018

What is ISDN? ISDN (Integrated Service Digital Network) is the original high speed Internet service. ISDN requires a phone line. It is set the standard for telephone data service, these days it’s used for voice. Read More

What is PSTN? The Public Switched Telephone Network (PSTN) refers to the international telephone system that uses copper wires to carry analog voice data. It consists of a collection of individual telephones that are hardwired to a public exchange. The […]