SIP Trunking, PSTN and ISDN: Unfurling Telecom Technology

Business operators, take heed: traditional telephony solutions are on their way out. In the next ten years, copper-wired communications are likely to become extinct as telecom providers worldwide plan to halt offering ISDN and PSTN services.

In their place, VoIP technology and SIP trunking are gaining wider adoption rate for multiple, convenient reasons. If you’re asking what’s wrong with your decades-old phone service, you might not have heard of the thing called the Internet. It revolutionized the way we communicate and collaborate, to put it simply.

Got lost in the acronyms? Let’s dig down and bring clarity to this relatively unassuming revolution in telecommunications.

The pioneers: PSTN and ISDN

Public Switched Telephone Network (PSTN), also known rather pointedly as Plain Old Telephone System (POTS) is the traditional system of telephony connecting phones all over the world, courtesy of the magic of copper wires. You might recall imagery of telephone operators manually plugging cables here and there on a giant wall, and you get the idea. It’s called switching, and modern PSTN has become entirely digital and automated.

Speaking of digital, Integrated Services Digital Network (ISDN) is the computerized phone system, but it still transmits voice and data over copper lines. It offers higher call quality and easier setup functionality than older phone systems.

Saying hello over the internet

Voice over Internet Protocol (VoIP) uses the internet to send packets of data, voice, and video that’s broken down in transit, then re-assembled accordingly upon reaching its destination.

A Session Initiation Protocol (SIP) serves multimedia communications, which sets up rules on how to manage connections between two points. SIP trunking connects organizations with an Internet Telephony Service Provider (ITSP), transmitting data packets back and forth through the network.

The benefits of ditching old-fashioned lines

With the end of the PSTN and ISDN age on the horizon, SIP trunking offers several advantages over its aged counterparts. Among them, as SIPTRUNK, Inc. says, are lower costs on calls and line rentals, location-independent service while keeping the same phone number, scalability with a greater amount of line and channel choices, and a simpler network architecture thanks to data network convergence.

Telecommunications technology has come a long way since Alexander Graham Bell’s first long-distance phone call. Convenience, affordability, and efficiency continue to be the pursuits of innovation, and web-based telephony is only another step towards greater communication capability.