What is PSTN?
“The public switched telephone network (PSTN) is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication” - Source
Analogue voice data is sent over a circuit-switched phone line made up of copper wires which is owned and operated by your phone provider.
What is ISDN?
“Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network” – Source
ISDN was introduced in 1986, allowing both voice and data services to be delivered simultaneously. For the technology and services at the time, it served its purpose very well and continued to do so for many years.
Why Are BT Openreach Phasing Out ISDN and PSTN?
They are old fashioned technologies with associated maintenance costs and limitations. PSTN is the traditional telephone line network which carries analogue voice data over copper lines. This technology dates back to the late 1800’s and has served us well. However, new technology brings cost savings and increased reliability which means the end for the traditional telephone line. Technology has moved on and old telephone solutions are lagging behind the alternatives in an increasingly fast paced digital world.
Why is BT switching to IP?
The recent investment and nationwide roll out of superfast fibre internet provide a viable alternative. In fact, BT have not installed any new ISDN lines in central London since 2014 which goes to show that many businesses have already moved on. But switching over 3 million active ISDN users is no small task, which is why businesses have so much notice.
How to Prepare for The BT Openreach ISDN Switch Off
Although the BT ISDN end of life of 2025 has not been set in stone, businesses will be unable to buy systems that use ISDN & PSTN after 2020. If you currently have a traditional ISDN/PSTN based system, now is a good time to look at your options with us at The Technology Group.
Although there is plenty of time until 2025 rolls around, it’s always best to plan ahead. You may find you want to migrate sooner rather than later after discovering the benefits of upgrading now.
Top 5 Business Benefits of SIP and VoIP
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