PSTN 1 : (ICT) PSTN stands for Public Switched Telephone Network. This is the basic public telephone network which connects every telephone in the UK. It was once only an analogue system but is gradually being changed over to digital
Teach-ICT.com (Information and Communications Technology), Browse by alphabet, USA 2015. http://www.teach-ict.com/glossary/E/ergonomics.htm , (Info and Commun Tech - Amer) {736}