The ISDN (Integrated Services Digital Network) phaseout and shut-down is in full swing. From 2023 BT are no longer going to be supplying new ISDN connections, and as of 2025 the PSTN that ISDN connections rely on will be fully switched off.
This has left many of our customers needing a suitable replacement to the ISDN lines they’ve relied on for years. Whilst many alternatives are available, SIP lines have proven themselves as a flexible, scalable alternative to ISDN that brings increased functionality without compromising on call quality or pricing.
SIP Trunking is a voice, video and conferencing connectivity solution. There is a reason SIP Trunking and SIP lines are becoming incredibly popular amongst businesses worldwide. SIP Trunking is an API that allows your business to transfer voice and data across the same channel.
ISDN delivers voice data across a traditional copper telephone network. In the UK, the national copper network is in the process of being replaced by a national fibre infrastructure. Replacing your ISDN lines with SIP ensures your phone systems isn’t put out of action by the PSTN switchover and provides a superior service at a much more streamlined cost.