Our simple guide on switching from ISDN to SIP

With the end of ISDN approaching, more businesses are moving to the future of busines voice services, SIP.


We have created a quick short guide for those on the first step of the journey to SIP to help them understand the benefits, such as:

  • Free calls to UK mobiles and landlines
  • Geographic and disaster recovery number flexibility
  • Advanced call handling features and easy control of entire number estate
  • Readiness for the ISDN switch-off

Download our guide.

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