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.