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Sure lines & calls offers a range of cost effective and reliable voice connectivity options from traditional analogue telephone lines, ISDN, through to cloud based SIP trunks.

We offer bespoke Plans including everything from local to International Calls and non–geographical numbers. Request a free of charge bill comparison and analysis to find out how much you can save with us.

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Sure SIP Trunks

Sure SIP Connect Trunks provide cost effective and reliable voice connectivity for your PBX. With inclusive call packages and flexible contracts

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Keep your own numbers

Port existing numbers over the Sure SIP platform and you can also choose any numbers from any part of the UK and portray a local presence.

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ISDN Switch off 2025

British Telecom plans to start phasing out ISDN lines as early as 2020 and a total closure of this network planned for 2025. – Don’t Panic !

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Key Benefits of the Service

Sure Business Systems are 100% committed to delivering a first class service that meets the need of our customers

  • Inclusive UK Landline & Mobiles calls
  • Greatly reduced telephone bills against virtually any existing service provider
  • Enhanced Disaster Recovery (DR) options including Auto-Failover to an alternative number
  • Extremely flexible and scale-able to meet all your future demands
  • Dedicated, SIP trunking can be delivered over DSL or Ethernet services
  • Inclusive network level fraud monitoring
  • Keep all your current Geographical telephone numbers
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