Chiltern Telecom is a SIP Provider. SIP Trunking is our standards based replacement for traditional ISDN. It connects your PBX (telephone system) to the PSTN (telephone line) via broadband, Ethernet or private circuit into our national network. Our SIP Trunks work seamlessly with each of the leading IP PBX manufacturers in the UK market.

SIP trunking provides a phone service that will cope with any situation and give you 100% ‘up time’ on your telephony. Whether you need to keep your business running without expensive call forwarding costs in a disaster or emergency, or you need to load balance your calls between sites during peak hours.


  • Flexibility with your phone numbers
  • Allows you to move office and keep the same geographic number without any ongoing call forwarding costs and costs associated with new company stationery.
  • Business continuity
  • If your office has to be temporarily relocated in an emergency, this can quickly and cost effectively be achieved with SIP trunking to keep your business working.
  • Line rationalisation
  • For businesses with multiple sites, SIP trunking provides line rationalisation and reduces the number of PBXs you need to maintain – all with full control of the numbers associated with your business.
  • Save money
  • IP connectivity costs less than ISDN with lower call costs, free internal calls between extensions and offices (including international calls) and lower line rental costs for multi sites. Also, no expensive call-forwarding costs are required should you relocate or need to divert calls in the event of a disaster.
  • Resilience
Greater Efficiency = Greater Productivity = Less Cost = Happy customers
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