Session Initiated Protocol (SIP) trunking

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SIP trunking is a flexible and dynamic functionality that can be extended to any number of applications.

  • Cheaper more reliable IP connectivity
  • Free internal calls
  • Take your telephone number anywhere.

SIP is a reliable and cost effective way…

…of allowing your phone system to access the outside world via a broadband or data connection to our network.


SIP enables you to have a PBX installed to use Voice-over-IP (VoIP)…

…even to outside the enterprise network by using the same connection as the Internet connection. A single trunk includes multiple voice sessions.

  • A cost-effective alternative: to traditional ISDN, eliminating the need to purchase costly BRIs, PRIs or PSTN gateways
  • Cheaper, more reliable: IP connectivity
  • Free internal calls: and a wealth of SIP telephone features
  • Perfect for: medium and large organisations needing to communicate across multiple sites, moving office, upsizing or downsizing
  • Opens a new scope: of establishing other types of real time communications beyond LAN
  • More specific Quality of Service: (QoS) measures to ensure better and calculated voice quality
  • More reliable: than the traditional PSTN as a number of failover solutions can be implemented
  • Take your telephone number: with you wherever you move
  • Receive any UK number: at any site in the UK.

Intouch Advance, Festival Building, Ashley Lane, Shipley, BD17 7DB. Tel: 0844 568 0000