This is a link to the dedicated customer portal HEAT for ONI customers. It needs a user name and password in order to log-in.

 

Connectivity Services

SIP Services

SIP services or SIP trunking as it can often be referred to, replaces or supplements existing analogue or digital telephony lines with an IP data connection allowing organisations to take advantage of the benefits of VOIP. Once connected calls are handled in the same way but can now be routed over the Internet as well as the traditional telephone network.

SIP Services are reliable, simple and most importantly cost effective to operate. Rental charges are lower than standard analogue or digital telephone lines plus they allow calls to be routed off the traditional phone network providing telephony call savings, particularly if you are a multi sited organisation.

Other benefits include:

  • Flexible numbering options
  • Multi-site support
  • Free calls between IP sites and lower cost calls to other destinations
  • Full business continuity model for businesses without remote call forwarding charges
  • Scalable on a per channel basis and quick to implement

ONI SIP is based on the UK's market leading SIP Trunking service, connecting businesses directly into a highly available and reliable IP backbone with full connectivity to the PSTN network.