SIP trunking (Session Initiated Protocol trunking) uses an IP connection to connect PABX and key systems to the public switched telephone network (PSTN). SIP is also an enabling protocol for supporting voice, data and video simultaneously.

A wide range of centralised and decentralised PBX architectures are supported, giving you the flexibility to rationalise your voice network and offer unified communications features across your sites.

With both TDM (ISDN) and IP PBX variants available you can leverage your existing telephony assets without older technologies holding you back from features offered with next generation IP networking.