What is a ‘trunk’ in the context of SIP trunking? A ‘trunk’ is the logical connection for a single SIP session between two IP endpoints (e.g. enterprise IP communication system and IP service provider Network).
Why do I need SIP trunking for my enterprise? This is because it’s proven to be more cost effective than multiple conventional connections to the PSTN plus it can greatly simplify your network through the consolidation of voice and data connections.
What type of IP service do I need to connect with? Any broadband interface supporting IP communications can be used for SIP Trunking. What is important is having a reliable IP service provider which supports Service Level Agreements (SLA), provides a high quality of service and can optionally offer dynamic allocation of SIP Trunks during peak traffic times.
Is SIP trunking secure and reliable? Yes, this form of trunking has been proven in large scale production environments and is currently driving cloud adoption of enterprise communications. A Session Border Controller (SBC) is used as a security control point between the enterprise network and a SIP service provider. An SBC provides multiple security levels such as deep packet inspection, signaling and media security using TLS plus SRTP, and topology hiding.
Does Mitel offer an SBC to enable SIP Trunking? Mitel offers the OpenScape Session Border Controller which provides a robust set of security capabilities for it with an OpenScape Enterprise voice solution (OpenScape Voice or OpenScape 4000).
For more information about how this unified communications works at On-Line Communications, visit here.