SIP Trunking

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About SIP Trunking and what it means to you

Achieve significant cost-savings and simplify your enterprise infrastructure by consolidating your network connectivity through SIP trunking.

What can SIP Trunking do?

SIP trunking allows your enterprise to connect its IP-PBX and IP communications systems directly to a SIP service provider, reducing and sometimes eliminating the need for conventional PRI, BRI, ISDN or PSTN gateway connections. SIP trunking supports transport of all media types (voice, video, text) which makes it ideal for enterprises wishing to implement a unified communications solution.

SIP Trunking FAQ

What is a “trunk” in the context of SIP trunking?

A SIP Trunk is the logical connection between provider and enterprise defined by the IP addresses, and it could contain as many SIP sessions/ Concurrent Call Paths (CCP) as are needed.

Why do I need SIP trunking for my enterprise?

SIP trunking is proven to be more cost effective than multiple conventional connections to the PSTN, and 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 that 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, SIP 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 and SRTP, and topology hiding. 

Does Unify offer a SBC to enable SIP Trunking?

Unify offers the OpenScape Session Border Controller which provides a robust set of security capabilities for SIP trunking with an OpenScape Enterprise voice solution (OpenScape Voice or OpenScape 4000).

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