How does SIP Trunking Work & What Are The Benefits - XINIX

How does SIP Trunking Work & What Are The Benefits

What is SIP Trunking?

With any business, quality communications is key to success, while knowing that you’re getting the best product for the best value for money means knowing as much about the products in which you invest as possible. With Xinix World, we’re dedicated to making our telecommunications solutions as transparent as possible, which is why we’re delighted to bring you an essential guide to SIP trunking and how it can benefit your company.

A Session Initiation Protocol (SIP) trunk is a service which enables users with an installed private branch exchange (PBX) to benefit from such real-time communications solutions as VoIP. By connecting a SIP trunk to a traditional public switched telephone network (PSTN), businesses can communicate over IP outside the enterprise network, thereby delivering greater cost savings.

How does SIP trunking work?

A SIP trunk blends the connections for data and voice into a single line, making it possible for the data network to carry voice data. This functionality in turn facilitates long-distance calls, directory listings, and caller ID integration to a company’s existing telephony system. There are three primary components in SIP trunking:

  • IP PBX: An IP-based PBX communicates over an IP network, and also switches calls between VoIP users on local lines allowing users to share a number of external phone lines.
  • Internet telephony service provider (ITSP): The ITSP is responsible for the connectivity to the PSTN from an IP network, and transports IP communications across the internet.
  • Border element: This facilitates connectivity between an enterprise IP network, PSTN, and an external IP-carrier network. Usually managed by the service provider, the border element is often a SIP-capable firewall or a SIP-enabling edge device.
What are the benefits of SIP trunking?

There are a number of benefits for your company in investing in SIP trunking, including:

  • Allows companies to outsource PSTN connectivity to a third party, reducing long-distance phone charges
  • Eliminates investment in costly TDM-gateway equipment infrastructure
  • Enables dial codes to increase regional presence
  • Reduces month expenses
What are the associated costs?

The costs of sip trunking are in comparison to ISDN, relatively modest. SIP-based technology, such as an IP PBX, IP phones, soft clients, and SIP-friendly firewalls, may require initial investment, but the cost-savings on call costs will see you enjoy substantial ROI in no time.

For more details on the many benefits of investing in SIP trunking for your business, the potential rewards and savings you can enjoy, contact Xinix World today. Our team of advisors will be able to guide you through our SIP trunking products and identity the ones best suited to your needs.


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