Study: Building a Business Case for SIP Trunks

Evaluating a case study on enterprise uses for SIP trunking.

Today, we’d like to highlight an excellent study on how to build a business case for SIP trunking. The research, sponsored by Oracle, correctly notes that implementing SIP trunking is usually the third phase in an organization’s conversion to Voice over Internet Protocol (VoIP), following the installation of IP-PBX and IP phones and then using VoIP/SIP to interconnect auxiliary voice communication systems such as voice messaging, call recording, and IVRs. The study does not purport to define the business case for IP telephony; rather, it does offer a detailed cost benefits analysis on SIP trunking, based on telecom prices in the continental United States.

According to the research, the business case for SIP trunking is a six-step process (shown below) and the study offers a process and suggested metrics for each step:

  1. Understand the business requirements for voice connectivity in terms of availability, capacity, quality, security, and features.
  2. Gather existing voice communication costs by reviewing existing infrastructure and rates.
  3. Issue RFPs to estimate the costs for migration to SIP trunks.
  4. Determine the appropriate architectural model – Centralized vs. Distributed
  5. Put together the business case with a cost-benefit analysis
  6. Highlight other strategic reasons for implementing SIP trunks besides cost savings.

Following the summary, the paper includes instructions on how to create a “SIP Trunking Calculator” that shows potential savings. Also included are well-researched appendices that show prices for WAN connections, SLA parameters, a model for private SIP trunks, and other valuable information like sample international calling rates that can help define the SIP trunking business case.

The full study is archived at Webtorials and can be found here. Thanks to Oracle and Webtorials for making this detailed report available.

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