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How to configure SIP trunks for the enterprise

The cover of the book SIP Trunking by authors Christina Hattingh, Darryl Sladden and ATM Zakaria Swapan, published by Cisco Press. This chapter excerpt details how to configure SIP trunks in the enterprise, highlighting the important architectural and operational steps you must undertake while planning and implementing Session Initiation Protocol trunking.

Your enterprise has made the decision to replace PSTN gateways or PRIs with Session Initiation Protocol (SIP) trunking. Our SIP trunking primer pointed out the inherent pros and cons of deploying SIP trunks and this chapter excerpt from SIP Trunking: Migrating from TDM to IP for Business to Business Communications helped you design a multi-tiered approach to securing SIP trunks to prevent all possible attacks against your network. Next up: Learning how to effectively configure SIP trunks for your implementation.

There are a number of questions about how to configure SIP trunks and multiple network design and planning considerations to address prior to installation, and though it might require several phases of deployment, thorough upfront network testing and analysis assessments is vital. While implementing SIP trunking, you must closely monitor session management including trunk provisioning, bandwidth consumption, call admission control (CAC) and Quality of Service (QoS) issues, like jitter and packet loss.

In this excerpt of a chapter from SIP Trunking: Migrating from TDM to IP for Business to Business Communications, authors Christina Hattingh, Darryl Sladden and ATM Zakaria Swapan detail how to configure SIP trunks in the enterprise, highlighting the important architectural and operational steps you must undertake to successfully plan and implement a SIP-trunk configuration. In addition to session management and voice quality, this chapter addresses the importance of scalability and high availability, how to prepare for and mitigate downtime in the event of a SIP trunk failure, available real-time network monitoring tools to keep you abreast of the overall health of your network, and more.

Download the PDF of this chapter excerpt on how to configure SIP trunks from the book SIP Trunking: Migrating from TDM to IP for Business to Business Communications.

Reproduced from the book SIP Trunking: Migrating from TDM to IP for Business to Business Communications by authors Christina Hattingh, Darryl Sladden and ATM Zakaria Swapan (ISBN-10: 1-58705-944-4; ISBN-13: 978-1-58705-944-5). Copyright 2010, Cisco Press. All rights reserved. For more information about this and other similar titles, visit Cisco Press.


About the book:

While many large enterprises have made the transition to IP telephony, and service providers have largely converted backbone networks to VoIP transport, one key missing link remains -- most businesses still connect to service providers through inflexible TDM trunks. In SIP Trunking: Migrating from TDM to IP for Business to Business Communications, authors and Cisco experts Christina Hattingh, Darryl Sladden and ATM Zakaria Swapan show how to configure SIP trunks and explain how implementing SIP trunking can free enterprises to eliminate legacy interconnects and gain the full benefits of end-to-end VoIP.

Targeted at enterprise decision-makers, network architects, consultants and service providers, the book aims to demystify SIP trunking technology and trends. The authors clarify the often murky transition from TDM to SIP interconnects, separating myth from reality through a series of detailed examinations, instructions and models. The end result is what Cisco calls "the first complete guide to planning, evaluating and implementing SIP trunking solutions."

Read SIP Trunking: Migrating from TDM to IP for Business to Business Communications to learn more about:

  • The advanced unified communications solutions that SIP trunking facilitates.
  • The systematic planning questions that must be addressed when preparing to configure SIP trunks for your network.
  • How to generate effective requests for proposals (RFPs) for SIP trunking.
  • Asking service providers the right questions about implementing SIP trunking, and making sense of their answers.
  • Comparing SIP deployment models and assessing their tradeoffs.
  • Addressing key network design issues vital to how you elect to configure SIP trunks for your network, including security, call admission control and call flows.
  • Managing SIP/TDM interworking throughout the transition.

This was first published in April 2010

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