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SIP Trunking by ATM Zakaria Swapan, Darryl Sladden, Christina Hattingh

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Introduction

Today is an unusually interesting time in the field of unified communications as we stand at the dawn of a major industry transition in how communications flow between businesses. The network implementation to enable this communications flow is drastically changing in terms of technology, products, connectivity, service provider offerings, and cost. One of these changes is the transition to Public Switched Telephone Network (PSTN) trunking technology.

The industry is active with discussions of Session Initiation Protocol (SIP) trunking, but the appreciation of its real implications is just beginning. This book is written to help you understand and navigate these uncertain and fast-changing waters. Deciding when to change ...

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