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Overview
This is a practical hands-on book for readers who want to understand how to build a SIP provider from scratch using the mature open source SIP server OpenSIPS, formerly known as OpenSER. Based on Building Telephony Systems with OpenSER, it is fully updated for OpenSIPS 1.6. It is suitable for VoIP providers, large enterprises, and universities. Readers do not need prior knowledge of OpenSIPS; telephony and Linux experience is helpful but not essential. The book uses a fictional VoIP provider to explain OpenSIPS, ...