Nikola Milojević (2010) Ensuring high reliability of VoIP systems. EngD thesis.
There are not many amongst us, who do not use telephone on a daily basis. Despite some pretty pessimistic forecasts, wireline telephony does not seem to be dying away. It rather seems it is undergoing a thorough technological transformation, migrating from bearer to service. The key element of this process is softswitch (SSW), a device, aiming to supersede classical telephony switch. This thesis is intended to be a comprehensive overview of planning and implementation steps, aimed at ensuring a high degree of VoIP service reliability. Most information here is derived from Cirpack telephony platform, which is used as main residential softswitch in Telekom Slovenia network. The main part of thesis is based on hands-on experience, obtained during five years of uptime. Most of presented technical solutions are in fact used in production environment as well. The developed know-how is a result of intense department cooperation.
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