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SIP trunking is rising in popularity, with organizations evaluating it to reduce costs by reducing the number of PSTN trunks or over-subscribing IP bandwidth. However, there are also two other ways that it can be used to reduce costs, if you know what to do. This expert guide from SearchUnifiedCommunications.com highlights how you can best use SIP trunking to reduce costs, focusing on two methods that are not commonly practiced.