SIP trunking is a much more flexible solution that allows you to run your business more efficiently. Conversely, if they do not receive they anticipated number of concurrent calls, they pay to carry those unused lines.Įssentially, in a SIP trunk the internet replaces the traditional Public Switched Telephone Network (PSTN) trunk, removes the cost of dedicated lines, and allows the enterprise to communicate with a global audience at a fixed rate. Now, if that call center receives more calls than anticipated, in order to accommodate the load, they would need to add more channels, at an additional expense. Using a traditional phone system, the center would have to determine that peak rate and then install the requisite number of T1 lines and channels to accommodate that volume, based on the primary rate interface (PRI). Let’s say that our hypothetical call center needs to be able to make/receive X amount of concurrent calls during peak season. SIP trunking is a VoIP service that uses session initiation protocol (SIP), the switching technology used in VoIP telephone systems, to allow users to initiate and receive communications and services between connected facilities, as long as there is a sufficient bandwidth available.
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