SIP trunking is quickly taking over as the preferred configuration for small and large businesses, government, and educational entities to receive both their internet and voice services. SIP trunks can interface with both IP and Traditional TDM pbx systems since they can be configured with a traditional T1 handoff. However, a native SIP handoff is the optimal and is the least expensive configuration. Some IP PBX systems do not charge a license fee for each of the SIP trunks connected to a system.
Government and Educational entities with fluctuating call traffic are quickly taking hold of this new technology, which allows for a baseline number of trunks with a burstable capability.