What is SIP trunking?
Business SIP trunking is a platform deployed for business IP technologies including Voice over Internet Protocol (VoIP) service. SIP Trunking creates a digital voice line within a data connection, which essentially provides you with an all-data voice experience. Careful network design is required to fully experience the benefits that SIP trunking has to offer.
SIP trunking is reliant upon your data connection, designing a hybrid solution could provide redundancy where circuit failure occurs
Can be configured to work over multiple locations using only one premise based PBX with an MPLS connection