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Single User Accounts Most PBXs can act as a B2BUA and derive basic service from an ITSP using a single user identity. This model has many limitations, such as: DID is not supported due to single outbound calling identity Individual user features are not possible Basic Trunking Basic ‘proxy to proxy’ routing between an IP PBX and service provider This model also has many limitations, such as: No easy model for billing traceability, unless per call authentication is used No support for dynamic IP address assignment (SBCs need a REGISTER) Individual user identity is generally not conveyed What’s Missing? Single responsible party with multiple identities IP PBX to SP: What Works Today? |