VoIP Services

• Call Control Service

• • manages call establishment, reporting, mid-call services, call teardown

• Directory Service

• • Translates aliases, usernames, extensions, etc. into an endpoint transport address

• Gateway

• • Handles interaction between different types of networks

• Network Services

• • Traditional network services such as DNS, TFTP, DHCP, RADIUS, etc.

• Session Border Control

• • Call processing and filtering that is applied to signaling or bearer traffic as it crosses a trust boundary