US Patent 8634537 Method of routing calls from a contact center

A method and apparatus are provided for routing calls from a contact center. The method includes the steps of providing a SIP presence server within the contact center that only provides presence information in support of outgoing calls from agents of the contact center, receiving a presence message by the SIP presence server identifying a communication port of an client and routing a call from an agent of the contact center to the client based upon the received registration message.