Patent ID: 8499082

Claim:
A method for providing supplementary services to IP multimedia subsystem (IMS) devices and non-IMS devices using common IMS network components, the method comprising: providing an interoperability standard/session initiation protocol (IOS/SIP) adapter configured to communicate with a base station subsystem and an IMS network; and at the IOS/SIP adapter, receiving, from the base station subsystem, a request for providing a supplementary service to a non-IMS device in communication with the base station subsystem, and in response to the request, sending a message to a call session control function (CSCF) in the IMS network that provides the supplementary service to the non-IMS device and to IMS devices, wherein the message sent to the CSCF is a session initiation protocol (SIP) INVITE message that includes IOS mapped SIP bearer parameters and is sent after radio resources are assigned by the base station subsystem, wherein the request from the base station subsystem comprises an IOS message.