Patent ID: 8407299

Claim:
A method of interpreting contents of one or more message bodies, wherein said contents correspond to a content type, said method comprising: sending a Session Initiation Protocol (SIP) request message via a first IP network by a User Equipment (UE) device; receiving a SIP response message from a network node via said first IP network by said UE device, the SIP response message being responsive to said SIP request message and including at least one message body content in said SIP response message's body, wherein said SIP response message further includes a content type indicator and a content disposition indicator for said at least one message body content; and providing a treatment for said at least one message body content based on a value of said content type indicator independent of a value of said content disposition indicator, said treatment, applied by said UE device, comprising one of: (i) performing an Emergency Services (ES) call effectuated via a circuit-switched network and (ii) performing a registration and an ES call effectuated via an IP network, wherein the registration involves sending a SIP REGISTER message.