Patent ID: 8923281
Filing Date: 2014-12-30
Classification: H04L,H04M

Abstract:
1. A method comprising: receiving, at a feature server of an Internet protocol multimedia subsystem, a call screening indication message originated by a first user device to initiate a call screening session, the call screening indication message originated by the first user device while a call originated by a second user device is being established with the first user device, the first and second user devices being operable with the Internet protocol multimedia subsystem; sending, to the first user device, a communication session initiation message comprising a session initiation protocol INVITE message indicating session redirection and forwarding are prohibited, the communication session initiation message to establish the call screening session with the first user device; receiving a call screening termination message at the feature server; initiating a communication session between the first user device and the second user device in response to the call screening termination message, the first and second user devices having been involved in the call screening session; and releasing a signaling resource of a messaging server, the signaling resource having been used in the call screening session.