Patent ID: 8199727
Filing Date: 2012-06-12
Classification: H04L,H04M,H04W

Abstract:
1. A serving mobile switching center (MSCe) for call delivery to a mobile station serviced by a wireless communication network, comprising: circuitry operable to receive call signals indicating a call setup with the mobile station of a called party; circuitry operable to perform the call setup to establish a communication link with the mobile station, further including circuitry for determining whether to provide ringback to a mobile station of a calling party; and wherein the serving MSCe is further operable to: initiate a ringback to the mobile station of the calling party, wherein, when ringback is initiated, then any time after the SIP call origination message has been received for call setup, the MSCe is operable to send a 180 Ringing message to the network supporting the mobile station of the calling party, the 180 Ringing message is a signaling command to the network supporting the mobile station of the calling party to also ringback to the mobile station of the calling party.