A method, server, and terminal for selecting an access domain for sending information between a wireless terminal and a core network, wherein sessions between the wireless terminal and the core network are established and controlled using an IP Multimedia Subsystem (IMS). A database maintained in the IMS stores information regarding real-time packet-switched service capabilities of a plurality of access domains. The database is interrogated based upon currently used and/or available access domains. An access domain is selected for use by the wireless terminal based upon the results of the interrogation.