| 摘要 |
<p>A call is indirectly established by triggering a call register (24) to request a mobile switching center (14), associated with a mobile station (10), to establish a call between the mobile station and a second party. <??>In an example, an emergency call back is established between the mobile station (10) and a public service answering point (20). <??>A method is also disclosed to add a party to an existing call, sending a request to a mobile switching center serving an existing call between the mobile station and a second party, to add a third party associated with a service identified in the request. <IMAGE></p> |
