| 摘要 |
<p>Described is a method of exchanging information that is performed by a first device with a second device, both of which devices are registered with a voice over IP core network, the first device having placed a call over a circuit-switched network to a third device, said call actually being set up between the first device and the second device. In one embodiment, the method comprises: receiving over the circuit-switched network a message confirming that the call has been set up with the second device, which message includes an identifier of the second device on the circuit-switched network; and exchanging information with the second device via the core network and using the identifier of the second device, which information relates to the capacity of the first and/or second device to support at least one rich communication multimedia service.</p> |
