| 摘要 |
When two terminals (T 1, T 2 ) communicate with each other via a first service via a network, switching from the first telephone service to a second telephone service enables the two terminals (T 1 , T 2 ) to continue to communicate with each other via the second telephone service. In order to carry out said switching, a telephone service transformer ( 6 ) interrupts the communication between the two terminals (T 1 , T 2 ) using the first telephone service; calls the two terminals (T 1 , T 2 ) in parallel via the second telephone service; and then interconnects the two terminals (T 1 , T 2 ) by joining the respective communications established between the transformer ( 6 ) and the two terminals (T 1 , T 2 ) in order to establish a communication between the two terminals (T 1 , T 2 ) via the second telephone service. |
