| 摘要 |
A telecommunication system enables a server to receive a request from a calling external telecommunication device (CTD) for a telecommunication connection with a receiving external telecommunication device (RTD), establish data connection with CTD in response to request, receive from CTD a receiver identifier (RID) and store RID, establish a data connection with RTD using RID, transmit to RTD, after data connection is established, a server identifier (SID), close data connection with RTD after transmission, receive a request for a telecommunication connection from RID via SID within a time slot after said closing, check, in response to request for a telecommunication connection from RTD via SID, if RID of RTD matches stored RID, and establish a telecommunication connection through server between CTD and RTD if RID matches stored RID. |
