| 摘要 |
<p>PURPOSE:To identify the call setting time point having no intervention of a storage device with the designating method of the addressed subscriber number, by indicating the call alternation to the storage device in a special field within a call setting request packet. CONSTITUTION:A general subscriber T1 sets the number of an addressed subscriber T2 to an address number within a call setting request packet P3 and at the same time the call alternative indication information to a storage device S1 to a special field within the packet P3, respectively and then transmits them to an exchange station N1. The station N1 gives routing to the device S1 based on the call alternative indication information to set up a call between the subscriber T1 and the device S1. Then the call alternative indication information is deleted after all information packets are received from the T1, and a call setting request P4 is sent to the N1. The N1 sends the P4 to a station N2. The N2 sets up a call between the T2 and the S1. As a result, the communication is performed between the T1 and the T2 via the S1. While the communication between the T1 and the T2 with no intervention of the S1 is performed when the T1 sets only the number of the T2 to the address number within the P3.</p> |
