| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a call control system surely preventing mis-recognition of call connection information due to missing information in the unit of cells in the case of receiving call connection information processed as a cell by a receiver. SOLUTION: Call connection information from a terminal equipment 12a is fed to a voice CLAD 10a from an exchange 11a, in which the information is processed into cells and they are sent to an ATM network 1. The cell is received by a voice CLAD 10b, disassembled and sent to an exchange 11b. The exchange 11b selects a terminal equipment 12b contained by the exchange 11b based on the call connection information. If the call connection information is missing in the unit of cells due to congestion of an ATM network or the like, the voice CLAD 10b may be unable to decode the call connection information, and further the exchange 11b may receive illegal call connection information to select other terminal equipment. In order to prevent it, when cell abort occurs at the reception of the call connection information, it is informed to a transmitter side equipment about the occurrence of cell abort, resulting that normal connection cannot be attained.</p> |
