| 摘要 |
<p>A communication unit connected to Integrated Services Digital Network line comprises a caller management unit 2. This caller management unit comprises a line monitor (3) for monitoring in-house lines (4, 5) and detecting a caller side calling code included in a calling set up message applied at the time of reference, and a control unit (14) for storing the calling code detected by the line monitor (3) into a predetermined region (15b) of a memory (15). The control unit comprises circuitry for reading out the stored calling code from the predetermined region (15b) of the memory (15) in response to an output request and producing information corresponding to the calling code. The management unit (2) further comprises a unit (16) for displaying the information produced by the control unit. The memory (15) comprises a region for storing the detected calling code, as well as a memory region (15a) for storing plurality of predetermined calling codes and caller specification information corresponding to each calling code. The control unit (14) stores the detected calling code into the memory region (15b) in response to the response side non-response detection to reference by the line monitor (3). The control unit (14) further makes a determination whether a calling code coinciding with the calling code stored in the memory region (15b) is stored in the memory region (15a) in response to an output request, for applying the caller specification information corresponding to the calling code to the output unit (16) when coincidence is detected, while applying only the detected calling code to the output unit on non-coincidence detection.</p> |
