发明名称 |
COMMUNICATION RIGHT CONTROL SYSTEM FOR ISDN TERMINAL |
摘要 |
PURPOSE:To attain an automatic incoming state even at a terminal where a power supply is not applied yet by shifting the communication right to another terminal from a specific one when a communicatable state is secured with application of the power supply of another terminal corresponding to a subaddress after the specific terminal detects an incoming state and decides the subaddress. CONSTITUTION:A communication right control system contains a master terminal 13 which is connected to a DSU 11 via a bus 12 and plural slave terminals 14. The terminal 13 shifts to a communication state in response to the call setting signal received from a network. Then the terminal 13 analyzes a subaddress, controls the application of the power supply of terminals 14, and transmits an interruption signals to the network in a workable state. Each of terminals 14 analyzes an E bit received from the DSU 11. If this analyzing result shows an interruption signal sent from the terminal 13, a call restart signal is transmitted with use of a call number equal to that designated in the interruption signal. Thus a terminal 14 shifts to a communication state in place of the terminal 13. |
申请公布号 |
JPH04346534(A) |
申请公布日期 |
1992.12.02 |
申请号 |
JP19910120120 |
申请日期 |
1991.05.24 |
申请人 |
NIPPON TELEGR & TELEPH CORP <NTT> |
发明人 |
KAWASHIMA MASAHIRO;INDO KIYOSHI |
分类号 |
H04Q5/00;H04L12/02;H04L12/40 |
主分类号 |
H04Q5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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