发明名称 |
WIDE AREA CORDLESS TELEPHONE SYSTEM HAVING MEANS FOR AVOIDING DOUBLE REGISTRATIONS |
摘要 |
NE-144-Mk (053A/3) "Wide Area Cordless Telephone System Having Means for Avoiding Double Registrations" A wide area cordless telephone system covers a service area which is divided into a plurality of local areas to each of which belong a plurality of home position cordless telephones having multi-channel access capability. A plurality of access units are provided in each local area to define a plurality of access zones. A pre-dialing switching stage is provided for each local area to establish a connection between the access units and line terminals of a telephone switching system. Signals sent from any cordless telephone are received by a nearby access unit and applied to the pre-dialing switching stage. Each telephone transmits a registration request upon a manual command and, on receiving a response identifying a local area, returns an acknowlegement to identify the same local area as identified by the received response. On receiving a registration request, the pre-dialing switching stage transmits a response identifying the own local area through an access unit and assigns a reserved line terminal of the telephone switching system to a non-home position telephone if it is identified by the received request. On receiving an acknowledgement, the switching stage makes a registration of a telephone if the acknowledgement from it identifies the same local area as identified by the response.
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申请公布号 |
CA1287195(C) |
申请公布日期 |
1991.07.30 |
申请号 |
CA19880563077 |
申请日期 |
1988.03.31 |
申请人 |
NEC CORPORATION;NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
NAGASHIMA, NORIAKI;MONMA, KOHJI;MURATA, YOSHITOSHI |
分类号 |
H04W60/00;H04W74/00;H04W76/02;H04W84/16;H04W88/08;(IPC1-7):H04M1/72 |
主分类号 |
H04W60/00 |
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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