发明名称 |
Method for retrofitting subscriber services in a centrally controlled telecommunications system, in particular a telephone PABX system |
摘要 |
Method for retrofitting subscriber services in a centrally controlled telecommunications system, a connection facility for an add-on module with an address controller and relay contacts being pre-fitted on the system motherboard which is designed as a printed circuit.
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申请公布号 |
DE3129941(A1) |
申请公布日期 |
1983.02.17 |
申请号 |
DE19813129941 |
申请日期 |
1981.07.29 |
申请人 |
SIEMENS AG |
发明人 |
NIESSNER,GERHARD |
分类号 |
H04Q3/62;(IPC1-7):H04Q3/54;H04M3/42 |
主分类号 |
H04Q3/62 |
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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