发明名称 |
COMMON CHANNEL SIGNAL EXTRACTION/INSERTION DEVICE |
摘要 |
A common channel signal extraction/insertion device for a multiplexed digital transmission system includes a common channel signal insertion/extraction circuit instead of time switches. The common channel signal insertion/extraction circuit includes: a receiver-side speed converter memory 51A for buffering the multiplexed signal 13 received from the multiplexer circuit (3); and a transmitter-side speed converter memory 52A for buffering the common channel signals received from the common channel signal controller 7. The high-speed and the low-speed side reading and writing operations are controlled by the high-speed side controller 510 and the low-speed side controller 51D, respectively. The selector 53 selects between the common channel signals read out from the transmitter-side speed converter memory 52A and the data supplied from the digital switching channel (6), thereby obtaining the multiplexed signal 13a and outputting it to the demultiplexer (12). <IMAGE>
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申请公布号 |
GB2262689(A) |
申请公布日期 |
1993.06.23 |
申请号 |
GB19920026397 |
申请日期 |
1992.12.18 |
申请人 |
* MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
MASATERU * YAMAKI;TOURU * SOGABE |
分类号 |
H04J3/00;H04J3/06;H04J3/12;H04M7/06;H04Q11/04 |
主分类号 |
H04J3/00 |
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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