发明名称 |
SCANNING DEVICE FOR COMMUNICATION LINES COMPRISING AN ADDRESS GENERATOR |
摘要 |
The address generating device is provided for a communication line scanning device. The lines are connected to the scanning device through n line interface circuits, n varying in accordance with the network configuration. Each interface circuit can be connected to a various number of lines, for instance one line or k lines in a preferred embodiment, and comprises means for providing to the address generating device, a presence indicating signal indicating that it is plugged and a signal indicating the number of the lines connected thereto. A first logic circuit receives the presence indicating signals as inputs and generates on its outputs the address bits of the last present interface circuit to be scanned. A first counter able to count in binary mode up to n-1 is incremented by an increment pulse provided by a clock on each period assigned to the scanning of a line. This counter outputs the address bits of the successive interface circuits. A comparator compares the address bits so generated and the address bits of the last present interface circuit to be scanned and outputs a reset signal when these bits are equal. |
申请公布号 |
DE3175985(D1) |
申请公布日期 |
1987.04.16 |
申请号 |
DE19813175985 |
申请日期 |
1981.10.28 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION;COMPAGNIE IBM FRANCE |
发明人 |
CALVIGNAC, JEAN;GRANGER, YVES;MASCLET, ANDRE |
分类号 |
H04L29/04;G06F13/00;G06F13/22;G06F13/38;(IPC1-7):G06F13/42 |
主分类号 |
H04L29/04 |
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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