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Document Title |
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JPS5217964B2 |
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JPS5252510A |
PURPOSE: Through control of exchange, the broadcasting speaker can be freely selected for wire-broadcast execution.
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JPS5248308U |
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JPS5211530B2 |
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JPS5222407A |
PURPOSE: To make it possible to preform discriminations of party line subscribers with a simple composition be eliminating the complicated party line discrimination circuits with the untilzation of the dial pulse receiving circuit in the...
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JPS526042B2 |
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JPS5216905A |
PURPOSE: When connecting a plurality of telephone devices to one telephone circuit in parallel, to prevent a call circuit of the other telephone device from driving even if one of them is dialled.
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JPS523688B2 |
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JPS52415Y1 |
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JPS51147203A |
PURPOSE: A controlling system of connection at a terminal station of an administrative radiotelephony system and the like for prevention of disaster, which is intended for multipurpose use of connection wires.
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JPS5141488B1 |
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JPS5135088B1 |
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JPS5134687B1 |
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JPS51108703A |
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JPS5131047B2 |
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JPS5131046B2 |
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JPS5186907A |
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JPS5124844B1 |
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JPS5124843B1 |
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JPS5117005B1 |
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JPS5159505U |
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JPS5153403A |
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JPS5113525B1 |
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JPS5116179Y1 |
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JPS5148211A |
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JPS518685B1 |
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JPS517366B1 |
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JPS5125902A |
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JPS513165B1 |
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JPS511086B1 |
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JPS51806B1 |
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JPS5040883B1 |
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JPS50156805A |
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JPS5035762B1 |
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JPS50116111A |
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JPS5026044B1 |
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JPS5098711A |
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JPS5023242B1 |
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JPS5022366B1 |
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JPS5022367B1 |
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JPS5020801B1 |
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JPS5018329B1 |
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JPS5017801B1 |
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JPS5020561Y1 |
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JPS5068402A |
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JPS5062510A |
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JPS5054011U |
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JPS5012847B1 |
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JPS5012851B1 |
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JPS5012244B1 |
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