| 摘要 |
The electrocommunication signal converter for both AD and DA changes incorporates a signal receiver which accepts a number of participants to a telephone conference a number of initiation of each new contribution, a numeric/analogue converter and a conversation sequencing device. For n participants to a conference, one line is opened for the operator and(n-1) lines are opened for the listeners on initiation of a new speaker line, the sequence is changed to enable the conference to continue.
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