| 摘要 |
PURPOSE:To improve the speech service by setting all lines stored in a conference speech trunk to the state during conference and attaining the initial setting a trunk in the state during conference without interrupting the conference. CONSTITUTION:A digital switch 100 setting a channel and a digital processing conference channel trunk 200 are connected via line transmission lines 101a- 103a and line receiving paths 101b-103b. An adding circuit 201 a of the trunk 200 is connected to transmission lines 101a-103a and a gate circuit 202 is connected to receivers 101a-103b. Further, a storage memory 205 for state control connected to the circuit 202 via a non-speech signal generating circuit 203 and a lead 204 for gate signal is connected to the circuit 202. Moreover, all the lines accommodated in a trunk 200 are set to the state during conference and the exchange is set initially without interrupting a conference by means of the trunk 200, allowing to improve the speech service. |
