| 摘要 |
PURPOSE:To receive the dial pulse once converted via the repeating reception relay to break and isolate the channels in terms of the circuit and then to actuate the original repeating relay in case the dial pulse information which was once converted is relayed. CONSTITUTION:The extension subscriber requiring the pulse conversion is connected to the trunk shown in the figure, relay SA operates by the sender start signal along with relay PA actuated concurrently. The converted dial pulse drives relay PA via terminal D, and thus relay CA operates with the first release to break and isolate the channels. The operation of relay PA is relayed to relay A, and the dial pulse is transmitted to the partner station through contact (a). The break and isolation of the channel is released during the dial pause. Accordingly, the dial tone can be sent back any time from the partner station, omitting the supervisory for the digit number. |
