| 摘要 |
PURPOSE:To elevate the operation efficiency, shorten the time required for connecting the extension, and improve the service for connecting the extension, by releasing and correcting the erroneous dial No. only, in case an operator of the repeating board has dialed by mistake in the common control private branch exchange. CONSTITUTION:In case an operator of the repeating board releases and corrects a dial error of the third digit before starting the marker MKR, the relay CCB of the position register PR continues the operation by depressing the dial error release key CC of the repeating board ATT. When dialing of 3 numerals has been all completed, the relay CR is operated for self-holding, the relay RCK is operated, the operating circuit of the relay CR is cut off, and also the malfunction of the relays AR, BR is not caused by release of the relay CD. As a result, the relays 1C-4C, CD related to the dial No. code of the third digit are released since the self-holding circuits are cut off, and the dial error No. code of the third digit is released. After that, an operator is able to make a correction by returning the key CC to its original position and dialing the third digit once again. |
