| 摘要 |
PURPOSE:To attain originating from a PB subscriber to a mark-out line, by discriminating the end of a receiving number by the inter-digit timing over of the receiving number or specific code reception in case of originating from the PB subscriber to a toll network in a private electronic exchange of a private route network using mark-out connection method. CONSTITUTION:When a PB subscriber's PBTEL is off-hooked, a subscriber's PBTEL is connected to a PB originating register trunk PBORT on the exchange side and a dial tone DT is sent to the subscriber's PBTEL. After hearing the DT, the subscriber's PBTEL dials a terminating subscriber's number. After storing the dial number and receiving the prescribed number of digits, the exchanged EX side discriminates whether it is extension subscriber terminating or mark-out line connection, and when the mark-out line connection, connects the trunk TRK of the catched mark-out line to a DP sender trunk DPOST and sends the PB dial code received from the subscriberr' PBTEL as the DP. In the application, the PB subscriber of EPBX can dial a number continuously independently of the mark-out line. |
