KR890017922A - Extension Switching Method in Private Exchange - Google Patents

Abstract

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Description

Extension switching method in private exchange

Since this is an open matter, no full text was included.

1 is a system diagram applied to the present invention, Figure 3 is a flow chart according to the present invention.

Claims (1)

An extension switching method for making a call with a third subscriber in a call with a first and second subscribers of a private exchange, comprising the first step of checking whether the second subscriber hook-flashes while the first and second subscribers are in a busy state; In the first process, when the second subscriber hookflashes, the second subscriber hooks a pending tone, the second subscriber attaches a switching tone, attaches a tone receiver, and when the second subscriber dials, pulls the switching sound of the second subscriber. Checking whether the first and second subscribers hook on when the second subscriber does not hook flash in the second process and the first process, the first subscriber recovers the first subscriber free when the first subscriber hooks up, and the second subscriber A third process of attaching a busy video to the subscriber and returning the second subscriber to the free state when the second subscriber hooks on and attaching a busy tone to the first subscriber, and the switching sound of the second subscriber is interrupted in the second process. When the number is dialed, it checks whether the dialed digit is the extension access number, and if it is not the extension access number, attaches Nouston to the second subscriber and checks whether the extension call is over when the extension access number is reached In step 4 and in the fourth process, when the extension is busy, attach a busy tone to the second subscriber and check whether the second subscriber hookhooks, and when the second subscriber hookhooks, the busy subscriber is disconnected from the second subscriber. 1, the fifth step of opening the communication channel between the second subscriber, and if the second subscriber hooked on when the second subscriber hooks the flash in the fifth process and checks whether the second subscriber is hooked on A sixth process of attaching the second subscriber to the second subscriber and freeing the second subscriber at the time of hook-on and attaching a busy tone to the first subscriber; A seventh process of attaching a ring to the third subscriber, a ringback tone to the second subscriber, and checking whether the third subscriber hooks off when the extension is not in a call; and when the third subscriber hooks up in the seventh process, 2 Disconnect the ringback tone of the subscriber, open the ring to the third subscriber, open the call between the second and third subscribers, and disconnect the first subscriber holdtone upon the hook-on of the second subscriber, And the hold-tone of the first subscriber is disconnected by checking whether the second subscriber hooks on when the third subscriber hooks off in the seventh process, and recovers the second subscriber free. Announces the ringback tone to the second subscriber and recovers the second subscriber free, and when the third subscriber hooks off, the first subscriber hangs up the ringback tone, the third subscriber hangs up, and connects the first and third subscriber lines. Free 2 subscribers A ninth process of restoring to a state, and a tenth process of making a call between first and third subscribers when a call path between first and third subscribers is formed in the eighth and ninth processes, and the second subscriber is restored to free. Characterized in that the process. ※ Note: The disclosure is based on the initial application.