KR970058136A - Call Forwarding Extension Call in Simple Exchange Period Using Private ISDN - Google Patents

Abstract

The present invention relates to a method of calling an extension by converting an incoming call to another extension, and in particular, by switching an extension received between simple exchanges using multiple channels of private ISDN and configuring a call path with the extension. The present invention relates to a call forwarding extension calling method in a switching period using a private ISDN that allows an extension subscriber to receive a call anywhere.

That is, the present invention interconnects a plurality of simple switching periods through a plurality of channels of the private ISDN, thereby facilitating call forwarding of the calling station regardless of place and distance, thereby providing a higher quality service to subscribers using the simple switch. The purpose is to provide.

Accordingly, the call forwarding function, which was only possible in one simple exchange, is realized in a number of simple exchange periods using a channel of private ISDN, so that the subscriber can answer the extension call regardless of the location and distance. Multiple simple exchanges can be operated together with a single simple exchange to provide high quality telephone service to extension subscribers.

Description

Calling Extension Call in Simple Exchange Period Using Private ISDN

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

1 is a block diagram of a call forwarding extension calling system of a simple exchange period according to the present invention,

FIG. 2 is a flow chart of a method for calling a call forwarding extension in the simplified exchange period shown in FIG.

2 (a) is a flow chart for the registration process of the call forwarding function according to the present invention,

Figure 2 (b) is a flow chart for the operation of the call forwarding function according to the present invention.

Claims (3)

A call forwarding extension calling method of a simple switching period in which a plurality of extension subscribers are swimming, the call forwarding to transfer an incoming call from the first extension subscriber of the first simple exchange to the extension of the second simple exchange. Registering a switching function; After the first process, a first extension subscriber of the first exchange and a second extension subscriber of the second simple exchange that receive the switched extension are connected to each other via a channel of a private ISDN to perform a call forwarding function. A call forwarding extension calling method of a simple exchange period using a private ISDN, comprising two steps. 2. The method of claim 1, wherein the first process comprises: a first step of inputting a monitor button for setting an input ready state by a first extension subscriber of the first simple switch and inputting a call forwarding button; And a second step of inputting a corresponding extension number after inputting a selection button for selecting the second simple exchange which accepts the extension to be forwarded after the first step. Call forwarding extension calling method. 2. The method of claim 1, wherein the second process further comprises: a first step of authorizing a call ring to the first extension subscriber and confirming that the first process is registered if the first extension subscriber does not answer; If the first process is registered in the first step, it is determined whether there is an available B channel to transmit call information, the B channel is allocated, and the second simple switch exchanges the extension connection information signal through the D channel. Sending a second step; A third step of, if the first process is unregistered or there is no available B channel in the first step, continues to authorize the ringing to the first extension subscriber and then terminates the call; And a fourth step of, after the second step, the second simple exchange receiving the extension connection information signal and granting a call ring to the second extension subscriber which has been transferred. How to call an extension. ※ Note: The disclosure is based on the initial application.