JPS6041356A - Additional dial call waiting system - Google Patents

Abstract

PURPOSE:To transmit quickly information by identifying additional dialing of a prescribed number with a prescribed register to send a call waiting tone to an extension subscriber if an originating subscriber dials additionally this prescribed number. CONSTITUTION:When an extension subscriber 6a is busy, a central controller 5 connects a terminating central office line trunk 2 to a talkie trunk 4a through a switch network 1. Then, the trunk 4a sends information, which indicates that the extension subscriber 6a is busy, and a message of an additional dial number for call waiting to a trunk line. When the office-side originating subscriber dials the call waiting number, the dial number is counted by a PB receiver 3 to send information to the controller 5. Thereafter, the call waiting tone is transmitted from a tone trunk 8 to the subscriber 6a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a call waiting function in an automatic private branch exchange system, and provides an additional dial call waiting system in which a caller can realize a call waiting function by additionally dialing a predetermined number. It is related to.

It is an object of the present invention to provide an incoming call to an automatic private branch exchange, even if the extension subscriber is busy, by the operation of the caller on the branch line. The purpose is to audibly announce the sound, realize a call waiting function, and quickly transmit information.

In order to achieve such an object of the present invention, the configuration of the present invention is such that a talkie trunk or voice money machine on which a message is recorded is connected to an automatic private branch exchange, and a caller on the central office line side of an incoming call on the central office line is connected to the automatic private branch exchange device. performs additional dialing of an extension subscriber number, and if the extension subscriber is busy,
The incoming station line trunk is connected to the above-mentioned talkie trunk or voice money machine, and matters such as call waiting number guidance are sent to the caller, and the call is received with a register that counts the additional dialed digits by the PB double signal. A central office line trunk is connected, and the central office line caller additionally dials a Neil waiting number to send a call waiting tone to the extension subscriber.

Hereinafter, an embodiment of the additional dial call waiting method according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the additional dial call wait ink method according to the present invention.

In Fig. 1, when an incoming call is received from a central office line, the incoming central office line trunk 2 (CIC
T) and the PB receiver 3 (PBR), and the terminating station line trunk 2 and the talkie trunk 4a (TKT), respectively. This talky trunk 4a sends a message to the central office line to the effect that the extension subscriber number to be called should be dialed. Thereafter, when the caller on the central office line side dials the extension subscriber number, the dialed digits are counted by the PR receiver 3, and the dialed digit information is sent to the central controller 5 (CC).
). As a result, the central control device 5 releases the connection between the terminating office line trunk 2 and the talkie trunk 4a. At the same time, it is determined whether or not the dialed number subscriber 6a is busy, and if so, the terminating office line trunk 2 and the talkie trunk 4b are connected. At this time, the PB receiver 3 is connected to the terminating office line trunk 2.

Next, the talkie trunk 4b sends a message to the central office line to the effect that the extension subscriber 6a is busy and to provide an additional dial number if call waiting is to be performed. here,
When a caller on the central office line side dials a call waiting number, the PB receiver 3 counts the dialed digits and sends the dialed digit information to the central control device 5.

This central controller 5 opens the terminating office line trunk 2, the talkie trunk 4b, the terminating office trunk 2 and the PR receiver 3, respectively, and then opens the line circuit 7a (LC) and tone trunk 8 of the extension subscriber 6a. Connect (TOT). Accordingly, from the tone trunk 8 to the extension subscriber 6a
A call waiting tone will be sent to the caller.

If the extension subscriber 6a and the extension subscriber 6b are currently talking, the line circuit 7a identifies this by hooking or making a specific dial, and this information is transmitted to the central controller 5. Send to. Upon receiving this, the central control unit 5 connects the line circuit 7a of the extension subscriber 6a and the tone trunk 8. Then, the line circuit 7a of the extension subscriber 6a and the line circuit 7b of the extension subscriber 6b are opened, respectively, and then the terminating station line trunk 2, the line circuit 7a of the extension subscriber 6a, and the hold tone unit) 9 (HTU) ) and extension subscriber 6b, respectively. This enables a conversation between the caller on the central office line side and the extension subscriber □a, and the hold tone is played from the hold tone unit 9 to the other extension subscriber 6b.

Here, when the extension subscriber 6a hooks up or dials a specific number again, the line circuit 7a identifies this and sends this information to the central controller 5. Upon receiving this, the central control device 5 opens the terminating office line trunk 2, the line circuit 7a of the extension subscriber 6a, and the line circuit 7b and hold music unit 9 of the extension subscriber 6b, and then,
The line circuit 7a of the extension subscriber 6a and the line circuit of the extension subscriber 6b are connected. This results in extension subscriber 6a.

6b becomes available for communication again.

As explained above, in the additional dial call waiting method according to the present invention, when the extension subscriber is busy,
A terminating station line trunk is connected to a talkie trunk or a voice base device, and the talkie trunk or voice base device sends predetermined information to the caller, and then the caller additionally dials a predetermined number. If a call waiting tone is heard, a predetermined register identifies this and issues a call waiting tone to the extension subscriber, so the extension subscriber who hears the call waiting tone can hook or make a specific dial. As a result, the caller on the central office line side and the extension subscriber are connected and ready to talk, and information can be quickly transmitted.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an additional dial call waiting method according to the present invention. l... Switch network 2... Incoming station line trunk 3... PB receiver 4a
, 4b...Talkie trunk 5...Central control unit 6a, 6b...Extension subscriber 7a, 7b...Line circuit 8...Tone trunk 9...Holding music unit applicant NEC Corporation company·

Claims (1)

[Claims] In an automatic private branch exchange system that has a register for counting additional dialed digits due to a PB double signal of a terminating central office line trunk and a central office line, and that connects the dial of a caller on the central office line side of an incoming central office line call directly to an extension line. , when the extension subscriber is busy, the incoming station line trunk is connected to a talkie trunk or voice money device, and the talky trunk or voice money device sends predetermined information to the caller. Then, when the caller additionally dials a predetermined number, the register identifies this and issues a call waiting tone to the extension subscriber. Ink method.