JP2583228B2 - Telephone exchange - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a telephone exchange in which a so-called key telephone is used as an extension telephone and dial-in connection is possible by a dial operation of a caller. And the designation of an extension telephone that audibly displays a sound.

[Conventional technology]

The designation of the extension telephone by the conventional telephone exchange is determined in advance according to the operating conditions from the extension line fixedly based on the system data or the like, or the visual display (lamp display) for the incoming call to the office line like the dial-in service of the office line ) And the audible display (ringing display) is limited to only one extension telephone corresponding to the extension number dialed from the central office line.

[Problems to be solved by the invention]

According to the conventional telephone exchange described above, it is not possible to designate an extension telephone or an extension telephone group from a central office line, or if an extension telephone is designated by dialing an extension number from a curve, not only the ringing tone but also the ringing indicator is displayed. Since it is limited to the designated extension telephone, there is a problem that other extension telephones cannot respond to the destination telephone line, let alone know the incoming line. SUMMARY OF THE INVENTION The present invention has been made to solve this problem. In an office incoming call, an incoming call (audible display) is performed while an incoming call (audible display) is performed by designating an extension telephone or an extension telephone group from the outgoing line. Prior to this, it is an object of the present invention to simultaneously display incoming call lamps (visual display) to other extension telephones not specified beforehand and make it possible to respond to the call, thereby facilitating the response to the incoming call from the central office.

[Means for solving the problem]

In order to solve the above problems, the present invention provides means for automatically responding to an incoming line signal and means for receiving a dial signal from the office line. In addition to visually displaying the incoming call on the lamp in the line selection key of all extension telephones having a curve selection key corresponding to A tone (so-called dial tone) or a voice message for prompting the user to dial an extension number is sent to the office line to which an automatic response has been made and the dial signal receiving means is enabled and the automatic response has been made. The extension number or extension group number dialed from the office line is received and translated by the dial signal receiving means, and the corresponding extension telephone or all the extension telephones in the group are ringed, so that the arrival of the office line is visible and audible. This is displayed.

(Example of the invention)

1 and 2 are drawings for explaining an embodiment of the present invention. FIG. 1 is a block diagram (relay system diagram), and FIG. 2 is a flowchart showing an outline of operation.

In FIG. 1, COT is a station line trunk, PBREC is a PB signal receiver for receiving a PB signal (a dial signal assembled from AC signals of two different frequencies) from the station line, and ANSE is a station. An automatic answering machine that creates a response state for the incoming call of the line trunk COT and sends out a response message or a dial tone and a ringing tone, EXT.A to EXT.C are the extension to which the key telephone is connected, and SW is the office trunk COT. Switch network that connects extensions EXT.A to EXT.C, CC is the above-mentioned office trunk COT, PB signal receiver PBREC, automatic answering device ANSE, extension EX
It is a central control unit by a microcomputer for controlling T.A to EXT.C and the switch network SW.

The operation of the embodiment shown in FIG. 1 proceeds according to the flowchart of FIG. That is, in FIG. 1, the central control unit CC transmits an incoming signal from the central office to the central office trunk COT.
EXT.A.-E.
The line telephone corresponding to the destination line of the key telephone set connected to the XTC (all of which have a line selection key corresponding to the destination line) blinks, and a visual display of the incoming line is displayed. The counting of the response timing is started.

When the first set time predetermined by the response timing elapses, the central control device CC activates the PB signal receiver PBREC at the elapse of the set time to prepare for receiving a dial signal from an office line, Activate the automatic answering machine ANSE to create a response state for the destination line, send a response message or dial tone to the destination line, and specify the destination extension such as the extension number for the curved subscriber (caller) Prompts you to dial.

Subsequently, when an extension number or an extension group number (hereinafter referred to as an extension number, etc.) dialed by the caller from the called office line arrives, the extension number or the like is transmitted by the PB signal receiver PBREC through the office trunk COT. It is received and transferred to the central control unit CC. The central controller CC analyzes and translates the transferred extension number and the like, and the extension designated by the extension number or the like, for example, EXT.A or the extension group such as EXT.A ~
The tone ringer or the like of the key telephone set in the extension group composed of EXT.C is sounded to provide an audible display for an incoming line signal. In this case, if an extension specified by an extension number or the like as a ringing destination is busy, a ring tone (ring tone during a call) different from the tone (ring tone) of a normal tone ringer is displayed on the key telephone of the extension. Audible indication of the incoming line signal.

On the other hand, a call back tone (ringback tone) is transmitted from the automatic answering device ANSE to the terminating office line via the office line trunk COT.

In the above, if the extension that the ringing key telephone is connected to after the second set time elapses, for example, neither EXT A nor any extension, responds to the incoming line All or a specific one or more extensions having a key telephone having the selected office line selection key, or, if the telephone exchange has an office relay station (not shown), A ringing display of a local line incoming call can be performed.

That is, when the audible display of the incoming call to the designated extension or extension group is started, the central controller CC starts counting the non-response timing. When the second set time determined in advance by the non-response timing elapses, the central controller CC displays the audible indication displayed on the key telephone set of the designated extension or extension group at the elapse of the set time. All the key telephones having the line selection key corresponding to the line or one or more specific key telephones are transferred, and when the telephone exchange has a central office relay station, all the above or one or more specific key telephones are switched. Instead of the incoming call display on the key telephone, or together with the incoming call display, an incoming audible display of the office line is displayed on the central office relay stand.

If the designated key telephone extension, for example, EXT.A does not respond because it is absent or busy, the caller on the office line dials another extension, such as EXT.C or EXT.C. A tone ringer or the like of a key telephone set of another extension group, for example, EXT.D to EXT.G (not shown), can be sounded to change the audible display destination for an incoming office line. .

That is, in the above operation, the PB signal receiver PBREC is connected to the destination office line via the office trunk COT so that the PB signal receiver PBREC continues after receiving the dial number from the destination office line, A dial signal (a dial signal sent by a caller's operation) from the called station line can be received any time before the set time determined by the non-response timing, that is, before the lapse of the second set time. So that Then, when a new dial signal (a dial signal sent by the caller after the second dial operation) is sent from the incoming outside line before the second set time, the time when the first dial signal is received is set. By the same operation, the audible display of the incoming office line is shifted to the key telephone set of the extension or extension group specified by the new dial signal. In the above operation, the counting operation of the non-response timing in the central control device CC stops at the start of reception of a new dial signal and starts audible display of an incoming call to a newly designated extension or extension group. It starts again from the beginning.

As described above, the incoming line signal is displayed visually and audibly,
When one of the extensions, for example, EXT.A, presses the central office selection key corresponding to the central office lamp on which the incoming call is being displayed, the central control unit CC detects this and presses the switch network in a known manner.
The SW is controlled to connect the central office trunk COT with the extension, for example, EXT.A, which is pressed by the central office selection key corresponding to the destination office line of the key telephone. In this way, a response path from the telephone-phone connection extension to the incoming call on the local line is enabled.

In addition, while the above-described operation is in progress, the visual display of the incoming call curve is continuously displayed on the office line lamp corresponding to the incoming office line of all the button telephones having the select key of the incoming office line. In addition, the response to the destination line is not limited to the audible button telephone, but can be performed by any key telephone having a selection key for the destination line.

〔The invention's effect〕

As will be apparent from the above description, the present invention provides a method for receiving an incoming line signal to a lamp in the line selection key for all extensions to which a key telephone having a line selection key corresponding to the line is connected. After displaying the incoming call and after a certain timing, automatically respond to the incoming line signal, connect the PB signal receiver, send a response message or dial tone to the office line, and then the extension dialed from the office line or The incoming call is audibly displayed on the extension or the key telephone set of the extension group designated by the extension group number. According to the present invention, the extension or Incoming calls are also displayed (visual display) besides the key telephones of the extension group, and it is possible to respond to the called office line from this point, and when an extension or an extension group is designated from the office line side, it corresponds. Incoming calls are displayed audibly on the tongue telephone, prompting a response, and in this state, it is possible to respond from any extension (extension to which a button telephone having a selection key corresponding to the receiving office line is connected). A remarkable effect is obtained that the response to the local line incoming call can be made more convenient.

[Brief description of the drawings]

FIG. 1 is a block diagram (relay scheme diagram) showing an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the embodiment. COT: Central line trunk, ANSE: Automatic answering device PBREC: PB signal receiver CC: Central control device, SW: Switch network EXT.A to EXT.C.

Claims (3)

(57) [Claims] 1. A telephone exchange in which a key telephone is connected to an extension and a caller of an office line can designate an extension or an extension group by his / her own dialing operation. When an incoming call occurs on a local line, a visible display means for displaying the incoming call to all the key telephones having a local line selection key corresponding to the incoming local line, and the visible display state of the visible display means is first. Automatic response means for automatically responding to the destination line when the set time is continued, dial signal receiving means for receiving a dial signal sent from the destination line by automatic response by the automatic response means, An audible display means for audibly displaying the incoming call on a telephone of a designated extension or extension group. 2. The telephone exchange according to claim 1, wherein when the key telephone audibly displayed by the audible display means is busy, the key telephone has a normal ringing sound. Is a telephone exchange designed to display audible with different ringing sounds. 3. A telephone exchange in which a key telephone is connected to an extension and a caller of an office line can designate an extension or an extension group by his / her own dialing operation. When an incoming call occurs on a central office line, a visual display means for displaying the incoming call to all the key telephones having a local line selection key corresponding to the incoming local line, and a visual display state by the visual display means is a first state. Automatic response means for automatically responding to the called line when the set time is continued, and a dial signal sent from the called line after the first set time has passed by the automatic response by the automatic response means. 2. A dial signal receiving means for receiving any time before the elapse of the set time 2, and an extension or an extension group designated by the dial signal received by the dial signal receiving means. An audible display means for audibly displaying the audible display, the audible display state resulting from the audible display being continued for the second set time, and when the second set time has elapsed, the audible display destination A telephone exchange in which designation is transferred to all of the key telephones having the line selection key corresponding to the destination line, or to one or more specific key telephones or central office relay stations.