JPH04242361A - Telephone exchange - Google Patents

Abstract

PURPOSE:To prevent the talking of an extension telephone set from being disturbed by a busy tone uselessly even when the extension telephone set receives an incoming call from an external line during the talking. CONSTITUTION:A control section 2 references a setting data in a memory 3 to discriminate whether or not a ring tone is raised with respect to an incoming call, and in the case of making ringing, the state of the relevant telephone set is discriminated by referencing a busy flag in a memory 3. When the discrimination of all telephone sets is finished, the control section 2 references a flag (RING) in the memory 3 to discriminate whether or not a telephone set rings a usual incoming call tone and terminates the processing when the telephone set making ringing exists. On the other hand, when a telephone set making usual ring tone is not in existence, an extension interface 7 is started to make ringing a busy tone to all relevant telephone sets based on a telephone set number saved in the memory 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button telephone device having a function of sounding a busy ringtone.

0002

2. Description of the Related Art Conventional telephone exchanges are constructed so that when a call is received from an outside line and the extension telephone is busy, the telephone that is in use sounds a busy ringtone.

0003

[Problem to be Solved by the Invention] However, in the above-mentioned conventional example, even if a normal ring tone sounds on a nearby telephone, the busy ring tone sounds on the telephone that is in use, and the call is unnecessarily interrupted. There was a problem.

0004

[Means for Solving the Problems] The present invention solves the above-mentioned problems, and when a call is received from an outside line, it is determined whether the extension telephone set to ring the incoming call is busy or not, and all telephones are busy. The system is designed to play a busy ringtone when the call is in progress.

[0005]

[Embodiment] FIG. 1 is a block diagram of a telephone exchange device according to an embodiment of the present invention. In the figure, 1 is a main device, 2 is a control unit that controls the entire device, and 3 is the status and settings of outside lines and extension lines. A memory for storing data, etc., 4 a speech network that connects an outside line, an extension line, and a communication path between the extension lines, 5 an outside line interface that detects incoming calls from an outside line, 6 an outside line, and 7 communicates with a telephone set. Extension interface 8 is a telephone.

FIG. 2 is a flowchart showing the operation of the control unit 2 when an outside call is received in this embodiment, and the operation will be explained below according to this flowchart.

[0007] First, the control unit 2 connects the outside line interface 5.
Monitors incoming calls from (step S0), and when there is an incoming call,
The normal incoming call ringing flag (RING) in the memory 3 is cleared (step S1), and the following steps S2 to S6 are executed for all telephones.

The control section 2 refers to the setting data in the memory 3 and determines whether or not to ring in response to an incoming call (step S2). If the telephone rings, the state of the corresponding telephone is stored in the memory 3. The determination is made with reference to the busy flag (step S3). When a call is in progress, the control unit 2 saves the corresponding telephone number in the memory 3 for use as a busy ringtone (step S).
5). If the telephone is not in use, the extension interface 7 is activated to make the corresponding telephone ring a normal ring tone, and the normal ring ring flag (RING) in the memory 3 is activated.
is set to 1 (step S4).

[0009] When the determination of all telephones is completed (step S
6) The control unit 2 refers to the flag (RING) in the memory 3 and determines whether there is a telephone that has sounded the normal ringtone (step S7), and if there is, the process ends.

On the other hand, if there is no telephone that has sounded the normal ring tone (all telephones are talking), the extension interface 7 is activated for all corresponding telephones using the telephone number saved in the memory 3 in step S5. A busy ringtone is sounded (steps S8 and S9).

[0011] The volume of the normal ringtone and the busy ringtone are different.

[0012] In this embodiment, a busy ringtone is sounded for all telephones when all of the telephones with the normal incoming ringing designation are busy, but it is not possible to set the busy ringtone to sound beforehand. You can also set the busy ringtone to sound only on specific telephones. (Other Examples) In this example,
When a call is busy, if there is an extension that belongs to the same group that can normally receive a call, the busy call is not made.

The configuration of this embodiment is the same as that of the telephone exchange shown in FIG.

FIG. 3 shows the operation of the control section 2 of this embodiment, and FIG. 4 shows the table stored in the memory 3 of this embodiment.

When the outside line interface 5 detects that there is an incoming call on the outside line (1) of the outside lines 6 (step S11), the control unit 2 refers to the table shown in FIG. 4 stored in the memory 3. When a call is received on the outside line (1), it is determined whether or not the extension designated to ring is busy (steps S12 and S13). In the example shown in FIG. 4, extensions 1 and 2
, 3, 4, 5, and 6 are designated to ring when an outside line (1) is received.

The control section 2 sets 1 in the corresponding table of the memory 3 when each extension goes off-hook to 1, and resets it when the handset goes off-hook.

In the example shown in FIG. 4, since extension (1) is not busy, the control unit 2 uses the extension interface 7 to
to send out a normal calling signal (step S14).

[0018]The control unit 2 then uses the extension interface 7.
Determine whether there is a response from extension (1) via
17) If there is no response, it is determined whether the incoming signal is interrupted via the outside line interface 5 (step S19).

[0019] If the incoming call continues, the next extension (2
) and (3).

In the example shown in FIG. 4, extension (3) is busy, so
The control unit 2 determines whether the group of extension (3), that is, another extension (extension 4) belonging to group 2, is busy (step S15). Since the extension 4 is busy, the control section 2 causes the extension interface 7 to send a busy ringing signal to the extension (3) (step S14). The same applies to extension (4).

Regarding extension (5), since extension (6) belonging to the same group is not busy, the busy transmission signal is not sent to extension (5).

On the other hand, since the extension (6) is not busy, the control unit 3 sends a normal ringing signal (step S
14).

[0023] By repeating the above operations until one of the extensions responds or the incoming signal is interrupted, the normal ringing signal and the busy ringing signal are continuously sent.

When the extension interface 7 detects that one of the extensions has responded to the incoming call, the control section 3 controls the speech network 4 to connect the responding extension to the incoming outside line (step S18).

As described above, according to this embodiment, when an extension in the same group is being called by a normal calling signal, the calling signal is not sent to the busy extension. That is, since the extensions of the same group are ringing as usual, the caller can know the incoming signal even if the busy ring tone does not sound. Furthermore,
Since no unnecessary busy ringtone sounds during a call, it is possible to prevent the call from being interrupted more than necessary.

[0026]

[Effects of the Invention] As explained above, when an extension phone receives a call from an outside line while the extension phone is on a call, if there is another phone that has a normal ringtone, the busy ringtone will not sound. This has the effect that the call will not be unnecessarily interrupted by the busy ringtone.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a telephone exchange device according to an embodiment of the present invention.

FIG. 2 is an operation flowchart of the control section of the embodiment.

FIG. 3 is an operation flowchart of a control section in another embodiment.

FIG. 4 is a table diagram of a memory in another embodiment.

[Explanation of symbols]

1 Main device 2 Control section 3. Memory 5　External line interface 7. Extension interface 8　Telephone

Claims (1)

[Claims] Claim 1: A detecting means for detecting that an extension is busy; and a transmitting means for transmitting a busy signal to the extension detected to be busy by the detecting means so that a busy ringtone is generated. The telephone exchange apparatus is characterized in that the transmitting means does not transmit a busy signal to the extension if another extension is not busy even if the detecting means detects that the call is busy.