JPH04223647A - Switchboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange that sends busy call information to a telephone when a new call arrives at the telephone.

0002

2. Description of the Related Art Telephone exchange systems have traditionally provided a service called a busy call service. Here, the busy call service means that when a new call arrives at a telephone that is currently on the line, the switching system uses the telephone to indicate that there is a new incoming call to the telephone on which the busy call was received. A service that sends out a busy ringtone.

[0003] For example, if user C makes a call to user A during a call between user A and user B, the exchange sends a busy ringtone to the call channel that user A is using. The user A who received the call is notified that a new call has arrived. With this busy call service, user A hears the busy ringtone and learns that there is an incoming call from a person other than user B (user C), and either quickly finishes the call with user B or performs a hooking operation, etc. By using a call waiting service in which the call with user B is put on hold and the call with user C is placed in a talking state by a specific operation, it is possible to avoid missing an opportunity to talk with user C.

0004

[Problem to be Solved by the Invention] However, in the above-mentioned conventional switching equipment, there is only one type of busy ring tone emitted from the switching equipment, so there is no way to determine who is incoming a new call. However, there was a problem in that it was not possible to estimate the importance of the incoming call. In the conventional example above, user A cannot compare whether to give priority to the call with user B or the new incoming call (user C), and in order to know the content of user C's communication, it is necessary to I had to temporarily suspend the call. Moreover, if you answer the call to user C, who is the originator of the new call, you may find that the call with user B is not important and there is no need to interrupt it, or that you should have given priority to the call with user C. However, there have been problems such as new incoming calls being abandoned and the call being disconnected due to slow call interruption.

[0005] Also, now that ISDN (Integrated Service Digital Network) services have started,
It is possible to identify the caller using the calling number information sent from the network, but if the called party is an analog telephone, the calling number information cannot be sent as is using the ISDN communication control procedure, so if the caller is busy. There has been a problem in that it is impossible to identify the caller using caller number information when receiving a call.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an exchange that allows a user who receives a busy call to identify the caller and take appropriate measures.

[0007]

[Means for Solving the Problems] In order to achieve the above object, a first invention provides that when a new call arrives at a telephone currently in use, the caller receives a an identification means for identifying the caller information sent from the telephone; a sending means for sending the different plurality of the busy call information to the telephone; and an association for associating the caller information with the busy call information. means, when a new call arrives at the telephone during a call, the associating means selects the busy call information corresponding to the caller information of the call, and the sending means selects the busy call information corresponding to the caller information of the call, and the sending means selects the busy call information It is characterized in that the incoming call information is sent to the telephone during the call.

Further, the second invention is characterized in that the above-mentioned busy call information is a sound source.

[0009]

According to the first aspect of the invention, when a new call arrives at the telephone that is currently on the line, the caller information identified by the identifying means is associated with the busy call information by the associating means. Busy call information corresponding to call originator information is notified to the busy telephone by the sending means.

Furthermore, according to the second aspect of the invention, a busy call notification is sent to the telephone that is in use using the sound source.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a block diagram showing a private branch exchange as an embodiment of the exchange according to the present invention, and the private branch exchange 1 has one end connected to an ISDN network 2 and the other end connected to an analog telephone 3. It is connected.

Reference numeral 4 denotes an extension interface unit that accommodates the extension of the analog telephone 3 and performs predetermined extension control, and 5 indicates a first ISDN line 6 and a second I/O line from the ISDN network 2.
This is a line interface unit that accommodates an ISDN line such as the SDN line 7 and performs predetermined line control. Reference numeral 8 represents a time division switch for switching communication paths.

Reference numeral 9 denotes a first busy ringing sound source; 10 denotes a second busy ringing sound source; the first and second busy ringing sound sources 9 and 10 provide different busy ringing information; can be sent to the called party. Reference numeral 11 denotes a hold sound source, which is used when temporarily interrupting a call with the other party who is currently talking. 12 is a ROM and RA for storing various control information
13 is a central control section that controls the above-mentioned sections (time division switch 8, first and second busy ringing sound sources 9, 10, etc.).

In the private branch exchange 1, when a call is made from the analog telephone 3 (user A is the user) to the first ISDN line 6 (the user is user B),
As shown by arrow a, the analog telephone 3 and the first ISD
N line 6 is connected, and user A and user B are in a conversation state. In this state, when the analog telephone 3 receives a call from the second ISDN line 7 (user C is the user), since users A and B are busy, the memory 1
The calling number and busy call information stored in the central control unit 1
3, and the first or second busy ring tone source 9 or 10 sends a busy ring tone to user A, as shown by arrow b or arrow c, in accordance with the calling number. That is,
User A can hear the desired busy ringtone while connecting to user B. If user C is the other party that should be prioritized over user B, the call on the first ISDN line 6 is disconnected and the call is switched to the second ISDN line 7 as shown by arrow d.
User C can communicate with User C by setting up a communication path with User C. On the other hand, if user B should be prioritized over user C, user A can continue the conversation with user B while ignoring the busy ringtone.

Further, in this embodiment, if user C does not know the priority level from only the first and second busy ringtone sources 9 and 10, call waiting is activated and the call is temporarily communicated with user B. The call is put on hold, and as shown by arrow e, a hold tone is played from the hold sound source 11 to user B, and the call path is switched from arrow a to arrow d to call user C.
You can also start a call with.

FIG. 2 is a flowchart showing a control procedure when user A receives an incoming call from user C during a conversation with user B.

First, when a dial-in call is received from user C to user A, a predetermined ISDN call control message is exchanged between the central control unit 13 and user C. When dialing in, the call control message includes a called number for specifying the called destination, so the central control unit 13 analyzes it (step S20).
1). Next, it is determined whether the called party (user A) is busy (step S202). If it is determined that the called party is busy, it is determined whether or not there is a calling number (step S203). That is, the central control unit 13 analyzes the calling number indicating the caller included in the call control message, and determines whether or not there is a calling number. If there is a calling number, select the corresponding busy ringtone (step S2
04), the selected busy ringtone (first busy ringtone source 9) is sent to the called party (step S206).

On the other hand, in step S203, if there is no calling number in the call control message, a predetermined busy ringtone (second busy ringtone source 10) is selected (step S205), and the called party The selected busy ringtone is sent to the user (step S206).

[0020] In step S202, if the called party is not busy, by sending a ring tone to the called party (
Needless to say, after step S207), when the called party goes off-hook, the call state is established.

FIG. 3 is a format diagram showing a correspondence table between calling numbers and busy ringing sound sources stored in the memory 12.

That is, for example, the calling number of user C is 2.
22-2222, the busy ring tone is determined to be "1" from this correspondence table, so the central control unit 13 connects the communication path between user A and user B (as shown by arrow a in FIG. 1). In addition, a call path is connected from the first busy ringing sound source 9 in the direction of user A (indicated by arrow b in FIG. 1), and
Let the user hear the busy ringtone "1". In addition, it is not necessary to store the correspondence table for each individual calling number; for example, if you want to set all calls from within Tokyo's 23 wards to busy ringtone "1", use the upper two digits of the calling number, "03". can be stored as a calling number in the correspondence table, and all busy ringtones for that number can be set to "1". In addition, in this correspondence table, if there is no calling party number for user C, "2" is selected as the predetermined busy ringtone, and in addition to the call path shown by arrow a, a second busy ringtone is transmitted from the second busy ringtone source 10. A call path in the direction of user A is connected (indicated by arrow c), and user A is made to hear the busy ring tone "2".

[0023] In this way, in the private branch exchange 1 having the above-mentioned busy call processing function, the user A who has been informed of the busy call can identify the caller of the busy call depending on the type of the busy ring tone. can be inferred. And user B
If the call is more important and the call time is likely to be longer, you can end the call with user B and start a call with user C. It is possible to ignore the incoming call from user C and continue the conversation with user B.

[0024] In the above embodiment, the first ISDN
Since the line 6 is on the hold side and calling number information is not required, an analog line may be used instead of the ISDN line (digital line). Furthermore, step S20 in FIG.
If it is determined in step 3 that there is no calling number, a sound source that is not in the correspondence table may be stored in advance and the sound source may be selected.

FIG. 4 is a block diagram showing a second embodiment of a private branch exchange as an exchange according to the present invention, and the private branch exchange 14 has two extension telephones at one end (a first extension telephone 15 and a second extension telephone 16), and the other end is equipped with a display section 17 consisting of an LED (light emitting diode).
ion Tele-phone (MFT).

19 is an MFT interface unit that accommodates the line of the MFT 18 and performs predetermined line control; 20 is a first
and an extension interface section that accommodates the extensions of the second extension telephones 15 and 16 and performs extension control.

[0027] Therefore, 21 is a tone ROM,
Various sound sources are sent to the MFT 18 or extension telephones 15 and 16 depending on caller identification information and the like.

In the private branch exchange 14, the MFT 18
(assuming the user is user D) to the first extension telephone 15
When a call is made to (assuming the user is user E), the arrow f
As shown in , the MFT 18 and the first extension telephone 15 are connected, and the user D and the user E are in a conversation state. In this state, when a call is made to the MFT 18 from the second extension telephone 16 (the user is user F), the called party number and caller identification information (location information where the extension telephone 16 is accommodated in the extension interface section 20 ) is extension interface section 2
0 to the central control unit 13. Next, as in the first embodiment, when the central control unit 13 receives the called party number, it analyzes it, and if the called party is busy, it collects the caller identification information in order to determine the busy call display method. Then, using the correspondence table stored in the memory 12, the caller identification information and the busy ring tone source are selected to select the busy ring tone, and the desired tone is transferred from the tone ROM 21 to the MFT 18 as shown by arrow g. Sends a busy ringtone. Also, if you want to put the call with user E on hold and talk to user F, use the tone ROM.
21 to the arrow h, a hold tone is played to the user E, and the communication path is switched from the arrow f to the arrow i.

In this way, in the second embodiment,
Tone ROM 21 that stores various sound sources including hold music
By using a single component, a plurality of different sounds can be used as a busy ring tone and a holding tone, and the device can be simplified.

FIG. 5 is a time chart showing an example of the output pattern of the busy call ringing sound source stored in the tone ROM 21, in which the on time and off time of the busy call sound "1" are set to the same time. In this case, the busy call ringing sound source "2" shows a case where the on time and the off time are set to different times. Further, the busy ringtone is not limited to the above-mentioned intermittent pattern, and may be configured to have different frequencies.

Further, the extension telephones 15 and 16 may be analog telephones or MFTs.
When analog telephones are used as the extension telephones 5 and 16, the extension interface section 20 can be replaced with the extension interface section 4 of the first embodiment, and when an MFT is used as the extension telephone, the extension interface section 20 is an MFT interface. Needless to say, it can be replaced with part 19.

Furthermore, in the second embodiment, M
Since the FT 18 includes a display section 17 having various LEDs (light emitting diodes), it is also preferable to display a busy call by turning the display section 17 on and off. In this case, the central control unit 13 sends a command to the MFT 18 to make the display unit 17 flash or turn on, and then, in substantially the same way as described above, the display unit 17
By changing the blinking pattern and color of 7, multiple busy calls can be displayed.

If the incoming call is displayed by turning the display section 17 on and off in this manner, the incoming call can be confirmed visually, which also has the effect of making it easier to recognize the incoming call.

[0034]

Effects of the Invention As described in detail above, the exchange according to the first invention includes an identification means for identifying caller information sent from a caller, and a plurality of different pieces of busy call information to the telephone. and a linking unit that matches the caller information with the busy call information, and when a new call arrives at the telephone that is currently on the line, the linking unit sends the call. The busy call information corresponding to the user information is selected, and the selected busy call information is sent to the busy telephone by the sending means, so that when a new call arrives at the busy telephone, The caller information identified by the identification means is associated with the busy call information by the association means, and the call busy information corresponding to the caller information of the call is notified to the telephone in use by the sending means. be done.

[0035] Therefore, the user who receives the busy call information can either continue the conversation with the user who is talking or interrupt the conversation with the user who is talking, depending on the importance (priority) of the calling user. It is possible to easily determine whether to talk to the calling user who received the busy call, and the user who has received the busy call information can take an appropriate response to the busy call.

[0036] Furthermore, in the switching system according to the second invention, the busy call information is constituted by a sound source, so that a busy call notification is sent to the telephone that is currently talking using the sound source, and the user who receives the busy call notification can You can check its importance and priority based on the sound source.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment (first embodiment) of an exchange according to the present invention.

FIG. 2 is a flowchart showing a control procedure of an exchange according to the present invention.

FIG. 3 is a format diagram showing an example of a correspondence table used in the exchange according to the present invention.

FIG. 4 is a block diagram showing a second embodiment of the exchange according to the present invention.

FIG. 5 is a time chart showing an example of a busy ring tone output pattern used in the second embodiment.

[Explanation of symbols]

3 Analog telephone (telephone)

Claims (2)

[Claims] Claim 1: When a new call arrives at a telephone that is currently on the phone, an exchange that sends the busy call information to the telephone has an identification means that is different from the one that identifies the caller information sent from the caller. A transmitting means for transmitting a plurality of pieces of the busy call information to the telephone set, and an association means for associating the caller information with the busy call information, so that when a new call arrives at the telephone set during a call, In this case, the associating means selects the busy call information corresponding to the caller information of the call, and the sending means sends the selected busy call information to the busy telephone. exchange machine. 2. The exchange according to claim 1, wherein the busy call information is a sound source.