JPH01202063A - Two-group conference telephone connection system - Google Patents

Abstract

PURPOSE:To improve the convenience by providing the system with a call end detecting means for supervising a 400Hz busy tone generated from a main wire by a filter circuit and detecting that a calling subscriber hooks on a transmitter/receiver. CONSTITUTION:A corresponding channel switch in a channel switching circuit 6 is actuated by a connection button on a manual switching operation board 16 to connect a main wire connected to a switch matrix in an XY2 direction. A receiving board opens all channel switching contacts from a call loop connected by depressing a conversation button on the operation board 16 to a holding sound source circuit 8, a receiving board calling circuit 9 and a conference telephone circuit 10. When any one of users ends his or her call and hooks on the transmitter/receiver, a 400Hz intermittent busy tone is generated from the main wire and detected by the filter circuit 5 and a busy tone lamp 13 is turned on. At the time of confirming the ON of the lamp 13, the operator of the receiving board depresses the connection button on the operation board 16 again to open the channel switch.

Description

[Detailed description of the invention] (a) Industrial application field The present invention divides a station line group into two and assigns a buyer and seller market, such as an exchange, to each group to enable telephone marketing. ing. Users can enter into transactions as either sellers or buyers by dialing either of the representative numbers. Users who participate in a transaction on this conference call can listen to everyone's calls at the same time and make further comments. The intermediary can use the reception desk to operate the contract between the seller and the buyer. The present invention relates to a two-group conference call connection method in which the contracting parties are automatically disconnected from the conference call and can directly proceed to one-on-one dialogue for individual negotiations.

(b) Conventional technology Modern collective telephone equipment for business establishments has basic functions such as automatic calling from within the area (within the same office) to outside the area (via the exchange equipment of the telephone office), and automatic reception of calls from outside the area to within the area. In addition to these functions, additional functions include automatic forwarding and conference calls. Automatic forwarding is a function that allows the caller to transfer an incoming call from outside the area by hooking the caller's own phone and dialing the called number.For conference calls, the caller can call two phones within the area from one phone in succession. , three people were talking on the phone at the same time.

(c) Problems to be solved by the invention A ring tone is generated every time there is an incoming call in a group of central office lines participating in a conference call, and the operation of lifting the handset is cumbersome, making the operation even more difficult. Inquiring about the person's intention to enter the group, identifying the group, and then linking them has made the linking process very complicated. Therefore, it was necessary to divide the group of central office lines from the exchange into two in advance, give each one a representative number, and make it possible to determine the intention of the caller by knowing which group it belonged to when a call was received. Since the number of users is unspecified and it is impossible to predict when they will join, it was necessary to automatically receive a call and turn on the incoming call lamp to notify the reception desk that a call loop had occurred. When this reception desk receives a large number of automatic calls from users, the users may have to wait until they are routed to the FM phone, and it is necessary to have them wait until the reception desk is ready to receive calls. During the conference call, discussions and transactions continue on a predetermined theme, and participation in this conference call is reserved for members only, and participants are accepted at the reception desk before being transferred to the conference call. There was a need. Conference calls require a special moderator to facilitate the meeting so that all participants can hear their opinions, and other broadcasting equipment is required so that many participants can ask questions and speak at the same time via a central group telephone facility. was there. Under these circumstances, in order to smoothly extract one participant from each group and proceed with a one-on-one conversation without interrupting the ongoing conference call, the reception desk (which also serves as the moderator) must be operated. It was necessary to switch the call loop for the participant in question to the reception desk and confirm the intention of both parties to have a conversation at the reception desk. At the reception desk, it was necessary to connect the call loops of both groups selected from each group and to cut off the connection to the reception desk. In this way, a conversation begins between two arbitrarily selected parties, but when one of the users hangs up the handset at the end of the call, the exchange transmits an intermittent busy tone of 400 Hz, but this signal It was necessary to automatically detect the situation and know when to restore the central office line between the two sides.

(d) Means for Solving the Problems A description will be given below using the block circuit diagram shown in FIG. 1 showing an embodiment of the two-group conference telephone connection system of the present invention.

The group of office lines that participate in conference calls is divided into two, and each group is treated as a representative number. 16Hz 75 from the exchange
As soon as a V calling signal is detected, the call is automatically received, and a lamp is intermittently lit to notify the receiving desk of the call.

When the hook switch of the automatic call reception/recovery circuit (4) is closed due to automatic call reception, the central office lines L1 and L2 are respectively connected to the hold sound source circuit (8). Reception desk call circuit (9) by manually switching the call loop route on the reception desk
If you switch to , the hold music will switch to a call with the reception desk. Furthermore, by switching to the conference phone circuit (10) using the manual switching button, it becomes possible to participate in a conference call. In this way, by operating the manual switching operation panel (16) on the reception desk, the connection of the telephone call loop of the central office line is automatically switched, the hold tone,
Reception desk calls, conference calls, and their service functions can be switched arbitrarily. One person from each group is selected from among the users participating in the conference call, and in order to confirm the intention of both parties to have a dialogue, call route display bags ff (1) are placed at the reception desk.
2) Confirm that the call lamp of the relevant user in each group is lit, and switch the connection of the call loop from the conference call to the reception desk call.0 When connecting the relevant station line for dialogue between both parties, The corresponding communication path switch in the switching circuit (6) is operated by the connection button on the manual switching operation panel (16) to connect the corresponding office lines in the two XY directions connected to the switch matrix. In this state, the call loop of the reception desk is also connected to the calls between connected users, so the reception desk can switch from the connected call loop to the hold sound source circuit (8) by pressing the dialogue button on the manual switching operation panel (16). ), reception desk telephone circuit (9), conference telephone circuit (10)
) Open the communication path switching contacts to all circuits. If you press the reception button on the manual switching operation panel (16) at the necessary time, you can make a call from the reception desk, but if you press the dialogue button, it will be disconnected and you will return to the original one-on-one connected dialogue. Can be done. When one of these users ends the call and hangs up the handset, an intermittent 400 Hz busy tone is generated from this central office line.The busy tone from the 9th central office line is detected by the filter circuit (5) and the busy tone lamp (
13) is turned on in accordance with the intermittent frequency of 400Hz. When the reception desk confirms this, it presses the connection button on the manual switching operation panel (16) again to open the corresponding communication path switch. When the reception desk further presses the recovery button of both parties, the communication path control port i
? l! (11) opens the hook switch in the automatic call reception/recovery circuit of the concerned office line, turns off the call lamp (15), and switches Ll and L2 of the call path to the hold sound source circuit (8) to turn off the call lamp (15) and prepare for the next call. ) to recover.

(e) Operation A block diagram showing an embodiment of the two-group conference call connection method of the present invention shown in FIG. 1, and a call path switching circuit in an embodiment of the two-group conference call connection method of the present invention shown in FIG. This will be explained below.

The method of connecting the office lines to the hold sound source circuit (32), the reception desk talking circuit (33), and the conference telephone circuit (34) is to bundle Ll or L2 of the office line and connect them at the junction point (35). . A self-holding type communication path switching contact (29
), (30), and (31), which operate in a complex manner in conjunction with the reception button, conference button, dialogue button, and recovery button of the manual switching operation panel (16). 0 manual switching operation panel (16) where only the switch on the hold sound source circuit (32) side is a break contact and all others are make contacts.
To explain the manual switching buttons for each office line provided above, the reception button is exclusive to the other manual buttons and is connected to the reception desk call circuit (3
A call loop is connected only to 3). The conference button is also connected exclusively to the other manual buttons by the conference telephone circuit (34).
Only connect the call loop. The dialogue button cuts off all of the hold sound source circuit (32), reception desk call circuit (33), and conference phone circuit (34) from the call loop between the relevant office lines and maintains only the connected call loop.The recovery button In order to prepare for the next incoming call, the call loop is connected only to the hold sound source circuit (32) in the initial state. In a conference telephone, all office lines connected to the conference telephone circuit (34) share a communication loop, so that it is possible to talk and listen at the same time.

A representative number board is set up for each group of central office lines, which are divided into two groups according to the purpose of participating in conference calls.

These two groups of office lines are assigned and connected to the X-direction office line (25) and Y-direction office line (24) of the switch matrix in the communication path switching circuit (6), respectively. A method of connecting the station lines of users selected one by one from among them will be explained.

The communication paths (LL and L2) of the office line (23) in the communication path switching circuit (6) are connected on one side to the conference telephone for merging the communication loops, and on the other hand to the switch matrix for connection between the office lines. Each office line group forms a row in the vertical direction Y and the horizontal direction X, which are branched, and at each contact point in the two directions of 26) and (27) are provided. The communication path switches (26) and (27) are composed of four relays with make contacts. The 0 manual switching operation panel (16) uses these four relays to control the contacts where the X-direction station line (25) and the Y-direction station line (24) connect to the transformer of the station line connection circuit (28). When the connection button corresponding to the contact point in the XY two directions is pressed, L1 and L2 of the relevant office line are connected via the transformer of the office line connection circuit (28), thereby forming a communication loop between the office lines. When this connection button is pressed again, the communication path switches (26) and (27) are all operated in reverse, and the communication loops between the office lines are opened.

(f) Embodiment A block circuit diagram showing an embodiment of the two-group conference telephone connection method of the present invention shown in FIG. 1, and a call path switching circuit in an embodiment of the two-group conference telephone connection method of the present invention shown in FIG. ,
FIG. 3 shows an example of the call path display device and manual switching operation panel of the two-group conference telephone connection system of the present invention, and FIG. This will be explained below.

The station line group is divided into two groups, A group (1) and B group (2), and a representative number is assigned to each group according to the user's purpose of use.
Decide if you are in group or group B and dial. A 16Hz/75V calling signal is sent from the exchange through the central office line. When the automatic call reception/recovery circuit (4) detects this ringing signal, it immediately activates the hook switch in the circuit to close the call loop and configure a call loop (step 62).At the same time, the automatic call reception/recovery circuit (4) receives the signal. The signal is output to the call path control circuit (11) and the call lamp (15) of the call path display device (12) is turned on (step 63), and the incoming call flash (14) is set so that the line monitor lamp (43) is lit intermittently. ) is also activated (step 64), and this line monitor lamp (43) has the functions of both a call lamp (15) and an incoming call flash (14).

In addition, the office line No. (
42), (51) are A group (1), (21>, (4
0), (49>, (60) station line groups and B group (2)
, (22>, (41), (50), and (61) are all assigned consecutive numbers starting from 1.The automatic call receiving/recovery circuit (4)'s link switch is closed. At the point when the station!! (3) is connected to the hold sound source circuit (8) (step 65), the communication path to the station line connection circuit (28) in the 0 communication path switching circuit (6) is connected to the holding sound source circuit (8). The switches (26) and (27) are initially open.

Also, the call path switching contact (29) to the hold sound source circuit (8) side
is closed in the initial state and serves as a break contact, but the other call path switching contacts (30) and (31) are make contacts, so the call loop of the central office line (23) is immediately closed. It will be connected only to the hold music/source circuit (32). If an automatic call is received from another office line in parallel, the call loop for that office line will be connected to the junction point (35
), Ll and L2 are merged into the held sound source Figure 1 (3
2). In the hold sound source circuit (32), the lines L1 and L2 connected at the junction (35) are branched to form two parallel loops from L1 to L2 (44).
Set to 1. Each of these two wires is connected to a level-adjusted output signal of an audio device or the like via a rectifying transformer using a diode. The operator at the reception desk sees the flash of the line monitor lamp (43,) and confirms that there is an incoming call from the user. 0 Manual switching operation! ! (
When you press the reception button (45) of 16), the reception desk call circuit (
Only the call path switching contact (30) on the side 33) is closed, and the remaining call path switching contacts (29) and (31) are opened, allowing the user to talk to the operator at the reception desk (step 66) When the call loop of the 6-station line (23) is connected to the reception desk call circuit (33), a signal is sent from the manual switching operation panel (16) to the call path control circuit (11) to stop the incoming call flash (14). ), and the intermittent operation of the lamp is stopped.Thus, the line monitor lamp (43) of the call path display device (12) switches from franchise to lit, leaving only the call lamp (15) lit. becomes. Similar to the hold sound source circuit (32), the reception desk telephone circuit (33) branches 241 into four lines in parallel, and one telephone loop connects the level-adjusted outputs of the microphone and tape recorder through a transformer. connected to a signal. On the other hand, the operator at the reception desk can adjust the volume level and connect to the headphones (b).
) is pressed, the operation lamp of that button lights up, but when another button is pressed, the light of the previously pressed button is turned off, so that it is exclusive to the other buttons. Operate. When the conference button (46) is pressed, only the call path switching contact (31) on the conference phone circuit (34) side is closed, the remaining call path switching contacts (29) and (30) are opened, and the user is connected to the conference call. It becomes possible to join the conference call (step 67), and if participation in the conference call occurs on another office line in parallel, the call loop of that office line similarly connects to the junction point (35).
), Ll and L2 are each connected to form a conference telephone circuit (3
4). The conference telephone circuit (34), like the reception desk telephone circuit (33), branches two wires into four wires in parallel, and one telephone loop is connected to a level-adjusted microphone, audio equipment, etc. via a transformer. Connected to the output signal. On the other hand, I adjust the volume level and connect it to headphones.

Group A and Group B from among the users participating in conference calls.
When one-on-one interaction is requested between groups, the operator at the reception desk immediately disconnects the relevant user from Group A and the relevant user from Group B from the conference call.
After confirming the office line numbers of both parties, press the corresponding reception button (45) on the manual switching operation panel (16) to inquire through the reception desk that both parties have an intention to have a conversation, and then use the FIE to connect the calls between the two parties. Start of work (step 68) 0 call path switching times! I (6) is the station line group A group (21
) in the Y direction and the station line group B group (22) in the X direction to form a two-dimensional array/switch matrix of one station line. A group station line N.

When the office line No. of group B is determined, the communication path switches (26) and (27) are determined at the contact points in the two directions of XY.0 The connection button (53) of the manual switching operation panel (16) >, (27> and 1
There is a one-to-one correspondence.

The communication path switches (26) and (27) are composed of make contacts, and when activated, the station line connection circuit (28) that exists across the Y-direction station line (24) and the X-direction station line (25) is activated.
) The communication loops at both ends are connected through the transformer. The operator at the reception desk uses the manual switching operation panel (16)
Check the station line numbers of both groups, and select the A group (49).
When the connection button (53) of the contact point of the A group and the B group (50) is pressed (step 69), the call loops between the users of the A group and the B group are connected, and a call between the office lines becomes possible (step 70). At this time, the operation lamp of the connection button (53) lights up to indicate that the connection is in operation. The operator at the reception desk presses the dialogue button (
When pressing 47), all communication path switching contacts (29), (30), and (31) connected to the relevant central office line are opened, allowing the user to talk only with the other party on the connected optical central line. .

If you press the reception button (45) while the (? moving lamp) of the dialogue button (47) is lit, the operation lamp of the dialogue button (47) goes out and at the same time the operation lamp of the reception button (45) lights up. A reception desk communication circuit (33) is connected to the communication loop between office lines via a communication path switching contact (30),
The operator at the reception desk can intervene in the call between users (step 71), and a call between the two parties thus connected begins, but when one of the users ends the call and hangs up the handset, the exchange 400Hz through the central line
An intermittent (0.5 second) busy tone is sent.

The filter circuit (5) tunes to this 400 Hz signal and outputs the signal to the communication path control circuit (11). This output signal activates the busy tone lamp (13) and causes it to flash. Busy tone lamp (13
) is the line status lamp (
44) and the busy tone lamp (52) are lit intermittently (step 72).
), as soon as a flash occurs, press the corresponding linking button (53) whose operating lamp is on (step 73); when the linking button (53) is pressed again in this way, the operating lamp goes out; The communication path switch (26) in the corresponding communication path switching circuit (6)
), (27) are opened. When the operator at the reception desk confirms that the line status lamp (44) and busy tone lamp (52) on the call path display device (12) are flashing, he presses the recovery button (48) on the manual switching operation panel (16) (step 74), when the recovery button (48) is pressed, a signal is output from the call path control circuit (11) to the automatic call reception/recovery circuit (4) of the relevant office line, and the automatic call reception/recovery circuit (4)
) is opened and the line is restored. On the other hand, the call path control circuit (11) simultaneously outputs signals to the call path switching contacts (29), (30), and (31), and the call path switching contact (29) on the hold sound source circuit (32) side.
), the other call path switching contacts (30) and (31'), which are closed by this output signal and initializes the next incoming call, are opened by this output signal. The line status lamp (44) and busy tone lamp (52) are activated in conjunction with the opening of the hook switch in the automatic call reception/recovery circuit (4).
0 manual switching operation to turn off the light! (16) Recovery button (4
8), the line monitor lamp (43)
) will go out, and the call lamp (15) will also go out at this point (step 75), and this recovery button (48) will go out.
Manual switching (all operating lamps of the reception button (45), conference button (46), dialogue button (47), and recovery button (48) of the mulberry production board (16) go out in conjunction with the v1 mechanical operation of , all service functions to the relevant station line will be restored.

(G) Effects of the Invention The two-group conference telephone connection system of the present invention divides the group of office lines from the exchange into two groups and sets each group to be treated as a representative number. The user can determine the purpose of participating in the conference call by selecting one of them before dialing. By participating in a conference call, users can listen to what all participants are saying and can also discuss topics given by the moderator. When participating in a conference call, if a dialogue between two groups is required, such as a transaction negotiation, the user in question is immediately extracted from the conference call, and the two parties are connected.
This invention relates to group telephone equipment that allows one-on-one conversation. This is an extremely effective invention that can provide various service functions mainly for telephone marketing.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a block circuit diagram showing an embodiment of a two-group conference telephone connection system of the present invention.
The figure shows a call path switching circuit in an embodiment of the two-group conference telephone connection method of the present invention, FIG. 3 shows an example of the call path display device and manual switching operation panel of the two-group conference telephone connection method of the present invention, and FIG. FIG. 2 is a diagram illustrating the operation status of a two-group conference telephone connection system in an embodiment of the present invention. (1)...Group A (2)...Group B (
3)...Office line (4)...Automatic call reception/recovery circuit (
5)... Filter circuit (6)... Call path switching circuit (7)... Office line connection circuit (8)...
Hold sound source circuit (9)... Reception desk call circuit (10)
... Conference telephone circuit (11) ... Call path control circuit
(12)...Call path display device (13)...Busy tone lamp (14)...Incoming call flash (15)
)...Call lamp (16)...Manual switching operation/panel (17)...Power supply circuit (21)...A group (22)...B group (23)...Station line ( 2
4)...Station line in the Y direction (25)...Station line in the X direction (26), (27)...Call path switch (28)
...Station line connection circuit (29), (301, (31)・
...Call path switching contact (32)...Hold sound source circuit (
33)...Reception desk telephone circuit (34)...Conference telephone circuit (35)...Junction point (40)...A group (41)...B group (42)...Station tl
No (43)...Line monitor lamp (44)
... Line status lamp (45) ... Reception button (46) ... Conference button (47) ... Dialogue button (48) ... Recovery button (49) ... Group A (50) ...・B group (51)... Office line number (52) ・Busy tone lamp (53)
)...Connection button (60)...A group (6
1)...Group B patent applicant Nippon Source Co., Ltd. Figure 1 Figure 2 Figure 3

[Call path control panel] [Connection control panel]

Claims (1)

[Scope of Claims] 16Hz calls from the exchange are divided into two groups, each group is treated as a representative number, and the position of participating in the conference calls of the collective telephone equipment is made clear in advance. When the signal is detected by the automatic incoming call circuit, the lamp will indicate the incoming call, and the other two wires (L1, L2) that have already joined this conference call and have been connected will
The 2 lines thus obtained, which are newly connected to the communication lines L1 and L2 of the central office line, are made parallel and branched into 4 lines, and each 2 lines are rectified and connected to broadcasting/conference equipment via a transformer. In order to connect the conference telephone means to conduct the conference call and the participant in the conference call who requests a new one-on-one dialogue between a group of central office lines divided into two according to the purpose, it is necessary to establish a communication path between each central office line. A group of office lines divided into two is assigned and connected in the X and Y directions of the switch matrix in the communication path switching circuit that performs the connection, and a manual button is linked to the communication path switch of the XY two-way contact point of the switch matrix to initiate dialogue. A central office line connecting means that connects the communication paths between the two central office lines via a transformer and separates the two central office lines from a junction connected to the broadcasting/conference equipment, and a 400Hz busy tone from the central office line. A two-group conference telephone connection system characterized by being provided with end-of-call detection means for monitoring with a filter circuit and detecting that a caller has hung up the handset.