JPH04286448A - Background music system - Google Patents

Abstract

PURPOSE:To realize the service distributing a background music to an ISDN terminal equipment with respect to the background music system in an exchange system accommodating the ISDN terminal equipment. CONSTITUTION:An exchange in an exchange system provided with an ISDN terminal equipment 2 accommodated in the exchange is provided with a BGM sound source 3 and a BGM transmission means sending the information to a specific channel of an ISDN line. The ISDN terminal equipment is provided with a speaker 5, an idle state detection means 6 detecting an idle state of the specific channel of the ISDN line and a connection means 7 sending the information of the specific channel to the speaker 5 when the idle state detection means 6 detects the idle state of the specific channel.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION The present invention relates to a background music system, and in particular to an ISDN system for background music in a switching system to which ISDN terminals are connected.
Regarding the method of streaming to DN terminals.

0002

[Prior Art] A normal terminal connected to a conventional PBX (
Background music (B
GM) will be explained with reference to FIGS. 9 and 10. In FIG. 9, 91 is a network, 92 is a central processing unit that controls the network 91, 93 is a BGM trunk,
94 is a BGM sound source, 95 is a multifunction subscriber circuit, and 96 is a multifunction telephone. 91 to 95 constitute a PBX.

As shown in FIG. 10, as a service for conventional multifunction telephones, when a key on a multifunction telephone 96 connected to a PBX is pressed, the PBX outputs a signal to turn on the speaker of the multifunction telephone 96. There was a service in which a multi-function telephone 96 and a BGM sound source 94 were connected through a path of a network 91, and subscribers were allowed to listen to BGM.

On the other hand, recently, ISDN terminals have come to be accommodated in PBXs. In ISDN, there are two B channels for passing voice data, and these B channels are commonly connected to a plurality of ISDN terminals in the form of a bus.

[0005]

[Problem to be Solved by the Invention] Even if you try to use this B channel to broadcast BGM, the B channel will be used by multiple IS
If the ISDN terminal is shared by DN terminals and one ISDN terminal is busy, other ISDN terminals connected to this B channel
Since the DN terminal cannot use the B channel, it is not possible to send BGM to the ISDN terminal via the B channel unless some measure is taken.

[0006] For this reason, conventionally, B
GM services were not provided. An object of the present invention is to connect multiple ISDN terminals to an ISDN terminal having multiple B channels.
The purpose is to make it possible to provide BGM services even when accommodated in a DN line.

[0007]

[Means for Solving the Problems] FIG. 1 is a block diagram of the principle of the present invention. In the figure, 1 is an exchange, and 2 is an ISDN terminal accommodated in the exchange 1. According to one aspect of the present invention, the exchange 1 is configured to transmit a BGM sound source 3 and information from the BGM sound source 3 to a specific channel of an ISDN line.
The ISDN terminal 2 is equipped with a GM sending means 4, a speaker 5, a vacant state detecting means 6 for detecting the vacant state of the specific channel of the ISDN line, and a vacant state detecting means 6 detecting the vacant state of the specific channel. and a connecting means 7 for transmitting information on the specific channel to the speaker 5 when the specific channel is selected.

According to the second aspect of the present invention, in addition to the above-described configuration, the exchange 1 includes an empty detection means 8 for detecting the occurrence of an empty channel in the ISDN line, and a BGM sound source 3 for detecting the occurrence of an empty channel on the ISDN line. A connecting means 9 connects to the BGM transmitting start signal, a BGM transmitting start signal transmitting means 10 transmits a BGM transmitting start signal to the ISDN terminal 2, and a BGM transmitting start signal transmitting means 10 transmits a BGM transmitting start signal to the ISDN terminal 2. B which sends a BGM transmission stop signal to the ISDN terminal 2 and disconnects the sound source 3 from this line when used for an incoming call.
The ISDN terminal 2 is equipped with GM transmission stop means 11,
A BGM transmission start signal receiving means 12 for receiving a GM transmission start signal and a BGM transmission stop signal receiving means 13 for receiving a BGM transmission stop signal are provided, and the BGM transmission start signal is received when the specific channel is in an empty state. At times, the connection means 7 connects the particular channel to the speaker 5, and the B
When receiving a GM transmission stop signal, the channel currently transmitting BGM and the speaker 5 are disconnected.

According to a third aspect of the present invention, in addition to the above configuration, the ISDN terminal 2 is equipped with BGM transmission request means 14. According to the fourth aspect of the present invention, in addition to the above configuration, the ISDN terminal is equipped with a high quality voice decoder and decoder switching means 15 for switching between this decoder and a normal decoder, It has an audio source.

0010

[Operation] In ISDN, multiple ISDN terminals
Since it is commonly connected to the line in the form of a bus, BGM can be broadcast to multiple ISDN terminals via the bus in broadcast form, as long as a particular channel of the ISDN line is not used for a call. In order to detect that the specified channel of the ISDN line is not used for a call, the ISDN terminal is provided with an idle detection means 6 for detecting the idle state of the specified channel of the ISDN line.

[0011] The exchange 1 is also provided with an empty detection means 8 for detecting the occurrence of an empty channel in the ISDN line, and when an empty channel is detected, the BGM sound source 3 is connected to the empty channel and BGM transmission is started. Signal to ISDN terminal 2
Send to. When a call setup signal is sent from the ISDN terminal to the exchange 1, a BGM transmission stop signal is sent to the ISDN terminal 2, and the sound source 3 disconnect from this line. When the ISDN terminal 2 receives the BGM transmission start signal when the specific channel is vacant, the ISDN terminal 2 connects the specific channel to the speaker 5 using the connection means 7, and
When receiving a GM transmission stop signal, the channel currently transmitting BGM and the speaker 5 are disconnected.

Furthermore, the ISDN terminal 2 can also request BGM transmission. Furthermore, the ISDN terminal can be configured to switch between a high-quality voice decoder and a normal decoder.

[0013]

Embodiment FIG. 2 is a system configuration diagram of a background music system according to an embodiment of the present invention. In the figure, 2
01 is the network (NW), 202 is the common control device (
CC), 203 is the ISDN terminal line circuit (ILC)
, 204 is a line termination device (CT), 205 is an interface circuit (INF), 206 is a driver (D), 207
is a receiver (R), and these constitute the PBX. 208 is an ISDN digital telephone (DTEL), which includes a receiver (R) 209, a driver (D) 210,
Line termination device (CT) 211, switch (SW) 212
, controller (CTL) 213, decoder (DC) 2
14, coder (CD) 215, switch (S2) 21
6. Amplifier circuit (AP) 217, speaker (SPK) 2
18, Call circuit (SP) 219, Handset (H) 2
20, and a switch (S1) 221. Although not shown, ISDN digital telephone (DTEL) 2
7 more terminals with the same configuration as 08, ISDN line 222
Connected to PBX via.

Common control unit (CC) 20 in PBX
2, and ISDN digital telephone (DTEL) 208
The controller 213 in the ISDN line B1
The availability status of the channel and B2 channel is known. Therefore, ISDN Digital Telephone (DTEL)
A controller (CTL) 213 in 208 controls a switch (SW) 212 and a switch (S2) 216 according to the idle state of the line. Switch (SW) 212
connects handset 220 or speaker 218 to B on the line.
Select whether to connect to channel 1 or channel B2. Switch (S1) 216 connects the selected channel to speaker 218 or to handset 2.
Select whether to connect to 20. Furthermore, a switch (S1) 221 is provided as an option, and the user of the telephone selects whether or not to play BGM at his/her request.

The first to fourth embodiments of the present invention will be described below with reference to FIG.
This will be explained with reference to FIG. In each figure, the same parts as shown in FIG. 2 are given the same reference numerals. FIG. 3 is an explanatory diagram of the first embodiment of the present invention. In this embodiment, as shown in FIG. 3(a), the switch (S2) 21 in FIG.
6, the B2 channel is fixedly connected to the input of the decoder (DC) 214, and the output is fixedly connected to the speaker 218. The PBX exchange constantly sends BGM information to the B2 channel. Each terminal automatically or by the user switches 22 when it is in an idle state.
1 to connect the B2 channel to the speaker and listen to BGM.

[0016] Then, if a certain terminal makes a call, or
When a certain terminal receives an incoming call, the B1 channel is connected to the handset 220 for communication, as shown in FIG. 3(b). FIG. 4 is an explanatory diagram of the operation of the first embodiment of the present invention shown in FIG. As shown in Figure 4(a), ISDN
When digital telephones T1, T2, T3, . . . are all idle, BGM is broadcast to all terminals using the B2 channel. Further, as shown in FIG. 4(b), for example, when the ISDN digital telephone T2 is busy talking,
T2 makes a call using the B1 channel and sends B1 to other terminals.
BGM is broadcast in broadcast format using 2 channels.

FIG. 5 is an explanatory diagram of a second embodiment of the present invention. In this embodiment as well, as shown in FIG. 5(a), when all ISDN digital telephones T1, T2, T3,...
is broadcast to all terminals, and as shown in FIG. 5(b), for example, when ISDN digital telephone T2 is in a call, T2 uses the B1 channel to make a call, and other terminals receive B2. BGM is broadcast in broadcast format using the channel. Furthermore, as shown in FIG. 5(c), if another call occurs while one channel, for example, the B1 channel, is being used for a call, the other channel, the B1 channel, is also used for the call. In this way, in this embodiment, if one or more of the two channels is free, BGM can be heard, and if another call occurs while one channel is in use, the channel that is sending BGM is used for that call. Assign to BG
Stop M. When a call is assigned to a channel and the BGM is stopped, all terminals are notified that the BGM has been stopped so that other terminals do not hear the content of the call, and if one channel becomes vacant, BGM transmission is resumed. will be notified to all devices.

FIG. 6 is a sequence diagram illustrating the operation of the second embodiment of the present invention shown in FIG. As shown in the figure, all terminals T1 and T2 connected to one line of ISDN
, T3 is idle and terminal T2 makes a call, T2 requests call setup (SET UP) to exchange EX, and exchange EX receives this and accepts call setup (CALLP).
ROC) to T2. At this time, it is also notified that the B1 channel should be used. Next, the exchange EX sends a calling signal (ALER) to T2, and when there is a response from the other party at T2, a connection (CONN) is established and communication is started using the B1 channel. After this, only the B2 channel is used for BGM.

In this state, when a call is made from terminal T1,
Call setup (SET UP) from T1 to exchange EX
request. When the exchange EX receives this, it has already changed to B1.
Channel is being used for calls and B2 channel is being used for calls.
As a result, the B1 channel recognizes that it cannot be used for BGM, and sends a BGM stop signal to all terminals T1, T2, and T2.
Notify 3. Next, call setup reception (C
ALL PROC) to T1. At this time, B
2. It also notifies that the channel should be used. Next, exchange EX sends a calling signal (ALER) to T1, and
When there is a response from the other party in 1, a connection is made (CONN) and B2
Communication begins using the channel.

[0020] T2 sends a disconnection request (DISC) to exchange EX
, the exchange EX gives a release (REL) instruction to T2, and T2 sends a release completion (REL) instruction to the exchange EX.
COMP) is notified. In this state, the B1 channel is vacant and can be used for BGM. Therefore, the exchange EX notifies all terminals T1, T2, and T3 of a BGM start signal to the effect that BGM will be played using the B1 channel.

FIG. 7 is an explanatory diagram of the operation of the third embodiment of the present invention. In this embodiment, as shown in FIG.
Request GM transmission. And from now on, the exchange will be BG
BGM transmission service is performed until the channel being transmitted is used for an outgoing/incoming call, until a BGM stop request is received from the terminal, or until a BGM stop request is received from the terminal. In the center of Figure 7, the channel on which BGM is being sent is used for outgoing/incoming calls, so the switch EX
is a case where the transmission of BGM is refused, and in the lower part of FIG. 7, terminal T1 makes a request to stop BGM to exchange EX, and
In response to this, the exchange EX notifies all terminals that the BGM has stopped.

The BGM transmission request and stop request are made by the switch (S1) 221 shown in FIG. 2. FIG. 8 is an explanatory diagram of a fourth embodiment of the present invention. In this example, BGM
The signal sent from the sound source (MS) 81 is converted into a high quality digital audio signal (
7 KHz audio) and sent to the terminal 84 via a 4-wire digital network (NW) 201.

On the other hand, while receiving BGM, the terminal 84 decodes the BGM signal received from the exchange using a high quality audio decoder circuit (HQD) 86 and outputs the BG signal from the speaker 218.
Send M. For normal calls, a decoder (DC
) 214, the controller (CTL) controls the changeover switch (S3). This results in
Users can use high-quality BGM.

[0024]

As is clear from the above description, according to the present invention, BGM can be used even when an ISDN terminal is used, so that serviceability is improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the principle of the present invention.

FIG. 2 is a system configuration diagram of an embodiment of the present invention.

FIG. 3 is an explanatory diagram of the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of the operation of the system in FIG. 3;

FIG. 5 is an explanatory diagram of a second embodiment of the present invention.

FIG. 6 is a sequence diagram for explaining the operation of the embodiment of FIG. 5;

FIG. 7 is a sequence diagram for explaining the operation of the third embodiment of the present invention.

FIG. 8 is an explanatory diagram of a fourth embodiment of the present invention.

FIG. 9 is a diagram showing a BGM system in a conventional PBX.

FIG. 10 is an explanatory diagram of the operation of the method of FIG. 9;

[Explanation of symbols]

1...Switching machine 2...ISDN terminal 3...BGM sound source 4...BGM sending means 5...Speaker 6. Vacant detection means 7... Connection means 8... Vacant detection means 9... Connection means 10... BGM transmission start signal transmission means 11... BGM transmission stop means 12...BGM transmission start signal receiving means 13... BGM transmission stop signal receiving means 14...BGM transmission request means 15...Decoder switching means

Claims (4)

[Claims] Claim 1. In a switching system comprising an exchange (1) and an ISDN terminal (2) accommodated in the exchange (1), the exchange (1) has a BGM sound source (3) and an ISDN terminal (2) accommodated in the exchange (1).
BGM sending means (4) for sending information from a GM sound source (3) to a specific channel of an ISDN line;
The DN terminal (2) includes a speaker (5) and an idle detection means (for detecting the idle state of the specific channel of the ISDN line).
6), and a connecting means (7) for transmitting information on the specific channel to the speaker (5) when the vacant state detecting means (6) detects the vacant state of the specific channel. Background music method. 2. The exchange (1) includes an idle detection means (1) for detecting the occurrence of an idle channel in the ISDN line.
8), a connecting means (9) for connecting the BGM sound source (3) to the vacant channel, and a connecting means (9) for connecting the BGM sound source (3) to the vacant channel;
BGM transmission start signal sending means (1) to send to the terminal (2)
0) and in response to a call setup signal from the ISDN terminal,
BGM transmission stop means (11) that sends a BGM transmission stop signal to the ISDN terminal (2) and disconnects the sound source (3) from this line when the channel on which BGM is being transmitted is used for normal call origination/termination; ), the ISDN terminal (2) comprises a BGM transmission start signal receiving means (12) for receiving the BGM transmission start signal, and a BGM transmission stop signal receiving means (13) for receiving the BGM transmission stop signal. When the specific channel is in an empty state and the BGM transmission start signal is received, the connection means (7) connects the specific channel to the speaker (5), and when the BGM transmission stop signal is received. , a background music system characterized in that the channel in which BGM is being transmitted and the speaker (5) are separated. 3. The ISDN terminal (2) comprises BGM transmission request means (14).
Background music method described in . 4. The ISDN terminal is equipped with a high-quality voice decoder and a decoder switching means (15) for switching between this decoder and a normal decoder, and has a high-quality voice source in the exchange (1). 4. A background music system according to claim 1, wherein the background music system is characterized by: