JPH0818661A - Station terminating sound ringing method - Google Patents

Abstract

PURPOSE:To provide a station terminating sound ringing method for ringing station terminating sound from a pertinent telephone set for which call termination is requested by hardware control. CONSTITUTION:By a sound source memory 5 for storing the data of continuous sound used for the station terminating sound, a digital switch 3 used for connecting a speech path 30 and a trunk line interface circuit 2 for converting call signals transmitted from a public communication network 1 to the signals of a logical level and performing turn-on and turn-off in synchronism with the signals, the station terminating sound synchronized with the intermittent pattern of the call signals from the public communication network 1 is rung from a terminating terminal for which the call termination is requested.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ringing tone ringing method for a digital electronic exchange or a digital key telephone system.

[0002]

2. Description of the Related Art FIGS. 3 to 5 show a conventional method for ringing a local tone from a terminal that receives a call in a digital electronic exchange or a digital key telephone system.

In FIG. 3, the control unit 17 monitors the station line interface circuit 13 and the extension interface circuit 15,
Alternatively, the digital switch 14 and the sound source memory 18 are controlled. The office line interface circuit 13 forms an interface with the public communication network 25, and an incoming call detection circuit 24 for detecting a calling signal from the public communication network 25 is provided therein.

The extension interface circuit 15 forms an interface with the digital telephone 16. FIG. 5 shows the internal configuration of the digital telephone 16. The speaker 23 sends voice and local ringing sound to the outside, and the CODEC is used.
22 exchanges a digital signal sent to the telephone with an analog signal or converts an analog signal sent from the telephone into a digital signal. Further, the control unit 33 is the control unit 1.
7 and the CODEC 22
ON / OFF control of.

In FIG. 3, the digital switch 14 connects a speech path 30 between the tone generator memory 18 and the extension interface circuit 15 or the office line interface circuit 13.

As shown in FIG. 4, the sound source memory 18 is composed of a digital memory 19 and an analog memory 20. However, when using the analog memory 20,
As shown in FIG. 4, the CODE is connected between the digital switch 14 and
R21 is required.

Next, the operation of the above conventional example will be described.
In FIG. 3, when a call signal is sent from the public communication network 25, this is detected by the incoming call detection circuit 24 in the station line interface circuit 13, and an incoming call request is sent from the public communication network 25 to the control unit 17. Inform you that you are Upon receiving this information, the control unit 17 controls the digital switch 14 to form the communication path 30 in order to connect the sound source memory 18 and the extension interface circuit 15 that accommodates the digital telephone 16 that has made an incoming call request. Then, the sound source memory 18 outputs a signal for local arrival sound. At this time, the control unit 17 controls ON / OFF of the speaker 23, the CODEC 22 of FIG. 5, or the digital switch 14 forming the communication path 30 in the same cycle as the intermittent pattern of the calling signal, so that the public communication network It is possible to ring the local ringing tone in synchronization with the ringing signal from 25 from the corresponding called telephone. Also, by storing a signal for the local tone that is stored in the sound source memory 18 so as to have the same intermittent pattern as the calling signal from the public communication network 25,
A similar ringing can be realized.

As described above, in the conventional digital electronic exchange and digital key telephone apparatus, the method of ringing a local tone is performed by the control of the control unit 17, that is, the software control, or the local tone is stored in the tone generator memory 18. It is realized by storing continuous sound and silent data for use. At this time, the cycle of the local ringing tone and the silence is the same as the ringing signal, but the timing of ringing is not synchronized.

[0009]

However, in the conventional ringing tone ringing method described above, since the ringing tone ringing is controlled by software, there is a problem that the load on the software increases. Furthermore, in order to store the signal data of the same period as the intermittent pattern of the calling signal from the public communication network, it is necessary to store the silent data as well, so that a large capacity is required as the memory capacity of the sound source memory. was there. The present invention solves such a conventional problem, only by controlling the hardware,
Even if the local ringing tone is sounded at the same cycle as the ringing signal from the public communication network and the timing of the ringing is synchronized, and even if it is not controlled by software, the same as above by using a small capacity sound source memory. It is an object of the present invention to provide a method for realizing the ringing sound of the local ringtone.

[0010]

In order to achieve the above object, a method for ringing a local tone according to the present invention is provided for connecting a sound source memory storing data of continuous tones used for local tone and a communication path. The corresponding destination terminal that has made an incoming call request by the digital switch used and the station line interface circuit that converts the ringing signal sent from the public communication network into a signal of logical level and turns on / off in synchronization with the signal. From the public communication network, the local ring tone is sounded in synchronization with the intermittent pattern of the calling signal from the public communication network.

[0011]

In the local tone ringing method according to the present invention, an intermittent pattern generating circuit is provided in the central line interface circuit, and the intermittent pattern generating circuit is interposed in the communication path connecting the tone generator memory and the extension interface circuit. This intermittent pattern generating circuit turns on / off the communication path so that a ringing tone is produced in synchronization with a calling signal from the telephone line.

Therefore, according to the present invention, the ringing of the local tone can be performed by controlling the hardware. As a result, the load on the software of the control unit can be reduced, and the memory capacity of the sound source memory can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, reference numeral 2 is an office line interface circuit, and as shown in FIG.
0 detects a calling signal sent from the public communication network 1,
Notify the control unit 9 that an incoming call is coming. Further, the office line interface circuit 2 has a built-in intermittent pattern generating circuit 11 having a switching element which converts a calling signal into a signal of a logic level and operates in synchronization with the signal.

An extension interface circuit 4 forms an interface with the digital telephone 12. Three
Is a digital switch, which is a space type switch (S switch) or a time type switch (T switch). Recently, it is common to use T-switches,
Since this type of switch is being integrated into an LSI, it is preferable to use an integrated T switch as a digital switch.

A control unit 9 monitors the station line interface circuit 2 and the extension interface circuit 4, and controls the digital switch 2 and the tone generator memory 5. Reference numeral 5 denotes a sound source memory, which is provided with a digital memory 6 in which data of various service tones including local arrival sounds is built.

Next, the operation of the above embodiment will be described.
In the above embodiment, when a call signal is sent from the public communication network 1, the incoming call detection circuit 10 in the office line interface circuit 2 detects it and notifies the control unit 9 that an incoming call is coming. When the control unit 9 receives this notification, it controls the digital switch 3 and, as shown in FIG.
A call path 30 for connecting the extension interface circuit 4 accommodating the digital telephone 12 that has made an incoming call request via the intermittent pattern generation circuit 11 is formed.

After that, when data for local tone is transmitted from the sound source memory 5, it is input to the extension interface circuit 4 via the communication path 30 and the local tone is sounded from the digital telephone 12 which has made an incoming call request. . At this time, by synchronizing with a calling signal from the public communication network 1 and turning on / off the switch of the intermittent pattern generation circuit 11,
The speech path 30 connecting the sound source memory 5 and the extension interface circuit 4 is turned on / off in synchronization with this. As a result, the data for the ringtone is also interrupted, so the public communication network 1
It is possible to ring a local ringing tone from the corresponding telephone at the same period as the intermittent pattern of the ringing signal from the telephone and the ringing timing is synchronized with the ringing signal.

As described above, according to the above embodiment, the communication path 30 for transmitting the data of the local tone from the sound source memory 5 to the extension interface circuit 4 is connected to the intermittent pattern generating circuit 1.
1 has an effect that the ringing tone is synchronized with the calling signal from the public communication network 1 by controlling hardware so that the ringing tone is synchronized with the calling signal.

Further, according to the above-mentioned embodiment, since the local tone data is transmitted and received as a digital signal, the communication path used for transmitting and receiving the voice data can be used, and the local tone can be transmitted. This has an effect that it is not necessary to newly provide a transmission line for transmission and reception.

Although the digital sound source memory 6 is used as the sound source memory 5 in the above embodiment, the sound source memory 5
May be the analog sound source memory 7. In this case, a CODER for converting an analog signal into a digital signal
Although 8 is required, it has an effect that the types of service tones can be expanded as compared with the case where the digital sound source memory 6 is used.

[0021]

As is apparent from the above embodiment, the local tone ringing method according to the present invention synchronizes the local ringing continuous signal transmitted from the sound source memory with the ringing signal transmitted from the public communication network. By turning on and off, it is possible to realize the ringing of the local ringing tone from the relevant phone that has made an incoming call request by controlling the hardware, and the role of software can be reduced, so the entire system can be reduced. It has the effect of reducing the load on the software. Further, the memory capacity of the sound source memory used can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating a ringing tone ringing method according to the present invention.

FIG. 2 is a block diagram of the office line interface circuit in FIG.

FIG. 3 is a configuration diagram illustrating a conventional ringing tone ringing method.

FIG. 4 is a block diagram of a conventional sound source memory.

FIG. 5 is a block diagram of a digital telephone.

[Explanation of symbols]

 1 Public Communication Network 2 Station Line Interface Circuit 3 Digital Switch 4 Extension Interface Circuit 5 Sound Source Memory 6 Digital Sound Source Memory 7 Analog Sound Source Memory 8 CODER 9 Control Unit 10 Incoming Call Detection Circuit 11 Intermittent Pattern Generation Circuit 12 Digital Telephone 30 Call Path 31 Control Bus

Claims (1)

[Claims] 1. A sound source memory storing continuous tone data used for local tone, a digital switch used for connection of a communication path, and a call signal sent from a public communication network into a logical level signal. Convert and turn ON / O in synchronization with the signal
A ringing tone ringing method for ringing a ringing tone in synchronism with an intermittent pattern of a calling signal from a public communication network from a corresponding called terminal that has made an incoming call request by a FF station line interface circuit.