JPH0750949B2 - Tone signal transmission control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a time division electronic exchange, and more particularly to a tone signal transmission control system thereof.

(Prior Art) Conventionally, in the tone signal transmission control of this type, the input side time slot of the switch is assigned for the tone signal, and switching is performed similarly to the voice signal to transmit the tone signal to the subscriber telephone set. .

(Problems to be Solved by the Invention) In the above-described conventional tone signal transmission control method, since the input side time slot of the switch must be allocated for the tone signal, all the input side time slots of the switch are subscribers. It has the drawback that it cannot be allocated for telephones and that the power of the switch cannot be fully utilized. In a system with a multi-stage switch configuration, tone signals cannot be sent unless all the switches are controlled. There is a drawback that.

It is an object of the present invention to switch a voice signal in a tone signal transmission control system of a time-division electronic switching system which detects a change in state of a subscriber telephone and supplies a voice signal or various tone signals to the telephone. At the same time, various tone signals are generated and switched, and by selecting either the voice signal or the tone signal at the output side, the above drawbacks are eliminated and the switch performance is sufficiently exhibited. It is to provide a tone signal transmission control system.

(Means for Solving Problems) The present invention relates to a voice signal write address generation counter, a voice signal control memory, a voice signal memory switch, a control memory read address generation counter, and a tone signal generation circuit. A tone signal control memory, a tone signal memory switch, and a selection circuit.

The voice signal write address generation counter generates a voice signal write address.

In the audio signal control memory, information of an arbitrary input side time slot is written at an address corresponding to the output side time slot.

The voice signal memory switch has an address corresponding to the input time slot, stores the voice signal in the write address sent from the voice signal write address generation counter, and reads it from the read address sent from the voice signal control memory. Switching is performed by reading an audio signal.

The control memory read address generating counter generates a control memory read address.

The tone signal generation circuit is for generating various tone signals.

The tone signal control memory selects tone type information, which is the read address of the tone signal memory switch, and whether to send a voice signal or a tone signal to the address corresponding to the output time slot. Selection information for writing.

The tone signal memory switch accumulates various tone signals generated by the tone signal generation circuit, receives the control memory read address generated by the control memory read address generation counter, and outputs the read address from the tone signal control memory. The selection information is read, and switching is performed by reading the tone signal from this read address.

The selection circuit selects either the voice signal read from the voice signal memory switch or the tone signal read from the tone signal memory switch according to the selection information read from the tone signal control memory and supplies it to the subscriber circuit. It is a thing.

(Example) Next, this invention is demonstrated with reference to drawings.

FIG. 1 is a block diagram showing an embodiment of a tone signal transmission control system according to the present invention.

FIG. 1 shows a switch circuit of a time-division switch formed by a single-stage switch. In FIG. 1, the switch 10
1 is a voice signal memory switch 103 for switching a voice signal converted into an 8-bit time division signal, and a voice signal control memory 104 for controlling the voice signal memory switch 103 to perform switching. A tone signal memory switch 105 for switching a tone signal converted into an 8-bit time division signal, a tone signal control memory 106 for controlling the tone signal memory switch 105 to perform switching, and a voice signal. And a tone signal, a selection circuit 107, a tone signal generation circuit 108, a timing circuit 109, a central control unit 102, and a voice signal writing for generating a voice signal writing address. An address generation counter 110 and a control memory read address generation counter 111 for generating a control memory read address are configured.

Next, the operation of this embodiment will be described.

Time division switch using memory as shown in this embodiment
A central control unit 102 stores an exchange signal such as a voice signal temporarily in a voice signal memory switch 103, associates a memory address of a voice signal control memory 104 with an output time slot output from a selection circuit 107. According to the control of 1, the information of the arbitrary input side time slot is written in the voice signal control memory 104. It is generally well known that this controls the read timing of the audio signal memory switch 103 to perform switching.

Similarly, the tone signal memory switch 105 stores the tone signal converted into an 8-bit time division signal, and makes the memory address of the tone signal control memory 106 correspond to the output side time slot output from the selection circuit 107. , Central control unit
Tone signal selection information for selecting an arbitrary tone signal in the tone signal control memory 106 under the control of 102, and selection information for selecting whether to send a voice signal or send a tone signal. Write in. On the other hand,
Voice signal control memory 104 and tone signal control memory 106
And are similarly read in correspondence with the output side time slot, and the selection circuit 107 is controlled by the selection information of the voice signal or the tone signal output from the tone signal control memory 106. When the selection information is a voice signal, the voice signal is read from the voice signal memory switch 103 according to the information read from the voice control memory 104,
Output from the switch via the selection circuit 107. When the selection information is a tone signal, the tone signal control memory 106
The tone signal is read from the tone signal memory switch 105 in accordance with the tone signal selection information read from, and output from the tone signal memory switch 105 via the selection circuit 107.

FIG. 2 is a block diagram showing an embodiment in which the tone signal transmission control system according to the present invention is applied to a multi-stage switch circuit network.

FIG. 2 exemplifies the case where the time division switch has two stages.
In this case, the tone signal transmission circuit only needs to be prepared for the time division switch 206 at the final stage, and the central controller 216 can easily perform the tone signal transmission control by performing the same control as the switch at the final stage. It can be carried out.

In FIG. 2, 201 and 206 are time division switches and 2 respectively.
02,207 are voice signal memory switches, 203,208
Are voice signal writing address generation counters, 204 and 20, respectively
Reference numeral 9 is a voice signal control memory, 205 and 210 are control memory read address generation counters, 211 is a tone signal memory switch, 212 is a tone signal control memory, and 2 is a tone signal control memory.
13 is a tone signal generation circuit, 214 is a selection circuit, 215 is a timing circuit, and 216 is a central control unit.

(Effects of the Invention) As described above, the present invention detects tone signal changes in a subscriber's telephone and supplies tone signals or various tone signals to the telephone, and controls tone signal transmission in a time-division electronic switching system. In this method, the time signal on the input side of the time division switch is selected by switching the voice signal and generating and switching the tone signal and selecting either the voice signal or the tone signal on the output side of the time division switch. It is not necessary to allocate slots for tone signals, all time slots on the input side of the time division switch can be allocated for subscriber telephones, and tone signal transmission control is easy even in a time division switch system with a multistage configuration. The effect is that it can be done.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a tone signal transmission control system according to the present invention. FIG. 2 is a block diagram showing an embodiment in which the tone signal transmission control system according to the present invention is applied to a multistage switch circuit network. It is a figure. 101 …… Time division switch 102,216 …… Central control unit 103,202,207 …… Voice signal memory switch 104,204,209 …… Voice signal control memory 105,211 …… Tone signal memory switch 106,212 …… Tone signal control memory 107,214 …… Selection circuit 108,213 ...... Tone signal generation circuit 109,215 …… Timing circuit 110,203,208 …… Voice signal writing address generation counter 111,205,210 …… Control memory read address generation counter 201,206 …… Time division switch

Claims (1)

[Claims] 1. A voice signal write address generation counter for generating a voice signal write address, a voice signal control memory in which information of an arbitrary input time slot is written at an address corresponding to an output time slot, and an address. Corresponding to the input time slot, by accumulating a voice signal in the write address transmitted from the voice signal write address generation counter, and reading the voice signal from the read address transmitted from the voice signal control memory. A voice signal memory switch to be switched, a control memory read address generation counter that generates a control memory read address, a tone signal generation circuit that generates various tone signals, and an address corresponding to the output side time slot. Read address of the tone signal memory switch A tone signal control memory in which certain tone type information and selection information for selecting whether to transmit a voice signal or a tone signal are written, and various tones generated by the tone signal generating circuit. A signal is accumulated, a control memory read address generated by the control memory read address generation counter is received, a read address and selection information are read from the tone signal control memory, and a tone signal is read from this read address. A tone signal memory switch that switches by means of a tone signal, and a tone signal read from the tone signal memory switch or a tone signal read from the tone signal memory switch according to selection information read from the tone signal control memory. A selection circuit for selecting and supplying to the subscriber circuit. Tone signal transmission control method, characterized in that the to configuration.