JPH0133071B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal system for a digital telephone that uses digital signals as signals exchanged between a telephone and an exchange.

In the conventional signaling system of digital telephones, when a call is made, only a selection signal, which is the subscriber number of the called party, is sent as a control signal for sending and receiving calls from the telephone to the exchange. Even if a signal is sent, the exchange is configured so that it is not accepted, so even if a transparent signal path is configured from the originating exchange to the terminating exchange and the terminating telephone, the signal is registered in the originating exchange in advance. Only subscriber data such as the calling party's number (calling party number) and terminal type can be transmitted to the called party's telephone, and information such as the calling party's name, called party's name, degree of urgency, etc. is transmitted each time a call is made. It has become impossible to transmit signals that change in a variety of ways.

Therefore, when receiving a call, the subscriber must: (1) Even if the calling party number is sent, if the caller made the call from a public telephone or other line, the caller will not be able to confirm the identity of the other party via off-hook; The caller cannot be known.

(2) When the same telephone is used by multiple operators, the called party cannot know the called party desired by the caller until after the call has been initiated by off-hook.

(3) The called party cannot distinguish an incoming call from a calling party from a normal incoming call, even if the call is highly urgent.

The called party cannot decide whether or not to answer if necessary, and if the call is received by someone other than the person who answered, the caller must relay the call. It is occurring.

The present invention has an object of fundamentally eliminating such conventional drawbacks, and has the purpose of providing a signal path between a telephone on the originating side and a telephone on the terminating side in the signal path exchanged between the telephone and the exchange and between the exchanges when making and receiving calls. This system is extremely effective as it provides a part (user part) that can be used by the user, adds control signals other than the selection signal sent from the calling phone to the user part, and transparently transmits the added signals to the called phone. , which provides a signaling system for digital telephones.

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

Figure 1 is a network configuration diagram of telephone lines, 1,1'
is a digital telephone; 2 and 2' are multiplexing/demultiplexing circuits for multiplexing or decomposing voice signals and control signals (transmission information signals) and transmitting them through subscriber lines; 3 is a calling exchange (digital exchange);
4 is the receiving side exchange (digital exchange), 5,
5' is a control circuit that selects a line based on the selection signal sent from the telephone and instructs the transfer of a control signal to the signal control circuits of exchanges 3 and 4, which will be described below; a signal control circuit having the function of assembling a control signal and a subscriber data signal and transferring the assembled signal to the destination exchange 4 according to instructions from the control circuits 5 and 5'; 7 is a storage device for storing subscriber data; 8 is a calling signal generating circuit. Note that dotted lines in the figure indicate the flow of control signals, and the signal control circuits 6 and 6' of the exchanges 3 and 4 are connected to each other by digital signal lines.

Figure 2 shows the digital telephone 1 in Figure 1.
1 is a block diagram showing an example of the configuration, where 9 is a subscriber line, 10 is a switch, 11 is a transmission termination section,
12 is a line termination section, 13 is a signal generation circuit having an internal memory, 14 is a signal reception circuit, 15 is a display circuit, 16 is a communication circuit, 17 is a display, 18 is a keyboard, and 19 to 21 are function buttons. Te, 1
9 is a call button, 20 is a memory setting button, 21
2 is a memory read button, 22 is a dial, 23 is a ringer circuit that sends out a ringer signal in response to a signal from the signal receiving circuit 14, 24 is a sounder, 25 is a transmitter amplifier, 26 is a receiver amplifier, and 27 is a transmitter. vessel,
28 is a receiver.

Note that FIG. 3 is a flowchart showing an example of the operating procedure when the digital telephone makes a call.

Next, the transfer operation of control signals when making and receiving calls will be explained.

In FIG. 1, selection signals are generated and assembled in response to the operation of the dial 19 of the digital telephone 1 and the operation of the keyboard 18 based on a predetermined order and number of digits, as well as the name of the calling party and the called party. The control signals indicating the name and urgency are multiplexed and
Since the control signal is sent to the separation circuit 2, the control signal is separated in the same circuit 2 and sent to the signal control circuit 6.

Further, the signal control circuit 6 sends a selection signal to the control circuit 5 of the exchange 3, and also accesses the storage device 7 to read out the subscriber number (calling party number) of the originating subscriber (read function). The read subscriber number is inserted after the selection signal sent to the control circuit 5 first, and the selection signal, calling party number, and calling party number are sent to the signal control circuit 6' of the receiving side exchange 4 in accordance with instructions from the control circuit 5. A control signal indicating the name of the calling party, the name of the called party, and the degree of urgency is transferred (first transfer function).

Note that at this time, the control circuit 5 is connected to the signal control circuit 6.
It decodes the selection signal sent from the controller, selects the communication path for the audio signal and control signal, and instructs the transfer of the control signal.

Next, the signal control circuit 6' of the destination exchange 4, which has received the control signal transferred from the signal control circuit 6 of the originating exchange 3, sends the received selection signal to the control circuit 5' of the exchange 4, and also outputs the calling signal. The generation circuit 8 is accessed and a calling signal is inserted in place of the selection signal.

On the other hand, the control circuit 5' decodes the received dial signal, selects the line of the called telephone 1', and also controls the signal control circuit 6' so that the selection signal is removed and the ringing signal is inserted. signal,
The signal is controlled to be sent to the called telephone 1' via the multiplexing/separating circuit 2' (second transfer function).

Therefore, a control signal is sent from the calling side telephone 1 to the called side telephone 1' in a predetermined order and with a predetermined number of digits, and the called side telephone 1' emits a ring tone and displays the calling number and the calling party. Receive the calling party's name, called party's name, and level of urgency.

Next, the operation of the digital telephones 1, 1' will be explained.

In FIG. 2, when the switch 10 is turned on at the time of a call, the transmission termination unit 11 uses the line current from the subscriber line 9 to extract the power necessary for the operation of the telephone, and also automatically adjusts the characteristics of the subscriber line 9. This circuit establishes synchronization between the exchanges 3, 4 and the telephones 1, 1', and the line termination unit 12 assembles or disassembles voice signals and control signals, and This is a circuit that performs speed conversion between the signal transmission speed and the effective speed of voice signals and control signals. Input using dial 22,
Next, use the keyboard 18 to enter a predetermined number of digits for the delimiter, calling party's name, called party's name, and degree of urgency, and then operate the call button 19 to display these subscriber numbers and the calling party. Signals corresponding to the calling party's name, the called party's name, and the degree of urgency are created in the signal generating circuit 13, sent to the display circuit 15, displayed on the display 17, and sent to the line termination unit 12 for transmission. It is sent to the exchange 3 via the termination section 11.

On the other hand, when a call is received, the control signal sent from the exchange 4 is sent to the line termination section 12 via the transmission termination section 11, and the control signal is separated and sent to the signal reception circuit 14.

Since the signal receiving circuit 14 sends control signals other than the calling signal to the display circuit 15, the display 17 displays the calling party number, calling party's name, called party's name, and degree of urgency in advance. displayed according to the specified display position.

However, if the call is received from a digital telephone that does not have a display, or if the call is received from a digital telephone that does not have a means to enter the calling party's name, called party's name, or the degree of emergency, the call will be processed in the same way as a conventional digital telephone. Only the ringing tone generated by the ringing signal will sound.

Note that it is not necessary to send all the control signals, and a blank signal with no information can be input and sent as necessary.

In addition, when making a call, if it takes a long time to press the call button after going off-hook and inputting the other party's subscriber number, calling party's name, called party's name, and level of urgency, the exchange 3 may time out. There is a possibility that the control signal from the telephone 1 will not be accepted, so if this possibility exists, operate the memory setting button 20 before going off-hook, and then operate the dial 22 and keyboard 18 to send the control signal to the signal generation circuit. 13, then off-hook, operate the memory read button 21 to read the control signal, and then operate the call button 19 to make a call.

However, the configurations in FIGS. 1 and 2 can be arbitrarily selected depending on the conditions, and in FIG. 3, each step can be replaced or a step can be omitted depending on the situation. The present invention is open to various modifications.

Furthermore, it goes without saying that the method of using the user part of the signal path described in the present invention can be widely applied to public networks if it is standardized as a protocol on the network terminal-to-terminal interface.

As is clear from the above description, according to the present invention, when the telephone makes a call, a selection signal and a control signal indicating the name of the calling party, the name of the called party, the degree of urgency, etc. are sent to the telephone;
The exchange adds the calling party's number to these control signals and forwards them to the destination exchange, and the destination exchange sends the calling party number, calling party name, called party name, and degree of urgency to the destination telephone. (1) The called party can identify the calling party's name and the called party's name while the ringtone is ringing, which reduces the burden of intermediary work on the called party's side. be done.

(2) Since the calling party's name and the called party's name can be known before answering, it is possible to decide whether to answer or not as necessary.

(3) Since it is possible to know before answering whether an incoming call is of high urgency, it is possible to decide whether to answer or not as necessary, similar to (2) above.

This has a significant effect on the operation of digital telephones.

[Brief explanation of drawings]

Fig. 1 is a network configuration diagram of a telephone circuit showing an embodiment of the present invention, Fig. 2 is a block diagram showing an example of the structure of a digital telephone connected to Fig. 1, and Fig. 3 is an operation when the digital telephone makes a call. This is a flowchart showing the procedure. 1, 1'... Digital telephone, 2, 2'... Multiplexing/separating circuit, 3... Originating side exchange, 4... Receiving side exchange, 5, 5'... Control circuit, 6, 6'... Signal Control circuit, 7... Storage device, 8... Calling signal generation circuit, 9... Subscriber line, 10... Hook switch, 11... Transmission termination section, 12... Line termination section, 13... Signal generation circuit, 14...Signal receiving circuit, 15...Display circuit, 16...Telephone circuit, 17
... Display, 18 ... Keyboard, 19 ... Call button, 20 ... Memory setting button, 21 ... Memory read button, 22 ... Dial, 23 ...
Ringer circuit, 24... Sounder, 25... Transmitting amplifier, 26... Receiving amplifier, 27... Transmitter, 2
8...Telephone receiver.

Claims (1)

[Scope of Claims] 1. In a digital telephone system consisting of a digital telephone and a digital exchange, there is provided a storage device for storing subscriber data including a calling party number, and a storage device for storing subscriber data including a calling party's number, and a transmission information signal sent from a calling party's digital telephone. a reading function for decoding and reading subscriber data corresponding to the calling side digital telephone from the storage device; and a first function for transmitting the subscriber data and the transmission information signal to a digital exchange that houses the receiving side digital telephone. a signal control circuit having a transfer function and a second transfer function for transferring subscriber data and transmission information signals sent from another digital exchange to a receiving digital telephone; The digital exchange is equipped with a control circuit that controls the selection of call lines for calls, and a ringing signal generation circuit that generates a ringing signal to the digital telephone of the called party. a signal generating circuit that generates a transmission information signal including the name of the called party, the name of the called party, and the degree of urgency; a signal receiving circuit that decodes the signal sent from the digital exchange; and a signal generating circuit and the signal receiving circuit. The digital telephone is equipped with a display circuit and a display device for displaying the output, and the signal control circuits of each digital exchange are connected to each other by digital signal lines, and the transmission information signal generated by the signal generation circuit of the calling side digital telephone and subscriber data read out by the digital exchange that accommodates the calling party's digital telephone,
A signal system for digital telephones that uses a digital signal line separate from a relay telephone line to transmit a call to a digital exchange that accommodates a digital telephone on the receiving side.