JPH05153210A - Telephone set - Google Patents

Abstract

PURPOSE:To learn the use situation of a line at a glance before a call operation is executed, to eliminate the need of executing the wasteful call operation and to improve operability by inputting a line use situation detection result to a system control part and displaying it in LED in an operation part. CONSTITUTION:At the time of an originating call, the operation part 14 inputs a dial number and the like to the system control part 10, and sets them in a call control part 9 with the type of call/incoming call/transfer. They are multiplexed in a control channel in a communication interface part 2 and are outputted to a communication line 1. At the time of an incoming call, control information from the communication line 1 is inputted from the communication interface part 2 to the call control part 9 and it is informed to the system control part 10. A line use situation detection part 8 is connected to the communication interface part 2 and the communication circuit 1 in parallel, and it always analyzes call/incoming call information on the line and detects the use situation of the information channel. A line use situation detection result is inputted to the system control part 10 and is displayed in LED in the operation part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone using a digital line, and more particularly to a telephone having a line state detecting function for constantly displaying a call use state of a line to which a terminal is connected.

[0002]

2. Description of the Related Art Generally, in an ISDN line basic interface, as shown in FIG. 5, terminals can be connected to one digital subscriber line by bus wiring, and a maximum of eight terminals can be connected to the bus. It is possible.

In FIG. 5, 500 is a digital subscriber line (2B + D), 501 is a network terminating device, and 502 to 50.
Reference numerals 9 are terminals 1 to 8.

In the above case, considering general use, not all terminals are installed in the same place, and each terminal may be installed in a different place. When used in such a form, conventionally, when a telephone is used at a certain terminal, there is no means for knowing whether or not another terminal on the bus wiring is using the line.

[0005]

SUMMARY OF THE INVENTION In the above conventional technique,
When using a phone at one terminal, there was no way to know if another terminal on the bus wiring was using the line,
If other terminals on the bus wiring are using all lines,
Only once you made a call operation, you could find out that all your lines were in use, and there was the disadvantage of making unnecessary call operations.

For example, in FIG. 5, terminals 1 to 8 are installed in different places, and when a telephone is used at terminal 1 when terminals 7 and 8 are using the line, other terminals are connected to the line. Since there is no way to know whether or not you are using, you will not be able to know that all your lines are in use until you make a call once.

In view of the above, the present invention provides a telephone having a line use status detecting function, which is a simple solution to such a drawback.

[0008]

The telephone of the present invention comprises a plurality of information channels and a control signal channel (2B +).
A telephone connected to a digital line having D), wherein in addition to a means for inputting and outputting a signal of a transmission / reception line necessary for communication, a means for inputting at least a signal of a transmission line and a control channel for each transmission / reception line (Dch)
Means for detecting the call use status of each information channel (Bch) of the connected line by monitoring the incoming call and outgoing call command and the call use of each information channel (Bch) of the connected line By providing the display device means for notifying the operator of the situation, the call use situation of the line to which the terminal is connected is always output to the display device.

[0009]

According to the present invention, since the usage status of the line can be seen at a glance before the call operation is performed, unnecessary call operation is not performed and the operability is remarkably improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the telephone of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram of a telephone according to the present invention. In FIG. 1, 1 is a communication line, 2 is a communication interface section, 3 is a voice processing section, 4 is a voice output section, and 5 is a voice output section.
Is a receiving unit, 6 is a voice input unit, 7 is a transmitting unit, 8 is a line status detecting unit, 9 is a call control unit, 10 is a system control unit, and 11 is an operation unit.

In FIG. 1, the telephone is connected to the communication line (2B + D) 1 via the communication interface unit 2, and the communication interface unit 2 has two information channels (Bch) and one control signal. Channel (Dch) demultiplexing is performed.

That is, the voice information is transmitted from the voice processing unit 3.
The call control information is input / output to / from the communication interface unit 2 from the call control unit 9 and transmitted through the communication line 1.

Next, the operating state of the telephone of FIG. 1 will be described.

First, the flow of voice information will be described. During communication, the voice of the operator is converted into an analog voice signal by the transmitter 7, adjusted to an appropriate level by the voice input unit 6, and voice processed. It is input to the unit 3, processed by A / D conversion, etc., to form a digital voice information signal, supplied to the communication interface unit 2 as an information channel signal and multiplexed, and is transmitted to the other terminal via the communication line 1. Sent.

On the contrary, the voice signal transmitted from the partner terminal is input from the communication line 1 and the communication interface unit 2
A digital audio signal is separated from the signal of the information channel and extracted, an analog audio signal is formed by D / A conversion in the audio processing unit 3, and an appropriate audio output unit 4 is formed. It is adjusted to the level and supplied to the operator by the earpiece 5.

Next, the operation of making and receiving a call will be described. At the time of making a call, a dial number or the like is input to the system control unit 10 by the operation unit 14 and set in the call control unit 9 together with a type such as call origination / reception / transfer and communication. The interface section 2 multiplexes the control channel and outputs it to the communication line 1. Also,
When an incoming call arrives, the control information from the communication line 1 is input from the communication interface unit 2 to the call control unit 9 and notified to the system control unit 10.

Reference numeral 9 is a call control unit for performing processing such as outgoing / incoming processing for line connection, line disconnection, and transfer using a control signal channel, and is controlled by the system control unit 10. Reference numeral 11 denotes an operation unit for inputting a dial number or the like when making a call, and a line usage status display device described later is provided in the operation unit 11. Here, the line use status display device may be provided other than the operation unit.

Next, the function of detecting the line use status of the telephone of the present invention will be described with reference to FIGS.

The function of detecting the line usage status of the telephone of the present invention is the line usage status detecting unit 8 of FIG. 1, which is connected to the communication line 1 in parallel with the communication interface unit 2 and constantly analyzes incoming and outgoing call information of the line. Then, the usage status of the information channel is detected, and the line usage status detection result is input to the system control unit 10 and displayed on the LED in the operation unit 11.

FIG. 2 is a detailed block diagram of the line usage status detecting unit, which is a detailed block diagram between the communication line 1 and the communication interface unit 2 in FIG.

In FIG. 2, the communication line 1 is a network terminating device 2
00, and a bus line 201 is formed between the terminals. Up to eight terminals can be connected to the bus wiring 201, but each terminal has communication connectors 202 to 204.
Will be connected at. Here, the telephone of this system is a terminal 1
And The communication connector 202 has four signal lines. The inner two lines are transmission lines and are separated by a transmission transformer 205, and the remaining two lines are reception lines and signals are separated by a reception transformer 206. The communication interface unit 2 in FIG. 1 includes a communication connector 202, a transmission transformer 205,
It is composed of a reception transformer 206, a transmission interface 207, a reception interface 208, and a communication control unit 209, and the communication control unit 209 transmits and receives data.

In the line usage status detector 8, the transmission interface 207 and the reception interface 208 are shared with the communication interface unit 2, the transmission data and the reception data output from the communication interface unit 2 are input, and each line is monitored and analyzed. . For example, by monitoring the transmission line, it can be detected that another terminal has output a call command to the network, and by monitoring the reception line, the network can send a call command to that terminal. Can be detected, and therefore, the usage status of both B1 / B2 lines can be detected.

FIG. 3 shows an example of the operating portion of the telephone of the present invention, where 300 is a dial switch for inputting a dial number, 302 is an on-hook switch for performing on-hook dialing, and 301 is an on-hook state. Is an on-hook LED for notifying the user, 303 is a calling switch for issuing a calling instruction, and 304 and 305 are LEDs for displaying a result of line usage status detection. The ISDN line basic interface has two information channels,
When communicating with another terminal, B1-
The LED 304 and the B2-LED 305 are turned on.

A series of these operations will be described with reference to the flowchart of FIG.

First, in step 400, it is checked whether or not the line is used for the B1 channel of the two information channels. If the B1 line is being used, the LED 304 is turned on in step 402 and the B1 line is on standby (non-operation). In the case of (in use), the LED 304 is turned off in step 401. Next, in step 403, it is checked whether or not the line is used for the B2 channel. If the B2 line is in use, the LED 305 is turned on in step 405, and if the B2 line is in standby (not in use), step 40
At step 4, the LED 305 is turned off.

Thus, the line usage status of the line can be displayed on the line LED of the operation unit.

[0028]

Since the telephone of the present invention has the above-mentioned structure, it can easily have the line usage status detecting function, and the usage status of the line can be known at a glance before the call operation is performed. Since there is no need to make a call operation, there is an effect that operability is significantly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a telephone of the present invention.

FIG. 2 is a detailed block diagram of a line usage status detection unit of the telephone of the present invention.

FIG. 3 is an explanatory diagram of an operation unit of the telephone of the present invention.

FIG. 4 is a flowchart showing the operation of the telephone of the present invention.

FIG. 5 is a block diagram showing an embodiment of a conventional telephone.

[Explanation of symbols]

 1 communication line 2 communication interface unit 3 voice processing unit 4 voice output unit 5 voice receiving unit 6 voice input unit 7 voice transmitting unit 8 line status detection unit 9 call control unit 10 system control unit 11 operation unit 304 display line usage status detection result LED 305 LED that displays the result of line usage detection

Claims (1)

[Claims] 1. A telephone which is connected to a digital line having a plurality of information channels and a control signal channel (2B + D), and which has at least a means for inputting / outputting a signal of a transmission / reception line necessary for communication. Detects the call use status of each information channel (Bch) of the connected line by monitoring the control channel (Dch) of each transmission / reception line and the means for inputting the signal of the transmission line Means and display means for notifying the operator of the call use status of each information channel (Bch) of the connected line, so that the call use status of the line to which the terminal is connected is always maintained. A telephone that outputs to a display device.