JPS63196137A - Communication equipment - Google Patents

Abstract

PURPOSE:To allow the operator to easily recognize the line state by using a discrimination means so as to discriminate the information of a communication line and outputting the result of discrimination in voice by a voice output means. CONSTITUTION:In case of a call, when the user hooks off a handset 1, a hook switch 2 is turned ON and it is informed to a control section 4 via an I/O port 3. The control section 4 enters the preparation operation for the call and informs the call request command through a channel D and a reception line (a) as a D-channel transmission signal. The control section 4 informs the information by a command to a voice synthesis circuit 5 and turns an analog switch 6 to a voice synthesis circuit 5. Moreover, if a connection device other than a telephone set uses the line and no idle channel B exists, the voice synthesis circuit 5 generates a voice message and energizes a speaker representing that the other connection device uses the line.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a communication device.

[Conventional example]

Conventionally, for example, in a system in which communication is performed by connecting more communication terminals than the number of communication channels to a communication line with multiple communication channels (in an ISDN network, up to 8 terminals can be connected to a line with 3 channels), there are cases where channels are not available. The drawback is that it is difficult for users to use the system, as it is difficult to know whether it is working until the actual communication operation is performed.

[Means and effects for solving the conventional drawbacks] According to the present invention, the information on the communication line is discriminated by the discriminating means, and the discrimination result is outputted as voice by the voice outputting means, so that the operator can easily check the line status. It is made so that it can be known.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

In the following examples, ISDN (Integrate
d5servicesDigitalNetwo
rk) network will be explained as an example.

FIG. 2 is a diagram showing an example of the system configuration of an I5DN network.

In FIG. 2, reference numeral 202 is an exchange for the 15DN network. Further, 201 is a line control device (NT), which performs data communication with the exchange 202.

203-206 are terminals connected to NT2O1.

The 15DN network has two B channels as data channels and one D channel as a control channel.
An address is set for 2O1, and each terminal 203~
206 each has a subaddress set therein.

When receiving data, first, in response to the address information specified by the transmission request side, the exchange 202 sends the NT2O1
A call is made using the D channel. Then, the next time the other party specifies an address, the NT
2O1 calls the terminal with the specified subaddress on the condition that it is not in use.

If no subaddress is specified by the other party, the NT2O1 calls all unused terminals and connects the free channel to the terminal that responds first.

Further, when transmitting data, when the terminal specifies the address of the communication partner using the D channel, the NT2O1 uses the D channel to send address information to the network side to call the other party if there is an empty channel.

The terminals that can be connected to the ISDN network include various communication terminals such as digital telephones, facsimile machines, and telex machines.

Each terminal of the rsDN network described above is provided with a monitoring function having the configuration shown in FIG. 1 below.

FIG. 1 is a diagram showing the configuration of a telephone having a line monitoring function.

For example, when making a call, when the user picks up the handset 1, the hook switch 2 is turned on, and the control unit 4 is notified via the I10 port 3.

The control section 4 now enters into a preparatory operation for making a call, and converts the call request command into a D channel transmission signal and inputs it to the frame assembly circuit 10.

10 assembles the signal into a 28+D basic access signal and passes it through the interface circuit 11 to the DCE 20 in FIG.
1. 201 checks the line usage status of other connected devices connected under the DEC and, if there is no problem, notifies the DEC via the receiving line (2) using the D channel. The control section 4 notifies the speech synthesis circuit 5 of this information in the form of a command, and also connects the analog switch 6 to the 5 side via the 3.

5 generates a first beep and sounds the speaker 8 via the adder circuit 7. The first dial tone will be a continuous tone of 400 Hz in order to eliminate the sense of incompatibility with conventional analog telephones in Japan.

On the other hand, as shown in Figure 2, if a connected device other than the telephone used in this operation explanation is using the line and there is no free space on the B channel, the D(l Furthermore, in this case, the voice synthesis circuit 5
generates a voice message indicating that another connected device is using the line, and sounds the speaker 8.

The user hears the first dial tone and knows that the telephone has entered the preparation operation for making a call, and then inputs the number of the other party using the dial key 9.

The input dial number reaches the control unit 4 via the I10 port 3.

4 uses this number as the D channel transmission signal to 10.11
It is sent to the DCE 201 via the transmission line ■.

201 sends the dialed number obtained in this way to the exchange 20.
2, so it will soon be connected to the other party's phone. During this time, the control unit 4 issues a command to the speech synthesis circuit 5,
A speaker 8 is sounded with a pseudo call signal to make the user wait.

In addition, if the dialed number of the above-mentioned party is incorrect,
Even if the other party's line is blocked by a connected device other than a telephone, this fact is notified to the control unit 4 by the DCE 201 in FIG. You can encourage them to go back.

If the other party picks up the phone, the call becomes possible. The audio signal inputted from the microphone 13 of the handset 1 is inputted to the encoding circuit 17 of the PCM codec 15 and sent to the PC.
After being M-encoded, it becomes a B channel transmission signal and is input to the frame assembly circuit 10. 10 converts the B channel signal into a basic access unit of 28+D and sends it to the DCH via the interface circuit 11. Here, the sidetone circuit 14 and the addition circuit 7 are used to create a natural feeling during a call, and return part of the audio signal emitted by the user to the speaker 8 to generate sidetone.

On the other hand, the other party's voice is obtained by the frame decomposition circuit 12 as a B channel reception signal.

This signal is a PCM code, and is converted into an analog audio signal by the decoding circuit 16 of the PCM codec 15. During a call, the analog switch 6 is switched to the side 15 according to an instruction from the control section 4, so that the decoded audio signal is transmitted to the speaker 8 through the channel 7.

The example up to now has been the case of an outgoing call, but the case of an incoming call will be explained below.

When there is an incoming call, the information is provided by the DCE 201 over the D channel. This is the receiving line ①, the interface circuit 11. The control unit 4 is notified via the frame decomposition circuit 12. 4 determines whether the incoming call is to a telephone set, and if so, rings the bell 6 via the I10 circuit 3.

On the other hand, if the call is received from someone other than the telephone, the telephone will not respond. When the user picks up the handset 1 in response to the bell 6, the hook switch 2 is turned on and the I10 circuit 3 is turned on.
The control unit 4 is notified through the process. The control unit 4 sends a message to the frame assembly circuit 10 on the D channel transmission signal indicating that the telephone has responded and that the telephone is going into a talking state.

This information is notified to the DCE 201 via 11. At this time, the control unit 4 switches the analog switch 6 to the PCM codec 15 side via the I10 circuit 3, and completes the call preparation.

The following conditions during a call are the same as when making a call.

In the embodiment described above, the first calling signal and the calling signal were generated by the voice synthesis circuit, but it is of course possible to use these signals as voice messages.

As explained above, according to this embodiment, various information (for example, line status, etc.) obtained from the DCE through the D channel and the status of the telephone can be provided to the user in the form of voice messages, which are very easy to understand. This makes it possible to dramatically improve the operability of the telephone.

Although the above-mentioned embodiment has been explained using ISDN as an example, the present invention is not limited to ISDN, but can be applied to all communication devices connected to ordinary public lines (telephone lines and digital lines). .

〔effect〕

As explained above, according to the present invention, the line status can be easily known and the operability of the device can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of an ISDN system.

Claims (1)

[Scope of Claims] A communication device characterized by having a discriminating means for discriminating information on a communication line, and an audio output means for outputting a discrimination result by the discriminating means as audio data.