JPH03128554A - Digital telephone set - Google Patents

Abstract

PURPOSE:To hear a sound service message, which is sent from an exchange, transmitting tone or busy tone when there is no sound service message, as well by providing a discrimination control part to connect a receiver and a B channel control part by receiving a control signal from a D channel control part. CONSTITUTION:When a CALL-PROC signal is inputted from an ISDN network 9, a D channel control part 7 investigates a parameter in the signal and when it is discriminated that a sound signal is outputted from an exchange 10, a command showing such a state is sent to a discrimination control part 5. The discrimination control part 5 connects a B channel control part 6 and a CODEC 2 and the sound message like 'called party is just under calling, please wait for a moment', for example, to be sent from the exchange 10 flows to a receiver 1-2. The discrimination control part 5 simultaneously sends out the command to a display part 4 as well and according to this command, the display part 4 executes the display of [sound from exchange].

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital telephone, and particularly to a digital telephone connected to an I5DN network.

[Prior Art] Conventionally, this type of telephone did not generate dial tone, busy tone, ringback tone, etc. inside the telephone. For this reason, the exchange will tell you that there is no other party's number.
I could only hear voice service messages such as "The line is busy" on the handset.

[Problems to be Solved by the Invention] The present invention eliminates the above-mentioned drawbacks of the prior art, and its purpose is to improve the voice service messages sent from the exchange and the dial tone when there is no voice service. The purpose of the present invention is to provide a digital telephone that allows you to listen to busy tones as well.

[Means for Solving the Problems] In order to achieve the above object, the digital telephone of the present invention connects to the I5DN network, and has the following features:
A handset including a transmitter/receiver, a D channel control unit that controls the call origination/reception status, determines a signal indicating that a voice message is being output from the exchange, and outputs a control signal to that effect, and a call signal. The outline of the present invention is to include a B channel control section that processes the above-mentioned D channel control section, and a discrimination control section that connects the handset and the B channel control section by receiving a control signal from the D channel control section.

[Function] In this configuration, the D channel control section controls the call origination/termination state, and also discriminates a signal indicating that a voice message is being output from the exchange and outputs a control signal to that effect. On the other hand, the B channel control section processes the call signal.

The discrimination control section connects the receiver and the B channel control section by receiving a control signal from the D channel control section.

[Description of Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a digital telephone according to an embodiment. In the figure, 1 is a handset, and a transmitter 1
-1, including handset 1-2. 2 is a code/decoder (COD)
EC) and performs companding/expansion processing of the audio signal for the transmitter/receiver 1-1/2. For example, CCI TT Recommendation G71
It is a PCM-CODEC according to 1. Reference numeral 3 denotes an audio output control unit which outputs an audio (including sound) signal according to the command input to the receiver 1-2. 4 is a display section;
Display message information according to command input. Reference numeral 5 denotes a discrimination control section, which uses a signal from the D channel control section 7 to select the audio output control section 3, the display section 4, or the C0DEC2.
The connections between the D channel controller 6 and the D channel controller 6 are separated. Reference numeral 6 represents a B channel control unit, which processes a call signal. Reference numeral 7 denotes a D channel control section, which controls call origination/termination status, discriminates a signal indicating that a voice message is being outputted from the exchange 10, and outputs a control signal to that effect to the discrimination control section 5. 8 is a dial control section, with which the user can dial. Furthermore, 9 is an 15DN network, and 10 is an exchange.

FIG. 2 is a diagram illustrating the transmission operation and signal flow of the embodiment. First, when dialing is performed using the dial control section 8,
The D channel control unit 7 sends a 5ETUP command to the 15DN network 9 to perform a calling operation. At the same time, the D channel control section 7 sends a command to the discrimination control section 5, which causes the discrimination control section 5 to send a command to the audio output control section 3, which causes the audio output control section 3 to send a call to the receiver 1-2. Outputs a sound signal. The discrimination control section 5 also sends a command to the display section 4 at the same time, so that the display section 4 displays "Dialing".

Next, when a CALL-PROC signal is input from the 15DN network 9, the D channel control unit 7 examines the parameters in the signal, and when it determines that a voice signal is being output from the exchange 10, the determination control unit 5 Send a command to that effect. As a result, the discrimination control section 5 sends a command to stop the beep signal to the audio output control section 3, which causes the audio output control section 3 to stop outputting the beep signal. After that, the discrimination control section 5 connects the D channel control section 6 and the C0DEC.
2, and a voice message sent from the exchange 10, such as "Calling the other party. Please wait for a while", is sent to the receiver 1-2. At the same time, the discrimination control section 5 also sends a command to the display section 4, so that the display section 4 displays "Voice from the exchange."

After that, when the C0NN signal is input from the l5DN network 9,
The D channel control unit 7 sends a command to that effect to the discrimination control unit 5, and thereby the discrimination control unit 5 causes the display unit 4 to display the message “In call”. Then, the call operation begins.

[Effects of the Invention] As described above, according to the present invention, users can now listen to voice service messages sent from the exchange, as well as dial tones and busy tones when there is no voice service.
Operability has been dramatically improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a digital telephone according to an embodiment, and FIG. 2 is a diagram illustrating the calling operation and signal flow of the embodiment. In the figure, 1...handset, 1-1...telephone, 1
-2...Receiver, 2...Encoder/decoder (CODEC)
) 3... Audio output control section, 4... Display section, 5.
...Discrimination control section, 6...B channel control section, 7...
・D channel control section, 8...Dial control section, 9.
...l5DN network, 10...exchange.

Claims (1)

[Scope of Claims] In a digital telephone connected to an ISDN network, a handset including a transmitter/receiver and a call originating/terminating state are controlled, and a signal indicating that a voice message is being output from an exchange is determined. a D-channel control section that outputs a control signal indicating that the call is made; a B-channel control section that processes a call signal; and a discrimination control section that connects the handset and the B-channel control section by receiving a control signal from the D-channel control section. A digital telephone characterized by comprising: