JPS59134971A - Sending out system of howler tone to digital subscriber terminal - Google Patents

Abstract

PURPOSE:To make a howler tone audible without providing an exclusive apparatus in a switchboard for sending out a howler tone by providing a tone generator in a subscriber terminal equipment, and transmitting and receiving a signal obtained by encoding a sending instruction and a suspending instruction. CONSTITUTION:When a howler tone is sent to a digital subscriber terminal 17, a subscriber circuit 22 which receives an instruction for sending out a howler tone through a network 24 and a subscriber circuit control device 23 from a central processing unit 25 encodes a control signal by an encoding circuit 21, and sends out a signal to the digital subscriber terminal 17 through an interface part 18. The digital subscriber terminal 17 which has received a control signal knows that said control signal signifies such a fact that the howler tone has been sent out, in a code signal analyzing part 13, generates a howler tone by a tone generator 12, and it is converted to an audible sound by a loudspeaker 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a howler sound transmission system for digital subscriber terminals.

Howler sound 2 for a conventional analog subscriber terminal is a switching contact for switching to a Howler trunk, 3 is a subscriber circuit, 4 is a link for supplying howler sound to the subscriber, 5 is a howler sound generation, Howler a howler trunk that detects on-hook when transmitting sound; 6 is a network;
7 is a central processing unit.

When attempting to supply howler sound to the analog subscriber terminal device, the central processing unit 7 instructs the subscriber circuit 3 to close the switching relay, closes the switching contact 2, and also supplies the howler sound to the howler trunk 5. By giving the generation instruction, the howler sound reaches the analog subscriber terminal device 1 through the syringe 4 and the switching contact 2. How 2 - On-hook detection during sound transmission is performed by the howler trunk 5, and the central processing unit 7
The howler sound sending operation is completed by notifying the user.

In this method, instructions must be given to the subscriber circuit 3 and the howler trunk 5 before the howler sound is transmitted, and the number of subscribers to whom the howler sound can be transmitted depends on the number of howler trunks installed. There are drawbacks.

It is an object of the present invention to transmit a howler sound by installing a tone generator in a subscriber terminal and having the tone generator transmit and receive a signal encoded with a transmission command and a stop command. This eliminates the drawbacks of

According to the present invention, in a digital subscriber line in which voice and data signals are transmitted and received on the subscriber line in a digital format,
A control signal analysis circuit, a tone generator,
and a sound generator, and when transmitting howler sound, the subscriber circuit control device converts howler sound transmission commands and stop commands into signals predetermined as subscriber line control signals according to instructions from the central processing unit. A howler sound transmission method for a digital subscriber terminal is obtained, which is characterized in that the subscriber terminal equipment internally generates the howler sound according to this command and causes the subscriber to hear it through a sound generator.

FIG. 2 is a block diagram showing one embodiment of the present invention.
1 is a speaker, 12 is a tone generator 13, 20 is an analyzer for control signals that are coded and sent and received, 14 is a hook switch, 15.21 is a coding circuit that codes control signals, and 16.18 is a digital subscriber line interface section, 17 digital subscriber terminal devices, 22 a subscriber circuit, 23 a subscriber circuit control device, 24 a network,
25 is a central processing unit.

When transmitting a howler sound to the digital subscriber terminal 17, the subscriber circuit 22 receives a howler sound transmission command from the central processing unit 25 via the network 24 and the subscriber circuit control device 23, and the coding circuit 21 The control signal is encoded at the interface section 18, and the signal is sent to the digital subscriber terminal 17 through the interface section 18. The digital subscriber terminal 17 that received the control signal uses the code signal analysis section 13
In step 1, it is learned that the control signal means to send out a howler sound, and the tone generator 18 generates a howler sound, which is converted into an audible sound by the speaker 11. When a subscriber is on-hook, a signal generated by the hook switch 14 is encoded by the coding circuit 15 and sent to the exchange as an on-hook signal, decoded by the coding signal analysis section 20, and sent to the subscriber line control signal vortex 3 and the network. 24
The central processing unit 25 is notified via .

As explained above, the present invention installs a tone generator in the subscriber terminal device and transmits and receives signals coded with a sending command and a stop command, thereby installing a dedicated device for howler sending in the exchange. You can hear the howler sound without doing anything.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an example of a howler sound transmission system for a conventional analog subscriber terminal device, and FIG. 1 shows a block configuration diagram of an embodiment. 1...Subscriber terminal device, 2...Switching contact, 3゜22...Subscriber circuit, 4...
Howler sound supply link, 5...Howler trunk, 6.24...Network, 7...
・Central processing unit, 11...Speaker, 12...
...Tone generator, 13.20...Code analysis section, 14...Hook switch, 15,21
. . . code creation section, 16, 18 . . . subscriber line interface section, 17 . . . digital subscriber terminal device, 23 . . . subscriber circuit control device , 25...Central 6- Procedural amendment (self 0 Commissioner of the Patent Office 1, case description 1981 Patent Application No. 9595
No. 3. Relationship with the case of the person making the amendment Applicant: 5-33-1 Shiba, Minato-ku, Tokyo (423) NEC Corporation Representative: Tadahiro Sekimoto, 4; Agent: 5; Column 6 of ``Scope of Claims'' and ``Detailed Description of the Invention'', Contents of Amendment (1) The ``Scope of Claims'' of the specification will be amended as a separate sheet. (2) On page 3, lines 13 to 15 of the same book, ``According to the present invention...in digital subscriber lines'' was replaced with ``According to the present invention, voice, data, and subscriber For digital subscriber lines where line control signals are sent and received in digital format, the correction is made as follows. Attached Patent Claims Participant In a digital subscriber line that transmits and receives voice data and subscriber line control signals in digital format, a control signal analysis circuit, a tone generator, and a sound generator are installed in the subscriber terminal device. However, when transmitting howler sound, the subscriber circuit control device converts the howler sound transmission command and stop command into a signal predetermined as a subscriber line control signal and sends it to the subscriber terminal according to instructions from the central processing unit. A howler sound transmission method for a digital subscriber terminal, characterized in that the subscriber terminal device internally generates a howler sound according to this command and causes the subscriber to hear it through a sound generator. 718-

Claims (1)

[Claims] In a digital subscriber line where voice and data signals are transmitted and received in digital format on the subscriber line, a control signal analysis circuit, a tone generator, and an oscillator are installed in the subscriber terminal equipment. The circuit control device converts the howler sound transmission command and stop command into a predetermined subscriber line control signal and sends it to the subscriber terminal according to instructions from the central processing unit, and the subscriber terminal device follows this command. A method for transmitting howler sounds to digital subscriber terminals, characterized in that howler sounds generated internally are made to be heard by subscribers through a sound generator.