CN203340171U

CN203340171U - VoIP terminal of USB interface

Info

Publication number: CN203340171U
Application number: CN2013204512175U
Authority: CN
Inventors: 杨进; 骆燕胜; 徐彩霞
Original assignee: 杨进
Priority date: 2013-07-28
Filing date: 2013-07-28
Publication date: 2013-12-11
Anticipated expiration: 2023-07-28

Abstract

The utility model discloses a VoIP terminal of an USB interface. The VoIP terminal comprises a one-chip microcomputer, a matrix keyboard, a speech circuit, a telephone handle, a hook switch and a D-type power amplifier circuit. The one-chip microcomputer is used for identifying buttons on the matrix keyboard and sending USBHID keyboard scan codes to a computer through the USB interface. The matrix keyboard is used for simulating numerical keys and symbols on a telephone mainframe. Specific keys contain numbers 0-9, the Enter key, the dialing key and the delete key. The speech circuit can broadcast the pressed numbers and symbols on the matrix keyboard. The telephone handle is used for being connected with an audio output port of a computer. When the telephone handle is at a hang-off state, a voice loudspeaker function is realized. According to the utility model, hardware circuits are simple and reliable, and costs are very low. The terminal device can be used to call landline and mobile phones through various pieces of internet phone software. The application method of the terminal device is similar to that of telephones and landline, and operation is simple.

Description

A kind of VoIP terminal of USB interface

Technical field

The utility model relates to communication apparatus, particularly a kind of VoIP terminal of USB interface.

Background technology

The networking telephone adopts data compression and block exchange mode to transmit voice messaging, and occupied bandwidth only has 1/5 of black phone, and therefore very significantly price advantage is arranged, and increasing user is using IP phone.But current design circuit complexity, the production cost of producer is higher, for reducing costs many producers, does not configure display screen, also to the user, has been with inconvenience.

Summary of the invention

In order to address the above problem, the utility model provides a kind of VoIP terminal of USB interface.

The technical solution adopted in the utility model is: a kind of VoIP terminal of USB interface comprises single-chip microcomputer, matrix keyboard, sound circuit, telephone handle, inserts spring switch and D class power amplifier.Described single-chip microcomputer is used for the button of recognition matrix keyboard send USB HID keyboard scancode to computer by USB interface, described matrix keyboard is used for numerical key and symbol on the analog telephone machine host, concrete button has numeral 0 ~ 9, enter key, start dial key, delete key, described sound circuit can be reported numeral and the symbol of pressing on matrix keyboard, described telephone handle is used for being connected with the audio input port of computer, described slotting spring switch is used for the connection of switching computer voice output mouth respectively at telephone handle and D class power amplifier, described D class power amplifier is used for being connected with the computer audio delivery outlet, when telephone handle during at hook state, realize the outer playing function of voice.

Compared with prior art, the utility model has the advantage of: circuit structure is very simple, plug and play while being connected with computer, and without installation of drive software, hardware cost is very low, simultaneously with voice dial-up function, without display screen.

The accompanying drawing explanation

Fig. 1 is theory diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further illustrated.The utility model is only the description to the utility model execution mode, scope of the present utility model is not had to any restriction.

Embodiment 1.

As shown in Figure 1, a kind of VoIP terminal of USB interface, comprise single-chip microcomputer, matrix keyboard, sound circuit, telephone handle, insert spring switch and D class power amplifier.

As shown in Figure 2, a kind of VoIP terminal of USB interface, comprise 12 main chip such as U1, U2, U3, KG1, KG2, LS1, LS2, LS3, MIC, J1, J2, J3 and parts and form.Wherein U1 is D class power amplifier chips AX2012, and U2 is single-chip microcomputer SONIX2202, U3 speech chip NY3P010A, KG1 and KG2 are for inserting the spring switch, and LS1, LS2, LS3 are loudspeaker, and MIC is electret mike, J1, J2 are the male joint of monophony 2.5mm earphone, and J3 is the USB male joint.

Above-mentioned case study on implementation is preferably execution mode of the utility model; but execution mode of the present utility model is not subject to the restriction of above-mentioned case study on implementation; other any do not deviate from change, modification, combination, the simplification of doing under Spirit Essence of the present utility model and principle; all should be equivalent substitute mode, within being included in protection range of the present utility model.

Claims

1. the VoIP terminal of a USB interface, comprise single-chip microcomputer, matrix keyboard, sound circuit, telephone handle, insert spring switch and D class power amplifier.

2. the VoIP terminal of USB interface according to claim 1, it is characterized in that, comprise D class power amplifier, described D class power amplifier switches and being connected of computer audio delivery outlet by inserting the spring switch, when telephone handle during at hook state, realize the outer playing function of voice, when the telephone handle off-hook, the computer audio delivery outlet transmits voice to telephone handle.

3. the VoIP terminal of USB interface according to claim 1 is characterized in that: described single-chip microcomputer is the single-chip microcomputer SONIX2202 with the USB kernel, and its USB interface plug and play, without any drive software is installed on computers.

4. the VoIP terminal of USB interface according to claim 1 is characterized in that: described matrix keyboard has button that numeral 0 ~ 9, enter key, beginning dial key, delete key are arranged, and wherein enter key means to hang up the telephone.

5. the VoIP terminal of USB interface according to claim 1, it is characterized in that: described sound circuit acp chip is single-chip CMOS chipspeech NY3P010AS8.

6. the VoIP terminal of USB interface according to claim 1, it is characterized in that: described D class power amplifier acp chip is AX2012, voice unit can be play 0 ~ 9 numeral, on-hook, " just at during dialing " and reach " deletion " Chinese speech.