CN206850868U - Voice gateways terminal escaping exit automatic switch-over circuit - Google Patents

Abstract

The utility model discloses a kind of voice gateways terminal escaping exit automatic switch-over circuit, including telephone interface PHONE, outer line interface FXO and the switching circuit for being connected to telephone interface PHONE and outer line interface FXO, the switching circuit includes relay K1 and relay K1 drive circuits, its repeat circuit K1 configures two groups of transfer contacts, the public contact of two groups of transfer contacts connects telephone interface PHONE electrode line tip respectively, negative line ring, the normally closed interlock corresponding with the public contact of two groups of transfer contacts connects outer line interface FXO electrode line tip respectively, negative line ring, the normally open contact of two groups of transfer contacts is connected to the SLIC chips of voice gateways terminal.The utility model utilizes the function of relay power adhesive, realizes the selection of the different routes of telephony interface, makes voice gateways terminal device in the case of energization, IP phone function is realized using broadband network, when the device is powered off, telephone set, which automatically switches, is connected to outside line, realizes normal telephone calls function.

Description

Voice gateways terminal escaping exit automatic switch-over circuit

Technical field

The utility model belongs to voice communication technology field, and in particular to a kind of voice gateways terminal escaping exit automatically switches Circuit.

Background technology

At present, many users have the telephone voice service of telecommunications, use a pair of telephone lines.There is broadband network again simultaneously Service, the online modem of operator's offer, i.e. our usually said online cats are installed.Advanced broadband network connects Connect and speech interface is all integrated with equipment, abroad using commonplace.The speech interface can realize IP electricity using common phone Function is talked about, common phone does not have to be connected to again on the circuit of voice service operator, and the corresponding interface for being directly connected to the equipment can VOIP functions are realized, save the expense of user.When integrated speech interface broadband network connect device powers down when, telephone set without Method realizes IP call functions by broadband network, and the telephone interface of the kind equipment can not be directly switch to voice service operator External telephone wire, it is necessary to pull up telephone wire be connected to indoor telephone line could realize ordinary telephone set function realize lead to outside Words.This mode wastes time and energy, and can not realize automatic switchover, user is brought inconvenience.Plug manually is needed to realize, to use Family brings inconvenience.

Utility model content

The utility model technical issues that need to address, which are to provide one kind, can automatically switch IP phone and common telephony functions, The voice gateways terminal escaping exit automatic switch-over circuit of manual switching is not needed, makes voice gateways terminal device in energization situation Under, IP phone function is realized using broadband network, when the device is powered off, telephone set, which automatically switches, is connected to outside line, realizes common Telephone relation function.

To solve the above problems, technical solution adopted in the utility model is：

A kind of voice gateways terminal escaping exit automatic switch-over circuit, including telephone interface PHONE, outer line interface FXO with And be connected to telephone interface PHONE and outer line interface FXO switching circuit, the switching circuit include relay K1 and after Electrical equipment K1 drive circuits, its repeat circuit K1 configure two groups of transfer contacts, and the public contact of two groups of transfer contacts connects electricity respectively Phone interface PHONE electrode line tip, negative line ring, the normally closed interlock corresponding with the public contact of two groups of transfer contacts Outer line interface FXO electrode line tip, negative line ring is connected respectively, and the normally open contact of two groups of transfer contacts is connected to voice network The SLIC chips of terminal are closed, the SLIC chips realize the digital-to-analogue conversion of voice signal and signal is sent into cpu chip SOC and realize The IPization of voice signal, so as to realize IP phone function, the relay K1 electricity in voice gateways terminal is normal start when, after The driving relay K1 action of electrical equipment K1 drive circuits, telephone interface PHONE connect with SLIC chips, during power-off, relay K1 Drive circuit does not work, and relay K1 is failure to actuate, and telephone interface PHONE connects with outer line interface FXO.

Further, the relay K1 drive circuits include cpu chip SOC, triode Q1, resistance R1, electric capacity C1, C2, diode D1, wherein, base stage of the cpu chip SOC GPIO pins through resistance R1 connecting triodes Q1, triode Q1's Grounded emitter, one end of triode Q1 collector connection relay K1 coils, while the colelctor electrode are grounded through electric capacity C2, after Another termination power VCC of electrical equipment K1 coils, power supply VCC are grounded through electric capacity C1, and diode is attempted by the two of relay K1 coils End, and the negative pole of diode is connected to coil connection power supply VCC one end, electricity is normal in voice gateways terminal when starting, CPU cores Piece SOC GPIO pins export a high level, the Q1 conductings of driving triode, and relay K1 coils obtain electric adhesive, and telephone set connects Mouth PHONE connects with SLIC chips.

Preferably, the SLIC chips using microsemi series chip, the family chip have CPU and phone it Between signal conversion processes, bell signal processing, analog voice signal A/D, D/A translation function.

Preferably, the cpu chip SOC is the chip of integrated VOIP functions, have ethernet signal processing, transmission and VOIP functions.

It is using beneficial effect caused by above-mentioned technical proposal：

The utility model utilizes the function of relay power adhesive, realizes the selection of the different routes of telephony interface, makes voice Gateway terminal equipment realizes IP phone function in the case of energization, using broadband network, and when the device is powered off, telephone set is cut automatically Change and be connected to outside line, realize normal telephone calls function, realize automatic between common charged call and free IP phone Switching.Circuit structure is simple, and cost is low, greatly facilitates user's use.

Brief description of the drawings

Fig. 1 the utility model circuit theory diagrams.

Embodiment

Utility model is described in further detail below in conjunction with the accompanying drawings：

As shown in figure 1, the utility model includes telephone interface PHONE, outer line interface FXO and is connected to telephone set and connects Mouth PHONE and outer line interface FXO switching circuit, the switching circuit include relay K1 and relay K1 drive circuits, Its repeat circuit K1 configures two groups of transfer contacts, and the public contact of two groups of transfer contacts connects telephone interface PHONE's respectively Electrode line tip, negative line ring, the normally closed interlock corresponding with the public contact of two groups of transfer contacts connect outer line interface respectively FXO electrode line tip, negative line ring, the normally open contact of two groups of transfer contacts are connected to the SLIC chips of voice gateways terminal, The SLIC chips realize the digital-to-analogue conversion of voice signal and signal are sent into the IPization that cpu chip SOC realizes voice signal, from And IP phone function is realized, in the normal startup of electricity in voice gateways terminal, relay K1 drive circuits drive the relay K1 Motor type relay K1 is acted, and telephone interface PHONE connects with SLIC chips, and during power-off, relay K1 drive circuits do not work, after Electrical equipment K1 is failure to actuate, and telephone interface PHONE connects with outer line interface FXO.The relay K1 drive circuits include cpu chip SOC, triode Q1, resistance R1, electric capacity C1, C2, diode D1, wherein, a cpu chip SOC GPIO pins connect through resistance R1 Connect triode Q1 base stage, triode Q1 grounded emitter, one end of triode Q1 collector connection relay K1 coils, The colelctor electrode is grounded through electric capacity C2 simultaneously, and another termination power VCC of relay K1 coils, power supply VCC are grounded through electric capacity C1, and two Pole pipe is attempted by the both ends of relay K1 coils, and the negative pole of diode is connected to coil connection power supply VCC one end, voice network When closing electric normal startup in terminal, cpu chip SOC GPIO pins export a high level, and driving triode Q1 is turned on, relay Device K1 coils obtain electric adhesive, and telephone interface PHONE connects with SLIC chips.

Wherein, SLIC chips typically use microsemi family chip, such as LE9641, LE9642, its major function It is the conversion process for realizing signal between CPU and phone, includes the processing of bell signal, A/D, D/A of analog voice signal turns Change；Cpu chip using the band VOIP functions of company such as BROADCOM, MTK, RTL integrated chip, as BCM68138, RTL8696, MTK7513 etc., major function are to realize processing transmission and VOIP functions of ethernet signal etc..

The utility model utilizes the function of relay power adhesive, realizes the selection of the different routes of telephony interface.Work as equipment During normal power-up, telephone set is connected to the SLIC chips of equipment by telephone interface PHONE, and SLIC chips realize voice signal Digital-to-analogue conversion and signal is sent to the IPization that cpu chip SOC realizes voice signal, so as to realize IP phone function；Work as equipment During power-off, telephone set is connected by telephone interface PHONE with outer line interface FXO, realizes ordinary telephone set call function, outside line Interface FXO is connected to the PBX local sides of operator.

Operation principle

As shown in figure 1, when equipment is not upper electric, relay K1 contact 4 and 3 turns on, 9 and 10 conductings, telephone interface PHONE and external interface FXO realizes connection conducting, and telephone set realizes normal telephone calls function；When device power normally starts Afterwards, cpu chip SOC GPIO mouths export a high level, provide base current to triode Q1 by current-limiting resistance, make three poles Pipe Q1 is turned on, and so as to form DC current on the coil between 1 and 12 pin of relay, relay produces adhesive action, caused Conducting is contacted with 5 pin again after relay K1 4 pin and the separation of 3 pin, 9 pin contact conducting with 8 pin again after being separated with 10 pin, so that Obtain telephony interface PHONE to be connected with SLIC chips, realize IP phone function.Electric capacity C1, C2 are used to filter, and diode D1 is afterflow Diode, play a part of suppressing to absorb inverse electromotive force.

Claims (4)

1. A kind of 1. voice gateways terminal escaping exit automatic switch-over circuit, it is characterised in that：Including telephone interface PHONE, outside line Interface FXO and the switching circuit for being connected to telephone interface PHONE and outer line interface FXO, the switching circuit include relay Device K1 and relay K1 drive circuits, its repeat circuit K1 configure two groups of transfer contacts, the public contact of two groups of transfer contact Telephone interface PHONE electrode line tip, negative line ring is connected respectively, it is corresponding with the public contact of two groups of transfer contacts Normally closed interlock connect outer line interface FXO electrode line tip, negative line ring respectively, the normally open contact of two groups of transfer contact connects The SLIC chips of voice gateways terminal are connected to, the SLIC chips realize the digital-to-analogue conversion of voice signal and signal is sent into CPU Chip SOC realizes the IPization of voice signal, and so as to realize IP phone function, electricity is being just in voice gateways terminal by the relay K1 When often starting, relay K1 drive circuits driving relay K1 actions, telephone interface PHONE is connected with SLIC chips, powered off When, relay K1 drive circuits do not work, and relay K1 is failure to actuate, and telephone interface PHONE connects with outer line interface FXO.
2. 2. voice gateways terminal escaping exit automatic switch-over circuit according to claim 1, it is characterised in that the relay K1 drive circuits include cpu chip SOC, triode Q1, resistance R1, electric capacity C1, C2, diode D1, wherein, cpu chip SOC's Base stage of the one GPIO pins through resistance R1 connecting triodes Q1, triode Q1 grounded emitter, triode Q1 colelctor electrode connect One end of contact relay K1 coils, while the colelctor electrode is grounded through electric capacity C2, another termination power VCC of relay K1 coils, Power supply VCC is grounded through electric capacity C1, and diode is attempted by the both ends of relay K1 coils, and the negative pole of diode is connected to coil company Connect power supply VCC one end, electricity is normal in voice gateways terminal when starting, and cpu chip SOC GPIO pins export one high electricity Flat, driving triode Q1 conductings, relay K1 coils obtain electric adhesive, and telephone interface PHONE connects with SLIC chips.
3. 3. voice gateways terminal escaping exit automatic switch-over circuit according to claim 1 or 2, it is characterised in that the SLIC Chip has signal conversion processes between CPU and phone, bell signal using chip serial microsemi, the family chip Processing, analog voice signal A/D, D/A translation function.
4. 4. voice gateways terminal escaping exit automatic switch-over circuit according to claim 1 or 2, it is characterised in that the CPU Chip SOC is the chip of integrated VOIP functions, has ethernet signal processing, transmission and VOIP functions.