CN201332429Y - System fusing GSM access with analog switch - Google Patents

Abstract

The utility model discloses a system fusing a GSM access with an analog switch, wherein, the GSM access includes a GSM wireless module, a conversion module connected with the GSM wireless module, and a dual-tone multifrequency decode module connected with the GSM wireless module as well as the conversion module; the analog switch includes a switching network, a micro control module connected with the switching network, and a subscriber line interface module connected with the switching network as well as the micro control module; the subscriber line interface module is provided with at least an interface that can be connected with a subscriber's extension; a direct audio signal connection is established between the conversion module and the switching network; and a direct control signal connection is established between the micro control module and the GSM wireless module. The utility model has the advantages of reducing the cost of an MCU as well as the partial cost of SLIC and PLI circuits.

Description

A kind of GSM inserts the emerging system with the simulation exchange

Affiliated technical field

The utility model relates to a kind of GSM and inserts the emerging system that exchanges with simulation.

Background technology

Please refer to Fig. 1, it has illustrated existing GSM and has inserted the emerging system that exchanges with simulation.

This GSM inserts, it comprises a gsm wireless module, one subscriber line interface module (slic circuit, Subscriber Line Interface Circuit), one double-tone multifrequency decoder module (DTMF decoding chip, Dual Tone Multi Frequency) and a microcontroller module (MCU, Micro ControllerUnit), this gsm wireless module is connected with the subscriber line interface module and is connected to set up mutual audio signal, this subscriber line interface module is connected with the dual-tone multifrequency decoder module and is connected to set up dtmf signal, this dual-tone multifrequency decoder module is connected with the microcontroller module, and this gsm wireless module is connected with the microcontroller module.

This simulates exchange, it comprises a PLI circuit (Phone Line Interface, external O mouth), a switching network, a telephone line interface module (slic circuit, Subscriber Line InterfaceCircuit) and a microcontroller module (MCU, Micro Controller Unit).This PLI circuit, it provides the interface with the PSTN outside line, and in order to realize: high pressure is isolated (high-voltage isolationbarrier); Hook switch (switchhook); Mix (2-wire to 4-wire hybrid); Ring detects (ring detection); On-hook detects (on-hook signal detection).This microcontroller module connects PLI circuit, switching network, telephone line interface module to set up the control signal connection, this PLI circuit is connected with switching network and is connected to set up mutual audio signal, this switching network is connected with the telephone line interface module and is connected to set up mutual audio signal, and this telephone line interface module has at least one interface that can connect subscriber's extension station.

The subscriber line interface module that this GSM inserts is connected with the PLI circuit of simulation exchange, with the fusion of realization GSM access with the simulation exchange.Because the GSM access is to realize with the PLI circuit of simulation exchange by the subscriber line interface module that GSM inserts with the fusion of simulation exchange, so it has following deficiency: 1, this GSM inserts, simulates exchange and need be provided with MCU, the cost height; 2, need be provided with two slic circuits and a PLI circuit, cost height.

The utility model content

The utility model provides a kind of GSM to insert the emerging system that exchanges with simulation, and it has overcome the emerging system existing cost high deficiency of background technology GSM access with the simulation exchange.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of GSM inserts the emerging system with the simulation exchange, it is characterized in that:

This GSM inserts, and it comprises that the modular converter and of a gsm wireless module, a connection gsm wireless module connects the dual-tone multifrequency decoder module of gsm wireless module, connection modular converter;

This simulates exchange, and it comprises that the microcontroller module and of a switching network, a connection switching network connects the subscriber line interface module of switching network, connection microcontroller module, and this subscriber line interface module has at least one interface that can connect subscriber's extension station;

Setting up direct audio signal between this modular converter and the switching network connects;

Setting up direct control signal between this microcontroller module and the gsm wireless module connects.

In one preferred embodiment, this modular converter has an audio interface, and this switching network connects audio interface.

The technical program is compared with background technology: be connected owing to set up direct audio signal between this modular converter and the switching network, setting up direct control signal between this microcontroller module and the gsm wireless module connects, therefore it has overcome the existing deficiency of background technology, and has following advantage: 1, saved a MCU, reduced cost; 2, saved the partly cost of circuit of SLIC and PLI.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the schematic diagram that the GSM of prior art inserts the emerging system that exchanges with simulation.

Fig. 2 is the schematic diagram that the GSM of a preferred embodiment of the present utility model inserts the emerging system that exchanges with simulation.

Embodiment

Please refer to Fig. 2, a kind of GSM inserts the emerging system with the simulation exchange.

This GSM inserts, and it comprises a gsm wireless module, a modular converter (2-4 line change-over circuit) and a double-tone multifrequency decoder module (DTMF decoding chip, Dual Tone Multi Frequency).This gsm wireless module, it realizes that in order to carry out the mutual of voice, signaling with the mobile base station wireless speech relay function and calling transfer are provided with function.This DTMF decoding chip, it is in order to use touch-tone signal transmission 0-9/*/#/A/B/C/D information.

This gsm wireless module is connected with modular converter and is connected to set up mutual audio signal, and this modular converter is connected with the dual-tone multifrequency decoder module and is connected to set up dtmf signal, and this dual-tone multifrequency decoder module is connected with the gsm wireless module.This modular converter has an audio interface.

This simulates exchange, and it comprises a switching network, a telephone line interface module (slic circuit, Subscriber Line Interface Circuit) and a microcontroller module (MCU, MicroController Unit).This slic circuit, it provides the interface of common simulation phone, in order to realize: feed (Battery feed): to the central battery telephone apparatus DC feedback; Overvoltage protection (OvervoltageProtection): prevent voltge surge on the subscribers feeder or overvoltage and damage switch; Ring (Ringing): present ringing-current to called subscriber's phone; Mix (Hybrid): carry out the 2/4 line conversion of subscribers feeder.This DTMF decoding chip, it is in order to use touch-tone signal transmission 0-9/*/#/A/B/C/D information.This MCU is a microcontroller, is the core of system, and it is in order to communication and the control of realization with each intermodule of system.

This microcontroller module connects switching network, the telephone line interface module connects to set up control signal, and this switching network is connected with the telephone line interface module and is connected to set up mutual audio signal.This telephone line interface module has at least one interface that can connect subscriber's extension station, and this interface connects subscriber's extension station.

Setting up direct audio signal between the audio interface of this modular converter and the switching network connects.Since directly mutual in the audio interface that GSM on the voice inserts with the switching network of simulating in the exchange, the partly cost of circuit of SLIC and PLI therefore can be saved.

Setting up direct control signal between this microcontroller module and the gsm wireless module connects.Since the MCU in the simulation exchange directly with the gsm wireless module carry out dislodging machine, incoming call, talking state signal alternately, therefore can realize the dislodging machine testing in the gsm wireless inside modules, outgoing call detects, display signals output and talking state output are exported, come to bell signal, can save the cost that uses MCU (former gsm wireless need use a MCU in inserting).

The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented with this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims (2)

1. a GSM inserts the emerging system that exchanges with simulation, it is characterized in that:

This GSM inserts, and it comprises that the modular converter and of a gsm wireless module, a connection gsm wireless module connects the dual-tone multifrequency decoder module of gsm wireless module, connection modular converter;

This simulates exchange, and it comprises that the microcontroller module and of a switching network, a connection switching network connects the subscriber line interface module of switching network, connection microcontroller module, and this subscriber line interface module has at least one interface that can connect subscriber's extension station;

Setting up direct audio signal between this modular converter and the switching network connects;

Setting up direct control signal between this microcontroller module and the gsm wireless module connects.

2. a kind of GSM according to claim 1 inserts the emerging system with the simulation exchange, and it is characterized in that: this modular converter has an audio interface, and this switching network connects audio interface.

Images