CN2402063Y - Modem pool - Google Patents

Abstract

The utility model relates to a modem pool. The utility model comprises a main micro controller, a plurality of modems, a plurality of sub micro controllers and a serial interface; each modem corresponds to each sub micro controller, each modem is respectively connected with a corresponding sub micro controller, and each sub micro controller is connected with the main micro controller which is connected with the serial interface. The utility model is connected with a PC computer by the serial interface and can be simultaneously connected with a plurality of ordinary telephone lines, the utility model can guarantee that the computer at the data acceptance end can conduct remote transmission of two-way data, and the utility model simlifies the equipment configuration of the data acceptance end.

Description

Modem bank

The utility model relates to data communication field, particularly relates to a kind of modem bank (Modem pond).

The Modem of prior art can only use No. one telephone wire to carry out the bi-directional data teletransmission at synchronization.Computer at data receiver has only under the situation of a Modem, when a plurality of users utilize telephone wire simultaneously when the computer of data receiver carries out transfer of data, the Modem of data receiver will frequently the line is busy, cause many obstacles so just for the multi-user calling data receiver, hindered the smooth transmission of data greatly.And if give the plural Modem of computer configuration of data receiver, not only can directly cause the rising of cost but also can cause the complicated of data receiver equipment and take office space, the office space that makes this act hurriedly in a messy situation is more mixed and disorderly.

The purpose of this utility model proposes a kind of Modem pond exactly, and it can connect a plurality of ordinary telephone wirings simultaneously, guarantees that the computer of data receiver can carry out the bi-directional data teletransmission and the equipment disposition of reduced data receiving terminal simultaneously.

The purpose of this utility model is achieved in that a kind of modem bank, wherein includes: host microcontroller, a plurality of modulator-demodulator and a plural number microcontroller, serial line interface; Each modulator-demodulator is corresponding with a sub-microcontroller, and each modulator-demodulator links to each other with corresponding with it sub-microcontroller respectively, and each sub-microcontroller links to each other with host microcontroller, and host microcontroller links to each other with serial line interface.

As a kind of selectable scheme, modem bank of the present utility model, wherein some I/O mouth lines of host microcontroller link to each other with corresponding I/O mouth line in each sub-microcontroller, constitute the data/address bus of host microcontroller and each sub-microcontroller; The I/O mouth line of host microcontroller is a component group with two lines, and two lines in each group link to each other with two I/O mouth lines of each sub-microcontroller respectively, constitute the handshaking line of host microcontroller and each sub-microcontroller.

As a kind of selectable scheme, modem bank of the present utility model, wherein the P1 mouth of host microcontroller links to each other with corresponding mouthful of line of P1 mouth of each sub-microcontroller, constitutes the data/address bus of host microcontroller and each sub-microcontroller; Other I/O mouth line of host microcontroller is a component group with two lines, and two lines in each group link to each other with two I/O mouth lines of each sub-microcontroller respectively, constitute the handshaking line of host microcontroller and each sub-microcontroller.

As a kind of selectable scheme, modem bank of the present utility model, wherein said modulator-demodulator and sub-microcontroller are respectively four, i.e. first modulator-demodulator, the first sub-microcontroller, second modem, the second sub-microcontroller, the 3rd modulator-demodulator, the 3rd sub-microcontroller, the 4th modulator-demodulator, the 4th sub-microcontroller; First modulator-demodulator links to each other with the first sub-microcontroller, and second modem links to each other with the second sub-microcontroller, and the 3rd modulator-demodulator links to each other with the 3rd sub-microcontroller, and the 4th modulator-demodulator links to each other with the 4th sub-microcontroller; Corresponding with the P1 mouth of each sub-microcontroller mouthful of line of the P1 mouth of host microcontroller links to each other, and constitutes the data/address bus of host microcontroller and each sub-microcontroller; The P2.0 of host microcontroller links to each other with P2.7 with the P2.6 of the first sub-microcontroller respectively with P2.1 and constitutes the handshaking line of the host microcontroller and the first sub-microcontroller; The P2.2 of host microcontroller links to each other with P2.7 with the P2.6 of the second sub-microcontroller respectively with P2.3 and constitutes the handshaking line of the host microcontroller and the second sub-microcontroller; The P2.4 of host microcontroller links to each other with P2.7 with the P2.6 of the 3rd sub-microcontroller respectively with P2.5 and constitutes the handshaking line of host microcontroller and the 3rd sub-microcontroller; The P2.6 of host microcontroller links to each other with P2.7 with the P2.6 of the 4th sub-microcontroller respectively with P2.7 and constitutes the handshaking line of host microcontroller and the 4th sub-microcontroller.

Modem of the present utility model pond links to each other with the serial ports of PC by serial ports, finish the exchanges data of user and PC, it can connect a plurality of ordinary telephone wirings simultaneously, guarantees that the computer of data receiver can carry out the bi-directional data teletransmission and the equipment disposition of reduced data receiving terminal simultaneously.Reached purpose of design of the present utility model fully.

Below and with reference to accompanying drawing, the embodiment that develops simultaneously further describes the utility model, wherein

Fig. 1 shows the block diagram of first preferred embodiment of the present utility model;

Fig. 2 shows the circuit diagram of first preferred embodiment.

Please refer to Fig. 1 and Fig. 2, Fig. 1 shows the block diagram of first preferred embodiment of the present utility model; Fig. 2 shows the circuit diagram of first preferred embodiment.Wherein, the first sub-microcontroller is labeled as #1MPU, the second sub-microcontroller is labeled as #2MPU, the 3rd sub-microcontroller is labeled as #3MPU, the 4th sub-microcontroller is labeled as #4MPU, and first modulator-demodulator is marked as #1Modem, and second modem is marked as #2Modem, the 3rd modulator-demodulator is marked as #3Modem, and the 4th modulator-demodulator is marked as #4Modem.Main MPU links to each other with the serial ports of PC by standard RS-232 mouth, with serial mode and PC swap data.The P1 mouth of main MPU links to each other with the P1 mouth of the P1 mouth of #1MPU, #2MPU, the P1 mouth of #3MPU and corresponding mouthful of line of P1 mouth of #4MPU, constitutes the data/address bus of main MPU and #1MPU, #2MPU, #3MPU and #4MPU.The P2.0 of main MPU links to each other with P2.7 with the P2.6 of #1MPU respectively with P2.1 and constitutes the handshaking line of main MPU and #1MPU.The P2.2 of the rest may be inferred main MPU links to each other with P2.7 with the P2.6 of #2MPU respectively with P2.3 and constitutes the handshaking line of main MPU and #2MPU.The P2.4 of main MPU links to each other with P2.7 with the P2.6 of #3MPU respectively with P2.5 and constitutes the handshaking line of main MPU and #3MPU.The P2.6 of main MPU links to each other with P2.7 with the P2.6 of #4MPU respectively with P2.7 and constitutes the handshaking line of main MPU and #4MPU.

Carrying out exchanges data with main MPU and #1MPU below is example, and the process of exchanges data is described.The P2.0 that at first defines main MPU is an output line, and P2.1 is an incoming line.The P2.6 of #1MPU is an incoming line, and P2.7 is an output line.The P2.0 of initial condition master MPU, P2.1 and all export high level for P2.6, the P2.7 of defeated #1MPU.When if main MPU has data to issue #1MPU, main MPU at first makes its P2.0 output low level.After the P2.0 that #1MPU detects main MPU is output as low level, its P2.7 is put low expression #1MPU carried out the preparation that receives data.After main MPU detects the low level of #1MPU P2.7 output, the data that desire sends are exported by the P1 mouth, then its P2.0 is put high expression data and output on the data/address bus.After the P2.0 that #1MPU detects main MPU is output as high level, read the data of P1 mouth, then its P2.7 is put high expression data and read and finish.Handshaking line is finished a circulation, and main MPU has also finished the process that sends a byte to #1MPU.Repeating said process if main MPU need continue to send out data finishes up to the data transmission.If #1MPU will send data to main MPU.That its P2.7 is put is low for #1MPU so, after the P2.7 that main MPU detects #1MPU is output as low level, its P2.0 is put the main MPU of low expression carried out the preparation that receives data.After #1MPU detected the low level of P2.0 output of main MPU, the data that desire is sent were put its P2.7 high expression data then and are outputed on the data/address bus by the output of P1 mouth.After the P2.7 that main MPU detects #1MPU is output as high level, read the data of P1 mouth, then its P2.0 is put high expression data and read and finish.Handshaking line is finished a circulation, and #1MPU has also finished to main MPU

Send the process of a byte.Repeating said process if #1MPU need continue to send out data finishes up to the data transmission.

Each is from corresponding one road modem circuit of MPU.Each road modem circuit all links to each other with No. one telephone line.Under the unified management of main MPU, finished the transfer of data of No. four telephone lines to main MPU.Main MPU by serial ports with the PC swap data.Final under the unified management of main MPU, Modem has finished in the pond exchanges data of No. four telephone lines to PC.

In second preferred embodiment of the present utility model, the Modem pond includes three Modem, its body design is identical with first embodiment, and wherein employed Modem includes: telephone line interface, ring detecting circuit, microcontroller, off-hook on-hook circuit, audio frequency transformer, first amplifier, dial-up circuit, second amplifier, modulation module; Wherein, telephone line interface is electrically connected with ring detecting circuit, ring detecting circuit is electrically connected with microcontroller, telephone line interface and be electrically connected with off-hook on-hook circuit, off-hook on-hook circuit is electrically connected with audio frequency transformer, audio frequency transformer is electrically connected with second amplifier, and second amplifier is electrically connected with the modulation module, and the modulation module is electrically connected with microcontroller; Microcontroller is electrically connected with dial-up circuit, and dial-up circuit is electrically connected with first amplifier, and first amplifier is electrically connected with audio frequency transformer, modulation module and be electrically connected with first amplifier, and first amplifier is a power amplifier; Wherein further include: the AC/DC split circuit, it is serially connected between described off-hook on-hook circuit and the described audio frequency transformer; The negative supply circuit, it is electrically connected with second amplifier; And described second amplifier is a differential amplifier.

Described AC/DC split circuit includes a resistance and an electric capacity, and it is connected to the two ends of audio frequency transformer input coil, and the other end of this resistance and electric capacity is connected on the same pin of telephone line interface.

As other preferred embodiment of the present utility model, the Modem pond also can be designed to comprise the Modem of other a plurality of numbers.

Modem of the present utility model pond can connect a plurality of ordinary telephone wirings simultaneously, make the computer of data receiver can carry out the bi-directional data teletransmission simultaneously, itself and volume are little, and power supply is simple, need not operating personnel's management during work, thereby simplified the equipment disposition of data receiver.Transfer of data is reliable in the time of simultaneously can guaranteeing communication.

Claims (5)

1, a kind of modem bank is characterized in that including:

Host microcontroller, a plurality of modulator-demodulator and a plural number microcontroller, serial line interface;

Each modulator-demodulator is corresponding with a sub-microcontroller, and each modulator-demodulator links to each other with corresponding with it sub-microcontroller respectively, and each sub-microcontroller links to each other with host microcontroller, and host microcontroller links to each other with serial line interface.

2, modem bank as claimed in claim 1 is characterized in that:

Some I/O mouth lines of host microcontroller link to each other with corresponding I/O mouth line in each sub-microcontroller, constitute the data/address bus of host microcontroller and each sub-microcontroller;

The I/O mouth line of host microcontroller is a component group with two lines, and two lines in each group link to each other with two I/O mouth lines of each sub-microcontroller respectively, constitute the handshaking line of host microcontroller and each sub-microcontroller.

3, modem bank as claimed in claim 1 is characterized in that:

Corresponding with the P1 mouth of each sub-microcontroller mouthful of line of the P1 mouth of host microcontroller links to each other, and constitutes the data/address bus of host microcontroller and each sub-microcontroller;

Other I/O mouth line of host microcontroller is a component group with two lines, and two lines in each group link to each other with two I/O mouth lines of each sub-microcontroller respectively, constitute the handshaking line of host microcontroller and each sub-microcontroller.

4, modem bank as claimed in claim 1 is characterized in that:

Described modulator-demodulator and sub-microcontroller are respectively four, i.e. first modulator-demodulator, the first sub-microcontroller, second modem, the second sub-microcontroller, the 3rd modulator-demodulator, the 3rd sub-microcontroller, the 4th modulator-demodulator, the 4th sub-microcontroller;

First modulator-demodulator links to each other with the first sub-microcontroller, and second modem links to each other with the second sub-microcontroller, and the 3rd modulator-demodulator links to each other with the 3rd sub-microcontroller, and the 4th modulator-demodulator links to each other with the 4th sub-microcontroller;

Corresponding with the P1 mouth of each sub-microcontroller mouthful of line of the P1 mouth of host microcontroller links to each other, and constitutes the data/address bus of host microcontroller and each sub-microcontroller;

The P2.0 of host microcontroller links to each other with P2.7 with the P2.6 of the first sub-microcontroller respectively with P2.1 and constitutes the handshaking line of the host microcontroller and the first sub-microcontroller; The P2.2 of host microcontroller links to each other with P2.7 with the P2.6 of the second sub-microcontroller respectively with P2.3 and constitutes the handshaking line of the host microcontroller and the second sub-microcontroller; The P2.4 of host microcontroller links to each other with P2.7 with the P2.6 of the 3rd sub-microcontroller respectively with P2.5 and constitutes the handshaking line of host microcontroller and the 3rd sub-microcontroller; The P2.6 of host microcontroller links to each other with P2.7 with the P2.6 of the 4th sub-microcontroller respectively with P2.7 and constitutes the handshaking line of host microcontroller and the 4th sub-microcontroller.

5, as claim 1,2,3 or 4 described modem banks, it is characterized in that wherein said modulator-demodulator includes: telephone line interface, ring detecting circuit, microcontroller, off-hook on-hook circuit, audio frequency transformer, first amplifier, dial-up circuit, second amplifier, modulation module; Wherein, telephone line interface is electrically connected with ring detecting circuit, ring detecting circuit is electrically connected with microcontroller, telephone line interface and be electrically connected with off-hook on-hook circuit, off-hook on-hook circuit is electrically connected with audio frequency transformer, audio frequency transformer is electrically connected with second amplifier, and second amplifier is electrically connected with the modulation module, and the modulation module is electrically connected with microcontroller; Microcontroller is electrically connected with dial-up circuit, and dial-up circuit is electrically connected with first amplifier, and first amplifier is electrically connected with audio frequency transformer, modulation module and be electrically connected with first amplifier, and first amplifier is a power amplifier; Described modulator-demodulator further includes: the AC/DC split circuit, and it is serially connected between described off-hook on-hook circuit and the described audio frequency transformer; The negative supply circuit, it is electrically connected with second amplifier; And described second amplifier is a differential amplifier;

Described AC/DC split circuit includes a resistance and an electric capacity, and it is connected to the two ends of audio frequency transformer input coil, and the other end of this resistance and electric capacity is connected on the same pin of telephone line interface.

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