CN201557157U - On-line operating state monitoring device for fixed telephone - Google Patents

Abstract

The utility model discloses an on-line operating state monitoring device for a fixed telephone. A circuit main loop of the on-line monitoring device is formed by coupling a DTMF (dual-tone multifrequency) signal encoding and decoding chip, an incoming information identification chip, an analog-hook and hook detection circuit and a serial port communication circuit on a main control chip. In the on-line monitoring device, caller IDs are identified by the incoming information identification chip and sent to an MCU (Micro programmed Control Unit); a telephone number dialed out by doubling telephones is sent to the MCU after being decoded by the DTMF signal encoding and decoding chip; and the MCU detects the hook state through the hook detection circuit, detects the calling state through a ring-back tone detection circuit in the DTMF signal encoding and decoding chip, sends DTMF dialing signals, and performs soft dialing treatment through the DTMF signal encoding and decoding chip according to the call instruction and call number sent from a main-control computer through the combination of a serial port and an RS 232 electrical level transfer circuit. The monitoring device has the advantages of favorable performance, reliable operation and low cost, and can achieve a more prefect on-line monitoring.

Description

Landline telephone user mode on-line monitoring device

Technical field

The utility model relates to Automatic Detection and Control technology, telecommunication technology, signal processing and analytical technology, belongs to fields such as computer communication technology, is specifically related to a kind of landline telephone user mode on-line monitoring device.

Background technology

As everyone knows, the landline telephone application is very extensive, arrives enterprises and institutions greatly, and little all have use to average family, particularly be applied to enterprises and institutions as the office Service Phone, as enterprise's office Service Phone, government bodies' office Service Phone, army and police unit's office Service Phone or the like.The operating position of these phones often needs supervision or information stores and management, and requirement can be discerned called number, and response status is judged and record.For the office or Service Phone can discern caller ID and the record whether in time answer and the duration of call, realize management, identification and maintenance function with this to customer information, simultaneously, can detect the telephone receiving state again, improve service rate and quality with this, system also tackles the calling number of doubling phone and discerns, call state is judged and record, thereby realize caller monitoring to office or Service Phone, improve the phone service efficiency, reduce cost of use, the promptness of judge service and standardization or the like.The management that can realize electronic business card for the homebrew phone and phone are related with electronic business card, can also realize that phone uses information inquiry and phone to use the function of supervision.

At present, telecommunication system has the caller ID service business, in its phone data host-host protocol, has the asynchronous data transfer protocol of the suggestion FSK standard of ITU-TV.23, and this agreement is defined in the transmission of carrying out incoming information after the phone ring for the first time.Touch-tone signal (DTMF) is a kind of subscriber signaling between telephone set and the switch in the telephone system, the DTMF codec converts keystroke or digital information to double-audio signal and transmission, in the dtmf signal of receiving, detect the existence of keystroke or digital information, dtmf signal is made of the audio signal stack of two frequencies, the frequency of these two audio signals is from two groups of preallocated group of frequencies: line frequency group and row are group frequently, each is to numeral of the unique expression of such audio signal or symbol, but conventional online monitoring image data seldom causes function still not comprehensive.

Summary of the invention

At the monitoring requirement of landline telephone operating state, the utility model provides a kind of landline telephone user mode on-line monitoring device, this supervising device function admirable, and reliable operation, with low cost, realize the more perfect on-line monitoring of function.

Technical solution of the present utility model is: the circuit major loop of this on-line monitoring device is connected on the main control chip by dtmf signal codec chip, incoming information identification chip, simulation dislodging machine and picking/hanging machine detection circuit and serial communication circuit and constitutes; In this device, caller ID is by the identification of incoming information identification chip and send to MCU, the number that the doubling phone is transferred to uses the dtmf signal codec chip to decode and send MCU afterwards, MCU detects dislodging machine state by picking/hanging machine detection circuit, and utilize the ring-back tone testing circuit in the dtmf signal codec chip to monitor call state, call instruction and call number that MCU sends in conjunction with the RS232 level shifting circuit by serial ports according to main control computer, send the dtmf dialing signaling by the dtmf signal codec chip, carry out soft dialing and handle.

Concrete technical solution of the present utility model is: (1) is caller ID monitoring and ring detection chip with HT9032, after the first time, ring was finished, HT9032 detects incoming information, after information detects and finishes, MCU reads the incoming information that the DOUT pin of HT9032 sends, and therefrom isolates the incoming call number, simultaneously, MCU reads the dislodging machine state that picking/hanging machine detection circuit detects, and by serial ports telephone number and the dislodging machine state that detects is sent to monitoring host computer; (2) be the dtmf signal codec chip with MT8888, carry out the detection to doubling phone calling number, carry out soft dialing by the dtmf signal codec chip, in dialing procedure, MCU uses interrupt mode to read each Outgoing Number that MT8888 monitors; (3) after detecting number call and finishing, MCU control MT8888 enters and calls out the monitoring pattern, carries out the caller state-detection, as long as have a ring-back tone or busy-back signal to arrive, just can identify ring-back state or line be busy state.

The utility model is simple in structure, function admirable, reliable operation, with low cost, realization is to the fast detecting of caller ID, can detect states such as dislodging machine, can detect the calling number of doubling phone simultaneously, after detecting the caller end, can enter the monitoring of caller state automatically, caller phone the other side responsive state is judged, in addition, can also carry out the dialing of software control by this device.

Description of drawings

Fig. 1 is that circuit major loop of the present utility model connects block diagram.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1, the utility model uses HT9032C to carry out caller ID and detects and identification, this chip has the ring measuring ability simultaneously, after the bell signal of MCU identification HT9032C is effective, can enter the identifying of caller ID, and detect off-hook and hook state by the picking/hanging machine detection circuit of this device, can judge in conjunction with corresponding host computer monitoring software time and duration etc. are answered and answered to incoming call whether; Use MT8888 to realize the detection and the transmission of dtmf signal, thereby realize monitoring, can also realize soft dialing in conjunction with simulation dislodging machine circuit simultaneously, to realize that the number that monitors is carried out functions such as clawback or active call the Outgoing Number of monitored phone; In addition, MT8888 also has call model (CP pattern), can realize call state is monitored, and detecting current is ring-back state or busy tone state, thereby judges whether outgoing call information such as is answered; In the device course of work, MCU gathers various data and state information from HT9032C, MT8888 and picking/hanging machine detection circuit, by the level shifting circuit of serial ports in conjunction with RS232, realizes communicating with the upper monitoring main frame; In addition, because telephone system is used different current potentials with computer system, the power supply of two systems and ground can not direct interconnection, therefore, before the RS232 level conversion, use photoelectricity to isolate, thereby realize the Signal Spacing of two systems, use the DC-DC power isolation module simultaneously, respectively to the isolation of powering of this device main circuit and RS232 level switch module, to realize the potential isolation of telephone system and computer system.

Claims (3)

1. landline telephone user mode on-line monitoring device is characterized in that: the circuit major loop of this on-line monitoring device is connected on the main control chip by dtmf signal codec chip, incoming information identification chip, simulation dislodging machine and picking/hanging machine detection circuit and serial communication circuit and constitutes.

2. landline telephone user mode on-line monitoring device according to claim 1 is characterized in that: connect photoelectric isolation module on serial communication circuit.

3. landline telephone user mode on-line monitoring device according to claim 1 is characterized in that: use the DC-DC power isolation module simultaneously on main circuit and monitoring host computer, realize the potential isolation of telephone system and computer system.