CN2341327Y - Calling number indicator of telephone - Google Patents

Abstract

The utility model relates to an identifying and display device for the identity number of a telephone calling party, the utility model is connected in series between a telephone and a telephone external line, and the utility model can display the telephone number or identity identification number of the calling party. The utility model comprises a single chip computer control circuit, an LCD driving display circuit, a ringing signal detecting circuit, a calling information receiving circuit which is used for receiving information in type of FSK, DTMF, etc. which is sent out by an exchanger in the ringing period, a calling party DTMF signal receiving circuit and a speech prompt signal generating circuit. The utility model can not only identify and display the calling number provided by the exchanger but also can identify and display the calling identity number which is not sent out by the exchanger.

Description

The caller identity number identification display device of telephone set

The utility model relates to a kind of servicing unit of telephone set, relates to a kind of caller identity number identification display device of telephone set or rather.

In order effectively to solve the worry that harassing call, threatening phone call, wrong number phone etc. bring to the telephone subscriber, the caller ID display can be installed on telephone set, the telephone number of display of calling side in ringing telephone stations, the user can be received calls selectively, can avoid unnecessary phone to disturb.Existing caller ID display normally utilizes the special service function of SPC telephone exchange to realize, when the user after telephone office has applied for this kind special service function, exchange opportunity is the interspersed telephone number of sending caller in ringing-signal feeding, and this user just can see the calling party phone number on the caller ID display of telephone set.

Above-mentioned caller ID display mainly comprises power supply, control circuit, DTMF double-tone multi-frequency decoder, display driver circuit and LCD display.Its operation principle is: the calling party calls out called by stored-program control exchange, the caller ID display of callee's telephone set receives the DTMF information of being sent by switch, under the control of control circuit, through DTMF decoder, display driver circuit, final on display the telephone number of display of calling side.

Though this caller ID display has suitable practical value, at present can not popularization and application, one of its reason is: when switch can not provide this special service function, this caller ID display device just can not be worked.We are also noted that in addition, because telecommunications network is a huge worldwide network, even opened the caller identification business in certain area, also still having the part caller ID can not provide by switch, as the telephone subscriber who is connected with private branch exchange in the unit, when private branch exchange was not supported the caller ID Presentation Function, even the switch of telecommunication department can be opened the caller ID Presentation Function, its intercommunication phone still can not the display of calling number.

The purpose of this utility model is the caller identity number identification display device of a kind of telephone set of design, needn't rely on switch fully dialing number information is provided, the caller ID display is automaticallyed switch to work between the dual mode, promptly when the switch at callee user place can provide the caller ID service function, the operating state of this display unit is reception and shows the calling telephone number information of being sent by switch, and when local switch can not provide this special clothes function, then be transformed into automatically and receive the also operating state of display of calling side's identification number.

The purpose of this utility model is to realize like this, the caller identity number identification display device of telephone set, comprise power supply, bridge rectifier, single chip machine controlling circuit drives display circuit with the LCD that is connected with single chip machine controlling circuit, caller information receiving circuit during ringing signal test circuit and the ring, described bridge rectifier is connected between outside line and telephone set, caller information receiving circuit during described ringing signal test circuit and the ring is connected between bridge rectifier and telephone set, it is characterized in that: also include calling party's touch-tone signal receiving circuit and voice suggestion signal generating circuit; Calling party's touch-tone signal receiving circuit one end is connected between bridge rectifier and telephone set, and the other end is connected with described single chip machine controlling circuit; Voice suggestion signal generating circuit one end is connected between bridge rectifier and telephone set, and the other end is connected with described single chip machine controlling circuit.

Also include the transistor relay drive circuit, be connected with described single chip machine controlling circuit, the relay moving contact is serially connected between described calling party's touch-tone signal receiving circuit output and bridge rectifier output respectively and between voice suggestion signal generating circuit output and bridge rectifier output.

Also include the phone off hook state control circuit that constitutes by photoelectrical coupler, illuminating circuit one side of photoelectrical coupler is serially connected in the current circuit between described bridge rectifier and telephone set, and optical receiving circuit one side of photoelectrical coupler is connected with described single chip machine controlling circuit.

The caller identity number identification display device of the utility model telephone set, be connected between outside line and telephone set, the bell signal of being sent by switch is also delivered to the caller information receiving circuit during ringing signal test circuit and the ring when delivering to telephone set, if during this ring, switch is sent calling party's telephone number information simultaneously here, then the caller information receiving circuit during the ring has and outputs signal to single chip machine controlling circuit, and single chip machine controlling circuit receives calling telephone number and send LCD to drive display circuit and shows; If during this ring, switch is not sent calling party's telephone number information, then the caller information receiving circuit during the ring does not just output signal to single chip machine controlling circuit, this moment, single chip machine controlling circuit started the action of transistor relay drive circuit earlier, its moving contact closure inserts voice suggestion signal generating circuit and calling party's touch-tone signal receiving circuit in the telephone line, single chip machine controlling circuit is restarted the voice suggestion signal generating circuit, send the voice messaging that presets to the calling party, prompting the other side imports its identification number, key in the identification number of its DTMF form the calling party after, calling party's touch-tone signal receiving circuit receives this identification number information and send single chip machine controlling circuit, and single chip machine controlling circuit receives this caller ID number information and send LCD to drive display circuit and shows.

The caller identity number identification display device of the utility model telephone set can automatically switch and work between the dual mode, when the switch at callee user place can provide the caller ID service function, the standard signal that this display receives and the demonstration switch is sent; And when local switch does not provide this special clothes function, then dial in DTMF identification signal by the signal format of arranging by built-in sound circuit prompting calling party, send apparent, stores processor then.Therefore, can carry out the correct identification of two kinds of operating states and conversion automatically before the callee answers calling, this is the maximum characteristics of the utility model technology, thereby has increased the flexibility that product uses, and can receive caller's information to greatest extent.

Further specify technology of the present utility model below in conjunction with embodiment and accompanying drawing

Fig. 1 is the caller identity number identification display device structural principle block diagram of telephone set

Fig. 2 is the enforcement circuit diagram of theory diagram shown in Figure 1

Fig. 3 is the caller identity number identification display device workflow block diagram of telephone set

Referring to Fig. 1, Fig. 2, caller information receiving circuit 13, calling party's dtmf signal receiving circuit 14, voice suggestion signal generating circuit 15, single chip machine controlling circuit 16 and LCD that the caller identity number identification display device 10 of telephone set mainly includes during bridge rectifier 11, ringing signal test circuit 12, the ring drive display circuit 17.Omitted the power circuit that working power is provided for the above-mentioned functions parts among the figure.

Bridge rectifier 11 can prevent that outside line from damaging the telephone set element because of polarity reversal, commutes dialing tone between switch and telephone set, busy tone, ring-back tone, voice signal etc. and also transmits through this circuit.

Single chip machine controlling circuit 16 is a critical piece with the MCS-51 series monolithic, voice suggestion signal generating circuit 15 adopts integrated DAC0832, calling party's dtmf signal receiving circuit 14 adopts integrated MT8890, caller information receiving circuit 13 during the ring adopts integrated SB7800, ringing signal test circuit adopts integrated LS1240, also is connected with shaping circuit 18 (adopting discrete component or integrated component) at the ringing signal test circuit output during enforcement.J1, J2, J3 are respectively the relay contacts that is driven by transistor T 1, T2, T3 among Fig. 2, and T4 is a photoelectrical coupler.LCD drives the LCD MODULE that display circuit 17 can adopt general band decoder driver circuit.

Initial condition after the start, Single-chip Controlling three relays are off state, J1, J2, J3 all disconnect, and telephone set network 20 is not produced any influence.When the also outwards dialing of local user's off-hook, when conversing, display unit 10 inside can not produce any action, until local user's on-hook.When bell signal was sent in outside line, ringing signal test circuit LS1240 had signal output, send single-chip microcomputer MCS-51 after shaping circuit 18 shapings.If during this ring, switch is also sent calling party's information such as telephone number here, comprises the information of standards such as FSK, DTMF, then the data terminal D of the caller information receiving circuit SB7800 during the ring ₀-D ₃Have signal output, supply the single-chip microcomputer receiving record and send LCD to drive display circuit 17 to show; If during this ring, switch is not sent information such as calling number, i.e. the data terminal D of caller information receiving circuit SB7800 during the ring here ₀-D ₃There is not signal output, after delay after a while, the P1.0 to P1.2 of single-chip microcomputer provides high level signal, transistor T 1, T2, the T3 conducting, contact J1, J2, the J3 closure, single-chip microcomputer starts voice suggestion signal generating circuit DAC0832 by its P1.3 mouth then, through digital to analog conversion voice signal is sent on the telephone line, prompting calling party button sends the identification number (the calling party phone machine must be the dual-tone multifrequency phone) of making an appointment through both sides, this dual-tone multifrequency number should be set an end mark, as " # " or " * ", the DTMF identification number that is sent by calling party's phone is received by calling party's dtmf signal receiving circuit MT8890 and by its data terminal D ₀-D ₃Send single-chip microcomputer, control shows this caller ID number.This display unit 10 is at above-mentioned duration of work, if local user's off-hook then makes photoelectrical coupler T4 conducting because of forming current circuit, the P3.5 end of single-chip microcomputer will receive a low-potential signal, single-chip microcomputer can be controlled immediately and disconnect transistor T 1, T2, T3, guarantees user's normal talking.If the user never has off-hook, then single-chip microcomputer can write down this call information, and the identification number of caller is made stores processor, in order to checking.

Referring to Fig. 3, the workflow of the caller identity number identification display device of telephone set shown in the figure.Flow process shows among the figure, and the normal telephone that this display unit does not influence the user receives and number dialing telephone call.When during ring, sending into the calling number of standards such as DTMF, FSK when switch, can receive and show (step 302,303,304), during this period if user's off-hook then enters talking state (step 305,307,309), if the user is off-hook or do not exist not, then this information of record and demonstration (step 306,308,309) when calling party's on-hook after.When dereliction during the ring is called out the numbers sign indicating number when sending into, this display unit is being sent suggestion voice automatically after suitably postponing, and prompting the other side transfers to identification number and finishes with end mark, receives and shows (step 310,311) for display unit 10.If during this period, called subscriber's off-hook is replied, and then enters talking state (step 305,307,309), if the called subscriber stays out or off-hook not, then this information of record and demonstration (step 306,308,309) after calling party's on-hook judged for the called subscriber.

The caller identity number identification display device of the utility model telephone set, both can be independent of telephone set is provided with outward, also can merge and be provided with telephone set, compare with other caller ID display device, its projecting point is that the caller identification signal that both can utilize the special clothes function of switch to be sent shows, can utilize the calling party to show in the identification signal of sending after voice suggestion again.

Claims (3)

1. the caller identity number identification display device of a telephone set, comprise power supply, bridge rectifier, single chip machine controlling circuit drives display circuit with the LCD that is connected with single chip machine controlling circuit, caller information receiving circuit during ringing signal test circuit and the ring, described bridge rectifier is connected between outside line and telephone set, caller information receiving circuit during described ringing signal test circuit and the ring is connected between bridge rectifier and telephone set, it is characterized in that: also include calling party's touch-tone signal receiving circuit and voice suggestion signal generating circuit; Calling party's touch-tone signal receiving circuit one end is connected between bridge rectifier and telephone set, and the other end is connected with described single chip machine controlling circuit; Voice suggestion signal generating circuit one end is connected between bridge rectifier and telephone set, and the other end is connected with described single chip machine controlling circuit.

2. the caller identity number identification display device of telephone set according to claim 1, it is characterized in that: also include the transistor relay drive circuit, be connected with described single chip machine controlling circuit, the relay moving contact is serially connected between described calling party's touch-tone signal receiving circuit output and bridge rectifier output respectively and between voice suggestion signal generating circuit output and bridge rectifier output.

3. the caller identity number identification display device of telephone set according to claim 1, it is characterized in that: also include the phone off hook state control circuit that constitutes by photoelectrical coupler, illuminating circuit one side of photoelectrical coupler is serially connected in the current circuit between described bridge rectifier and telephone set, and optical receiving circuit one side of photoelectrical coupler is connected with described single chip machine controlling circuit.

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