CN2523126Y

CN2523126Y - Automatic switching device from telephone set to building intercom

Info

Publication number: CN2523126Y
Application number: CN 01257704
Authority: CN
Inventors: 刘壮; 李继东
Original assignee: HUIHE ELECTRONIC TECHNOLOGY Co Ltd GUANGDONG
Current assignee: Guangdong He Hui Intelligent Electronic Engineering Co., Ltd.
Priority date: 2001-10-30
Filing date: 2001-10-30
Publication date: 2002-11-27
Anticipated expiration: 2011-10-30

Abstract

A telephone and building talking device automatic switcher comprises a telephone exterior line interface, a building talking device interface and a telephone interface, the utility model is characterized in that the utility model is also provided with a circuitry switch circuit, a telephone rolling off machine detection circuit, a telephone ringing detection circuit, a DTMF detection circuit, a building talking load circuit, an unlock circuit, a building talking device state detection circuit, a telephone power supply circuit and a singlechip control circuit, wherein, the outputs of the telephone rolling off machine detection circuit, the telephone ringing detection circuit, the DTMF detection circuit and the building talking device state detection circuit are all sent to the singlechip control circuit, and the outputs of the singlechip control circuit are respectively sent to the circuitry switch circuit, the building talking load circuit, the unlock circuit and the telephone power supply circuit. The utility model can ensure the telephone to be automatically connected with the telephone exterior line or the building talking device, which is convenient for the telephone exterior line and the telephone interface. The utility model can directly realize the building talking of the wireless telephone in movement with good sound quantity and high anti-jamming capability.

Description

Telephone set and building talkback device automatic switchover device

The utility model relates to a kind of switch, particularly a kind of telephone set and building talkback device automatic switchover device.

Building talkback device in the past and telephone set are to realize its function separately, are provided with any contact between the two, have wasted resource, can not one-object-many-purposes.The wireless talkback circuit that adopted of the wireless building talkback unit in the past circuit of right and wrong special use often is operated in single-frequency in addition, and stability and anti-interference are poor.

The purpose of this utility model is to provide a kind of telephone set that makes can realize that not only building talkback, building are unblanked and the building warning function, and does not influence normal telephone set and the building talkback device automatic switchover device that uses of telephony feature.

The purpose of this utility model can reach by following measure: a kind of telephone set and building talkback device automatic switchover device, comprise the outside line interface, the building talkback device interface, telephone interface, it is characterized in that: also be provided with the circuit commutation circuit, the telephone set picking/hanging machine detection circuit, the ringing telephone stations testing circuit, the DTMF testing circuit, building talkback telephone load circuit, unlock circuit, building talkback unit state testing circuit, the telephone set power supply circuits, single chip machine controlling circuit, the telephone set picking/hanging machine detection circuit, the ringing telephone stations testing circuit, the DTMF testing circuit, single chip machine controlling circuit is all delivered in the output of building talkback unit state testing circuit, and the circuit commutation circuit is delivered in the output of single chip machine controlling circuit respectively, building talkback telephone load circuit, unlock circuit, the telephone set power supply circuits.

The utility model can also reach by following measure: the output of single chip machine controlling circuit is also delivered to the building remote alarm interface by warning circuit.Described switch can be installed in the base of building talkback subscriber's extension station, telephone set or cordless telephone, also can independently become the connector with three ports.The base stage of triode Q21 links to each other with telephone wire by voltage stabilizing didoe D4, resistance R 28 in the telephone set picking/hanging machine detection circuit, and the collector electrode of Q21 links to each other with the P1.3 end of integrated circuit U3 in the single chip machine controlling circuit.The base stage of triode Q29 links to each other with diode D7, D8 on the telephone wire by resistance R 16, capacitor C 23 in the ringing telephone stations testing circuit, and the collector electrode of Q29 is held with the P1.6 of integrated circuit U3 and linked to each other.7 pin of integrated circuit U1 link to each other with telephone wire by capacitor C 6, resistance R 12 in the DTMF testing circuit, and its D1～D4 end links to each other with P30～P33 end of integrated circuit U3 respectively.Its utmost point of triode Q19 joins with interface by resistance R 13, switch SW 1 in the building talkback unit state testing circuit, the P1.5 end of the collector electrode of Q19 and integrated circuit U3 joins, 1.7 ends of U3 link to each other with the base stage of triode Q2, Q3, Q16 respectively, 1.4 ends of U3 by resistance R 4 with it the base stage of utmost point Q1 link to each other.The P1.1 of integrated circuit U3 end joins by the base stage of triode Q30 in resistance R 11 and the warning circuit in the single chip machine controlling circuit, and the collector electrode of Q30 joins by resistance R 5 and the base stage of triode Q4, and the collector electrode of Q4 and electromagnet RL4 join.

Fig. 1 is a functional-block diagram of the present utility model;

Fig. 2～Fig. 6 is an electrical schematic diagram of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing (embodiment):

With reference to Fig. 1, the utility model comprises circuit commutation circuit 1, telephone set picking/hanging machine detection circuit 2, ringing telephone stations testing circuit 3, DTMF testing circuit 4, building talkback telephone load circuit 5, unlock circuit 6, building talkback unit state testing circuit 7, telephone set power supply circuits 8, warning circuit 9, single chip machine controlling circuit 10, outside line interface LINE1, LINE2, building talkback device interface B1, B2, telephone interface TEL1, building remote alarm interface B3 etc.

As shown in Figure 2: LINE1, LINE2 connect outside line, and TEL1 connects telephone set.Generally, relay R L3 is in release condition.Outside line is through rectifier bridge that D7, D8, D12, D13 formed, and normally-closed contact 3 that RL3 is first group and common 1 are directly connected to telephone set, like this, can directly pass in and out in telephone signal at ordinary times, does not influence the normal use of telephony feature, and is very convenient.

R28, D4, Q21, R79 form the phone picking/hanging machine detection circuit among Fig. 2, and the Q21 collector electrode is connected to single-chip microcomputer U3.During off-hook, the high level on the telephone wire does not puncture D4 to phone, and the current collection of Q21 is low level very; During off-hook on the telephone wire voltage drop low, D4 does not puncture, the Q21 current collection is high level very.The collector electrode of Q21 can provide telephone set dislodging machine status signal.

C23, R16, R15, R80, Q29 form the phone ringing testing circuit among Fig. 2, and the Q29 collector electrode is connected to single-chip microcomputer U3.When ring, alternating current is by C23, and the Q29 collector electrode presents low level; The collector electrode of Q29 presents high level when not having ring, so can provide the ringing telephone stations status signal.

U1, R12, R2, C6, C8, OSC1 form the DTMF testing circuit among Fig. 2, and wherein U1 is the DTMF detection chip.When telephone set is pressed the numerical key of certain specific function, corresponding D TMF signal appears on the TEL1, after DTMF detection chip U1 detects this TDMF signal, present digital signal corresponding on D1～D4 pin.Single-chip microcomputer U3 reads the digital command signal on D1～D4 pin, makes the corresponding instruction action.

B1 is connected the voice and the control channel of building talkback device among Fig. 3 with B2, and B3 connects the warning passage of building talkback device, and TEL2 connects the receiver microphone amplifying circuit of building talkback device users extension set, and SPEAKER is the receiver loudspeaker.R3, Q2, R29 form building talkback telephone load circuit.Q1, R4 form the building unlock circuit.R27, R21, R18, R14, Q6, Q3 form the telephone set power supply circuits.

R13, R50, R78, Q19 form building talkback unit state testing circuit among Fig. 3, and the Q19 collector electrode is connected to single-chip microcomputer U3.The ring high level signal that transmits when the building talkback device when B1 comes in, the Q19 conducting, its collector electrode presents low level, single-chip microcomputer is set to high level with R after capturing this low level, Q16, Q2, Q3 conducting simultaneously.The Q16 conducting makes relay R L3 adhesive, first group the common 1 that is RL3 breaks away from normally-closed contact 3, the common 6 that RL3 is second group is connected to normally opened contact 7, this moment, telephone set was connected to the building talkback device, resistance R 30 is connected between the output and ground of rectifier bridge, causes the pseudo-busy state of phone; During the Q2 conducting, building talkback telephone load R3 connects, and is equivalent to building talkback subscriber's extension station off-hook; The Q3 conducting makes the Q6 conducting, and power supply VCC powers to telephone set.The voice signal of phone is communicated with building talkback device realization two-way call by the coupling of C42, C43.R10, Q20, R81 form the voice negative circuit to suppress self-excitation.When owner's off-hook and doorway guest's talk-through and after having confirmed guest's identity, press the function digit key (such as " 8 ") of telephone set, send unlock command, be equivalent to the outside dialing of telephone set, the corresponding dtmf signal of function digit key appears in the TEL1 place, after this dtmf signal is discerned by DTMF testing circuit as shown in Figure 2, send single-chip microcomputer U3 to, single-chip microcomputer U3 is changed to high level with H at once, the conducting of Q1 pin, a low level unlocking signal appears in B1, the interlock circuit of notice building conversational system.As a same reason, if owner thinks that the person that has come is the uninvited guest, press the function digit key (such as " 2 ") of telephone set, send alarm signal to the keeper of sub-district, after single-chip microcomputer is caught this information, start warning circuit as shown in Figure 5, M is changed to low level, N is changed to high level, U30, Q4 conducting, relay R L4 folds (1 pin contacts with 2 pin), sends the low level alarm signal at B3, the interlock circuit of notice building talkback device.

As shown in Figure 4: 7812 and 7805 form power supply stabilization circuit, and use on the burning voltage power supply road of output 12V and 5V.As shown in Figure 6: the automatic control of entire circuit is controlled by single-chip microcomputer U3 software programming.The model of integrated circuit U1 is MC145436, and the model of U3 is 89C2051.

The utility model has following advantage compared to existing technology:

1, can make telephone set automatically connect outside line or building inter-speaking device, outside phone Line and telephone interface are convenient.

2, can directly use cordless telephone in movement, to realize building talkback, its speech Quality is good, strong interference immunity.

3, the circuit advantages of simple is easy for installation, and volume is small and exquisite, can directly utilize most of families in the parlor, the existing telephone set in bedroom, toilet realizes the function that building talkback, building are unblanked and building are reported to the police.And do not influence the normal use of telephony feature.

Claims

1, a kind of telephone set and building talkback device automatic switchover device, comprise outside line interface (LINE1, LINE2), building talkback device interface (B1, B2), telephone interface (TEL1), it is characterized in that: also be provided with circuit commutation circuit (1), telephone set picking/hanging machine detection circuit (2), ringing telephone stations testing circuit (3), DTMF testing circuit (4), building talkback telephone load circuit (5), unlock circuit (6), building talkback unit state testing circuit (7), telephone set power supply circuits (8), single chip machine controlling circuit (10), telephone set picking/hanging machine detection circuit (2), ringing telephone stations testing circuit (3), DTMF testing circuit (4), single chip machine controlling circuit (10) is all delivered in the output of building talkback unit state testing circuit (7), and circuit commutation circuit (1) is delivered in the output of single chip machine controlling circuit (10) respectively, building talkback telephone load circuit (5), unlock circuit (6), telephone set power supply circuits (8).

2, switch according to claim 1 is characterized in that: the output of single chip machine controlling circuit (10) is also delivered to building remote alarm interface (B3) by warning circuit (9).

3, switch according to claim 1 is characterized in that: described switch can be installed in the base of building talkback subscriber's extension station, telephone set or cordless telephone, also can independently become the connector with three ports.

4, switch according to claim 1, it is characterized in that: the base stage of triode Q21 links to each other with telephone wire by voltage stabilizing didoe D4, resistance R 28 in the telephone set picking/hanging machine detection circuit (2), and the collector electrode of Q21 links to each other with the P1.3 end of integrated circuit U3 in the single chip machine controlling circuit (10).

5, switch according to claim 1, it is characterized in that: the base stage of triode Q29 links to each other with diode D7, D8 on the telephone wire by resistance R 16, capacitor C 23 in the ringing telephone stations testing circuit (3), and the collector electrode of Q29 is held with the P1.6 of integrated circuit U3 and linked to each other.

6, switch according to claim 1 is characterized in that: 7 pin of integrated circuit U1 link to each other with telephone wire by capacitor C 6, resistance R 12 in the DTMF testing circuit (4), and its D1～D4 end links to each other with P30～P33 end of integrated circuit U3 respectively.

7, switch according to claim 1, it is characterized in that: its utmost point of triode Q19 joins with interface (B1) by resistance R 13, switch SW 1 in the building talkback unit state testing circuit (7), the P1.5 end of the collector electrode of Q19 and integrated circuit U3 joins, 1.7 ends of U3 link to each other with the base stage of triode Q2, Q3, Q16 respectively, 1.4 ends of U3 by resistance R 4 with it the base stage of utmost point Q1 link to each other.

8, switch according to claim 1, it is characterized in that: the P1.1 of integrated circuit U3 end joins by resistance R 11 and the base stage of the middle triode Q30 of warning circuit (9) in the single chip machine controlling circuit (10), the collector electrode of Q30 joins by resistance R 5 and the base stage of triode Q4, and the collector electrode of Q4 and electromagnet RL4 join.