CN201995021U - Incoming call adapter of fixed telephone - Google Patents

Abstract

The utility model belongs to a communication device, in particular to an incoming call adapter of a fixed telephone. According to the device, the incoming line end of a junction box of a telephone set is connected with a loop (1) formed by connecting a rectification circuit, a time base circuit and a functional relay in series and an analog off-hook circuit (2) in parallel, an audio-frequency isolation capacitor of the analog off-hook circuit is connected with an audio-frequency circuit of a mobile telephone for transfer by an audio-frequency interface circuit, a sending button of the mobile telephone for transfer is connected with one normally open contact of the functional relay in parallel, and the other normally open contact of the functional relay is connected to the analog off-hook circuit in series. The incoming call adapter of the fixed telephone has the characteristics of simple structure and low use cost, is convenient and quick to operate, is convenient to popularize and can be widely applied to the fixed telephones of a company, a unit and a family.

Description

Landline telephone calls transfer device

Technical field

A kind of communication device that belongs to of the utility model, particularly a kind of landline telephone calls transfer device.

Background technology

In the routine work of company, unit, family, life, landline telephone is ubiquitous.The landline telephone that fixed-site is adorned has plurality of advantages, its cost is lower, cost of use is cheap, self do not need to charge, standby for a long time,, work rhythm quickening strong, the increasing situation of operating pressure in the face of current social competition, information exchanging process fast, accurately seem more and more important.Landline telephone is because its particular job mode; the crowd who often goes out, goes on business being busy with one's work; the situation that occurs missing through regular meeting; though landline telephone service department can realize the forwarding function of landline telephone by opening call forwarding function; but the transit rate after opening is with higher, and the cancellation after opening all will handle declaration formalities, and its operation is comparatively loaded down with trivial details; at present domestic common fixed telephone this function has not again brought very big inconvenience for daily use.

The utility model content

A kind of landline telephone calls transfer device that the utility model provides, have easy to operate, quick, simple in structure, use cost is cheap, the characteristics of being convenient to promote, but the landline telephone of extensive use company, unit, family.

The technical scheme that its technical problem that solves the utility model adopts is: in loop that 1. the terminal box end of incoming cables parallel connection of telephone set is in series by rectification circuit, time-base circuit and function relay with 2. simulate circuit for answering, the audio frequency of simulation circuit for answering is separated electric capacity and is connected the voicefrequency circuit that shifts with mobile phone by audio interface circuit, shift the normally open contact with the transmission button parallel function relay of mobile phone, another normally open contact of function relay is connected on the simulation circuit for answering.

Described time-base circuit adopts the NE555 integrated package, and the output of time-base circuit is connected with sound circuit, and sound circuit is connected to the audio frequency of simulation circuit for answering and separates electric capacity; The simulation circuit for answering adopts an adaptive resistance and an audio frequency to separate electric capacity and composes in parallel; Also connected in the terminal box end of incoming cables of a telephone set normally closed interlock of function relay.

The output of time-base circuit also is connected with the drive circuit that the three-terminal voltage-stabilizing integrated package is formed, and the output of drive circuit connects led state indication light-emitting diode; The terminal box end of incoming cables be in series with a phone forwarding function switch in the current circuit in parallel.

Operation principle of the present utility model is: by detecting the landline telephone ringing voltage, sample analysis rectification circuit to phone ringing voltage carries out time control output, and the restriction of transfer air time is a certain-length, dial with the telephone number that presets in the mobile phone to shifting by the function relay, possess phone simultaneously and shift sound prompt function, after treating that called party's mobile phone is connected, automatic switching on landline telephone end, the set conversation time arrives, time-base circuit stops output, function relay electric-loss and cause its corresponding contact to reset, shifting conversation stops, this adapter reenters holding state, realizes the on-hook of landline telephone and is in standby, finishes landline telephone and shifts call function.

The beneficial effects of the utility model are: have easy to operate, quick, simple in structure, use cost is cheap, the characteristics of being convenient to promote, but the landline telephone of extensive use company, unit, family.The cost of the phone call of this adapter is significantly less than the calling transfer expense of landline telephone, particularly shift handled the special service package of telecommunication department with mobile phone and user mobile phone after expense lower, and the operation of transfer is easier.

Description of drawings

Fig. 1, electrical block diagram of the present utility model.

Among the figure: 1 telephone office, 2 terminal boxes, 3 telephone sets, 4 rectification circuits, 5 charging circuits, 6 rechargeable batteries, 7 time-base circuits, 8 sound circuit unit, 9 drive circuits, 10LED state indication light-emitting diode, 11 audio interface circuit, 12 voicefrequency circuits, 13 send button, 14 wireless receiving and dispatchings send the unit, 15 transfer mobile phones, 16 wireless base stations, 17 user mobile phones, 18 user mobile phone audio units, 19 user mobile phone off-hook buttons, 20 user mobile phone wireless transmit/receive units, the adaptive resistance of RL, C separates electric capacity, K1 function relay, K2 phone forwarding function switch.

Embodiment

Below in conjunction with accompanying drawing embodiment, to this novel being further described.

The figure transfer is diverted from one use to another mobile phone 15 and is remained traditional voicefrequency circuit 12, sends button 13 and wireless receiving and dispatching send unit 14 to be critical piece, and it is constant that the structure of user mobile phone 17 is also continued to use existing mobile phone.

When the user will leave fixed telephone 3, phone forwarding function K switch 2 is allocated to the connection position, system is in holding state.The transfer that to normally the use dial line of drawing with transmission button 13 two ends of mobile phone 15 is in parallel with the normally open contact K1b of function relay K 1 again, to simulate the audio frequency of circuit for answering simultaneously and separate capacitor C connection audio interface circuit 11, connect mobile phone again and shift the earpiece holes of using mobile phone 15, guide to voicefrequency circuit 12, and the number of user mobile phone to be transferred 17 is manually imported transfer with in the mobile phone 15.

When fixed telephone 3 is received calling from telephone office 1, telephone set 3 sends ring sound, between tie point A, the B of terminal box 2 and telephone set 3, produce 60～90V ac ringing voltage signal at 2, carry out step-down, rectification through rectification circuit 4, output 12V direct current, deliver to the time-base circuit 7 of NE555 integrated package, time-base circuit 7 moves and produces 120 seconds time-delay, exports three tunnel control signals in the time of time-delay and delivers to 8 sound circuit unit 8, drive circuit 9 and function relay K 1 respectively.It is electric that first via output gets function relay K 1, cause normally open contact K1a, K1b to connect, and normally closed interlock K1c disconnects.K1a connects that back and adaptive resistance R are L shaped to become series connection, thereby make A, B two ends form state in parallel with RL, because A, B two ends resistance reduce, form the simulation off hook state, telephone office 1 stops to export ringing voltage, will be coupled through separating capacitor C from the AC audio signal of telephone office 1, deliver to 11 audio interface circuit, entering transfer with in the voicefrequency circuit 12 of mobile phone 15, normally open contact K1b connects simultaneously, begins to shift with the number dial-out of presetting in the mobile phone 15.The second tunnel control signal of time-delay triggers sound circuit unit 8, produces voice signal " phone is being transferred, and please wait a moment, this conversation 120 seconds " in limited time, separates capacitor C by audio frequency and feeds back to telephone office 1.The Third Road signal of time-delay is delivered to the drive circuit 9 that the three-terminal voltage-stabilizing integrated package is formed, and lights led state indication light-emitting diode 10, demonstrates telephone set 3 and is in the switching state.

Send the Subscriber Number dialing of presetting when shifting with mobile phone 15, send unit 14 to receive and be forwarded to user mobile phone 17 by wireless receiving and dispatching to wireless base station 16, user mobile phone wireless transmit/receive units 20 receives signal, after pressing user mobile phone off-hook button 19, voice are handled through user mobile phone audio unit 18, finish two-way call.120 second time then, time-base circuit 7 disconnects, function relay K 1 dead electricity, causing normally open contact K1a, K1b disconnection and normally closed interlock K1c to close resets, shifting conversation stops, time-base circuit 7 reenters holding state, has realized the on-hook of landline telephone and has been in standby, finishes landline telephone and shifts call function.

Claims (3)

1. landline telephone calls transfer device, it is characterized in that: the loop and the simulation circuit for answering that are in series by rectification circuit, time-base circuit and function relay in the terminal box end of incoming cables parallel connection of telephone set, the audio frequency of simulation circuit for answering is separated electric capacity and is connected the voicefrequency circuit that shifts with mobile phone by audio interface circuit, shift the normally open contact with the transmission button parallel function relay of mobile phone, another normally open contact of function relay is connected on the simulation circuit for answering.

2. by the described landline telephone calls transfer of claim 1 device, it is characterized in that: time-base circuit adopts the NE555 integrated package, and the output of time-base circuit is connected with sound circuit, and sound circuit is connected to the audio frequency of simulation circuit for answering and separates electric capacity; The simulation circuit for answering adopts an adaptive resistance and an audio frequency to separate electric capacity and composes in parallel; Also connected in the terminal box end of incoming cables of a telephone set normally closed interlock of function relay.

3. by the described landline telephone calls transfer of claim 2 device, it is characterized in that: the output of time-base circuit also is connected with the drive circuit that the three-terminal voltage-stabilizing integrated package is formed, and the output of drive circuit connects led state indication light-emitting diode; The terminal box end of incoming cables be in series with a phone forwarding function switch in the current circuit in parallel.