CN201846398U

CN201846398U - Telephone switchboard bridge

Info

Publication number: CN201846398U
Application number: CN2010202812186U
Authority: CN
Inventors: 戴啟力; 谈莹青; 李雪强
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2010-08-04
Filing date: 2010-08-04
Publication date: 2011-05-25
Anticipated expiration: 2020-08-04

Abstract

The utility model relates to a telephone switchboard device and discloses a telephone switchboard bridge. The telephone switchboard bridge comprises a telephone interface circuit, an audio amplifying frequency discrimination shaping circuit and a singlechip, wherein the telephone interface circuit is connected with a dispatching exchange user port through a telephone wire and is also connected with the singlechip and the input end of the audio amplifying frequency discrimination shaping circuit; and the output end of the audio amplifying frequency discrimination shaping circuit is connected with the singlechip. A dispatcher can hook on after calling the telephone switchboard bridge. The telephone switchboard bridge enters the off-hook calling state to form the three-party calling with two external lines so as to play a role of bridge. If any one or two parties of the two external lines hook on, the telephone switchboard bridge sends out an on-hook instruction when receiving a busy signal through the singlechip so as to control the telephone interface circuit to be converted into the on-hook state from the off-hook state and achieve the function of automatically detaching the bridge, thereby releasing an external line relay circuit and judging whether a user hooks on or not without monitoring the calling of the user by the dispatcher at any time. The telephone switchboard bridge has the advantages of simple structure and favorable use effect, is easy for installation and can work stably.

Description

A kind of call forwarding bridge

Technical field

The utility model relates to a kind of telephone switching apparatus.

Background technology

Most program controlled telephone dispatcher do not possess outside line (analogue loop relaying) changes the outside line function, popular saying is exactly the function that outside line is thrown into changes the outside line user by the dispatcher after the program controlled telephone dispatcher, reason is after the dispatcher finishes outside line commentaries on classics outside line, article two, outside line is communicated with, the on-hook of end of conversation either or both, the program controlled telephone dispatcher has no idea to differentiate whether on-hook of outside line, do not know when take out stitches, can cause relaying " the line is busy for a long time " to throw into and get phone, so general dispatcher does not all have this function.

The actual user needs outside line to change the outside line function, realizes that at present it is that the dispatcher finishes the permanent formation Three-Way Calling in switching back that the way of outside line function is changeed in outside line, and after the dispatcher heard either party's on-hook, dispatcher's on-hook dispatcher was torn outside line automatically open.The scheduling phone is equivalent to " bridge ", and dispatcher's on-hook is equivalent to tear open " bridge ".When outside line user incoming call dispatcher, earlier to look for another outside line user's communication with dispatcher's session description, the dispatcher forms Three-Way Calling after relaying changes outside line, and dispatching telephone can not on-hook, in case two relaying outside lines of on-hook are taken out stitches.Change relay function in order to finish relaying, must have individual dispatcher to operate, finishing the switching back moment and will monitor two outside line subscriber phones whether people's on-hook is arranged, hear busy tone after on-hook tear outside line open.Guaranteeing behind the end of conversation can release trunk, keeps relaying unimpeded.Otherwise two relaying can not discharge, and is in the seizure condition outside line and does not come in.

There is following problem in prior art in actual applications:

1. take dispatching telephone, influence the dispatch control instruction and pass on.

2. two is that the dispatcher wants monitoring users conversation constantly, judges whether on-hook of user.

Timely release trunk road.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of call forwarding bridge, he has employing telephone wire is inserted telephone interface circuit, telephone interface circuit is sent to single-chip microcomputer with the bell signal that obtains, single-chip microcomputer instructs to telephone interface circuit according to this bell signal output off-hook, the control telephone interface circuit enters off hook state, this moment, telephone interface circuit exported audio frequency to audio frequency amplification frequency discrimination shaping circuit, single-chip microcomputer detects the output signal that audio frequency amplifies the frequency discrimination shaping circuit, when detecting " busy tone " signal, when being on-hook signal, send the on-hook instruction to telephone interface circuit, the control telephone interface circuit transfers hook state to by off hook state, thereby realize after the dispatcher calls out the utility model, dispatcher gets final product on-hook, single-chip microcomputer sends on-hook commands for controlling telephone interface circuit when detecting on-hook signal and changes hook state over to by off hook state, realize tearing open automatically the bridge function, thereby release trunk road, need not dispatcher's monitoring users conversation constantly, judge the whether characteristics of on-hook of user.

For solving the problems of the technologies described above, a kind of call forwarding bridge that the utility model provides, it is characterized in that, comprise that telephone interface circuit, audio frequency amplify frequency discrimination shaping circuit and single-chip microcomputer, described telephone interface circuit is by telephone line dispatcher user port, telephone interface circuit also is connected with described single-chip microcomputer, and telephone interface circuit also is connected with the input of described audio frequency amplification frequency discrimination shaping circuit, and the output that described audio frequency amplifies the frequency discrimination shaping circuit connects described single-chip microcomputer.

Advantage of the present utility model is:

By adopting call forwarding bridge provided by the utility model, when outside line user incoming call dispatcher, to look for another outside line user's communication with dispatcher's session description earlier, the dispatcher forms Three-Way Calling after relaying changes outside line, the dispatcher calls out call forwarding bridge provided by the utility model again, at this moment, single-chip microcomputer receives the bell signal that telephone interface circuit is sent, thereby send the off-hook control command, control telephone interface circuit off-hook is to become the four directions conversation; Then, the dispatcher on-hook, two relaying outside lines and the utility model form Three-Way Calling, realize that outside line changes the outside line function; By behind two outside line end of conversations of transferring, the either or both on-hook is by single-chip microcomputer identification busy tone, according to the on-hook of busy tone control telephone interface circuit, to finish automatic clearing.Thereby, solved the dispatching telephone that takies that prior art exists when practical application, influence the dispatch control instruction and pass on, the dispatcher wants monitoring users conversation constantly, judges the whether problem of on-hook of user.

The utility model discloses a kind of call forwarding bridge, after the dispatcher calls out the utility model, dispatcher gets final product on-hook, when receiving on-hook signal, send the on-hook instruction by single-chip microcomputer, change hook state over to by off hook state with the control telephone interface circuit, realize tearing open automatically the bridge function, thereby the release trunk road need not dispatcher's monitoring users conversation constantly, judges whether on-hook of user.It is simple in structure, is easy to install, and working stability, result of use is good.

Description of drawings

Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is further described in detail.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a single-chip microcomputer workflow diagram in the utility model.

Wherein, 1-telephone wire, 2-bell signal, 3-dislodging machine control command, the output of 4-audio frequency.

Embodiment

At first, in conjunction with Fig. 1 each building block of the present utility model and connected mode are introduced: the utility model structural representation as shown in Figure 1, the utility model comprise that telephone interface circuit, audio frequency amplify frequency discrimination shaping circuit and single-chip microcomputer.Shown in Fig. 1, telephone interface circuit is passed through telephone line dispatcher user port, telephone interface circuit amplifies the frequency discrimination shaping circuit with single-chip microcomputer, audio frequency and is connected respectively, and audio frequency amplifies the output access single-chip microcomputer of frequency discrimination shaping circuit can finish connection of the present utility model.

Next, in conjunction with Fig. 1, Fig. 2, the course of work of the present utility model is described: when outside line user incoming call dispatcher, outside line user and dispatcher's session description will be looked for another outside line user's communication, the dispatcher forms Three-Way Calling after relaying changes outside line, the dispatcher calls out call forwarding bridge port provided by the utility model again, at this moment, telephone interface circuit inspection car is to bell signal, send bell signal to single-chip microcomputer, after single-chip microcomputer is received bell signal, send the off-hook control command to telephone interface circuit, the control telephone interface circuit changes (low-resistance) off hook state by high-impedance state, realizes the four directions conversation; Then, dispatcher's on-hook, two relaying outside lines and the utility model form Three-Way Calling, realize that outside line changes the outside line function; Single-chip microcomputer regularly detects the output signal that audio frequency amplifies the frequency discrimination shaping circuit, compares with cycle of " busy tone " signal, judges to be defined as " busy tone " by three complete periodic signals.After detecting " busy tone " signal, single-chip microcomputer is sent out the on-hook instruction to telephone interface circuit, and the control telephone interface circuit transfers high-impedance state to by off hook state (low resistive state) and finishes on-hook, realizes one time switching process.

Operation principle of the present utility model is:

The call forwarding bridge that the utility model provides utilizes aforesaid way to realize the automatic clearing function.The utility model takies an interior lines user port operation simulation phone, after the dispatcher transfers the utility model is being added MPTY, the Three-Way Calling that the back forms the utility model and two outside lines is withdrawed from the scheduling on-hook, either party outside line or both sides' on-hook behind the end of conversation, the utility model can detect busy tone and automatic hand-up, tears the outside line function open thereby finish.

It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. call forwarding bridge, it is characterized in that, comprise that telephone interface circuit, audio frequency amplify frequency discrimination shaping circuit and single-chip microcomputer, described telephone interface circuit is by telephone line dispatcher user port, telephone interface circuit also is connected with described single-chip microcomputer, telephone interface circuit also is connected with the input of described audio frequency amplification frequency discrimination shaping circuit, and the output that described audio frequency amplifies the frequency discrimination shaping circuit connects described single-chip microcomputer.