CN104202449A - Telephone line extender and telephone - Google Patents
Telephone line extender and telephone Download PDFInfo
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- CN104202449A CN104202449A CN201410490000.4A CN201410490000A CN104202449A CN 104202449 A CN104202449 A CN 104202449A CN 201410490000 A CN201410490000 A CN 201410490000A CN 104202449 A CN104202449 A CN 104202449A
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- interface
- circuit
- telephone
- telephone line
- line extender
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Abstract
The invention discloses a telephone line extender and a telephone. The telephone line extender comprises a first interface, a second interface, a power supply, a detecting unit, a processing unit, a relay switching circuit and a feedback current compensation circuit (such as a constant current source circuit). The relay switching circuit is connected between the first interface and the second interface. The feedback current compensation circuit is connected with the relay switching circuit. The power supply powers the processing unit and the feedback current compensation circuit. When the detecting units detects that calling occurs currently, the detecting unit judges whether the feedback current of the first interface is a set value or not and transmits the judging result to the processing unit, if the feedback current is lower than the set value, the processing unit controls the relay switching circuit to switch the first interface to be connected to the feedback current compensation circuit, and accordingly the first interface, the feedback current compensation circuit, the relay switching circuit and the second interface are sequentially connected, the second interface keeps the feedback current to be the set value, and stable and normal transmission of telephone signals is guaranteed.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of telephone line extender and telephone set.
Background technology
Along with the continuous propelling of new countryside construction, and community of factory is the developing rapidly of rural area, and fixed-line phone service (containing ADSL) has become a capital construction of Rural Areas at Present, and universal gradually in rural area.But thing followed problem is, some are the remote districts away from from urban district, from telephone repeater station also away from, distance 5～6KM conventionally, more than even exceeding 10KM.Due to distant, the telephone signal quality that is therefore passed to user is lower, as little in jitter, In Call etc.According to conventional solution, or telecom operators increase relay station, or strengthen the diameter of telephone wire, although can address the above problem with upper type, but can improve greatly communications cost, especially, in the more sparse place of population, be difficult to especially regain input cost.
Summary of the invention
Main purpose of the present invention is to provide a kind of telephone line extender and telephone set, is intended to reduce communications cost from far-off regions, improves communication quality from far-off regions.
To achieve these objectives, the present invention proposes a kind of telephone line extender, comprise first interface, the second interface, power supply, detecting unit, processing unit, relay swicthing circuit and supply current compensating circuit, described relay swicthing circuit is connected between described first interface and the second interface, described supply current compensating circuit connects described relay swicthing circuit, and described power supply is described processing unit and the power supply of supply current compensating circuit;
Described detecting unit detects current in the time calling, and judges whether the supply current of described first interface is set point, and judged result is sent to described processing unit;
If described judged result is that described supply current is lower than described set point, described processing unit is controlled described relay swicthing circuit described first interface is switched and is connected to described supply current compensating circuit, so that described first interface, supply current compensating circuit, relay swicthing circuit and the second interface are connected successively.
Preferably, described supply current compensating circuit is a constant-current source circuit.
Preferably, described supply current compensating circuit comprises a signal amplification circuit and a constant-current source circuit, described constant-current source circuit one end connects described power supply, the other end connects described signal amplification circuit, described signal amplification circuit connects described relay swicthing circuit, and described relay swicthing circuit switches described first interface to be connected to described signal amplification circuit.
Preferably, described power supply is portable power source, battery or utility network.
Preferably, described telephone line extender also comprises a status indicator lamp, status indicator lamp work described in described processing unit control.
Preferably, described telephone line extender is built in telephone set, and described first interface connects telephone network, and described the second interface connects the communication module of telephone set.
Preferably, described first interface connects telephone network, and described the second interface connects the communication port of telephone set.
The present invention proposes a kind of telephone set simultaneously, comprise a communication module and a telephone line extender, described telephone line extender comprises first interface, the second interface, power supply, detecting unit, processing unit, relay swicthing circuit and supply current compensating circuit, described relay swicthing circuit is connected between described first interface and the second interface, described supply current compensating circuit connects described relay swicthing circuit, and described power supply is described processing unit and the power supply of supply current compensating circuit; Described detecting unit detects current in the time calling, and judges whether the supply current of described first interface is set point, and judged result is sent to described processing unit; If described judged result is that described supply current is lower than described set point, described processing unit is controlled described relay swicthing circuit described first interface is switched and is connected to described supply current compensating circuit, so that described first interface, supply current compensating circuit, relay swicthing circuit and the second interface are connected successively.And the first interface of described telephone line extender connects telephone network, and the second interface connects described communication module; Or the first interface of described telephone line extender connects described communication module, the second interface connects telephone network.
A kind of telephone line extender provided by the present invention, detect by the supply current to first interface, in the time detecting that supply current is less than set point, the second interface is carried out to supply current compensation, make the second interface remain that supply current is set point, ensured stable, the normal transmission of telephone signal.Meanwhile, also telephone signal is amplified to processing, strengthened telephone signal, improved In Call.Telephone line extender circuit of the present invention is simple, with low cost, easy for installation, has reduced communications cost from far-off regions, has improved communication quality from far-off regions.
Brief description of the drawings
Fig. 1 is the circuit connection diagram of telephone line extender the first embodiment of the present invention;
Fig. 2 is the circuit diagram of relay swicthing circuit in the embodiment of the present invention;
Fig. 3 is the circuit diagram of constant-current source circuit in the embodiment of the present invention;
Fig. 4 is the circuit connection diagram of telephone line extender the second embodiment of the present invention;
Fig. 5 is the circuit diagram of signal amplification circuit in the embodiment of the present invention.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, telephone line extender one embodiment of the present invention is proposed, described telephone line extender comprises first interface, the second interface, power supply, detecting unit, processing unit, relay swicthing circuit and supply current compensating circuit, and the supply current compensating circuit in the present embodiment is a constant-current source circuit.Power supply can be portable power source, battery or utility network, in the time being utility network, need be by transducer by lower voltage, as be reduced to 5V, 9V or 12V.Processing unit can be that model is the microprocessor of HT46R01.
Relay swicthing circuit is connected between first interface and the second interface, and constant-current source circuit connects relay swicthing circuit, and power supply connects respectively processing unit and constant-current source circuit, is processing unit and constant-current source circuit power supply.The current stabilization that constant-current source circuit provides power supply is a constant scope, as 23-28mA.Wherein, as shown in Figure 2, the circuit diagram of constant-current source circuit as shown in Figure 3 for the circuit diagram of relay swicthing circuit.
Whether detecting unit is being called for detection of current, and whether as being brought up and being judged current whether calling by the microphone of detection telephone set, if detect, microphone is raised, and assert current calling.Detect currently in the time calling, judge whether the supply current of first interface is set point, this set point can be 23-28mA, preferably 23mA, and judged result is sent to processing unit.
Processing unit is analyzed judged result, if judged result is that supply current is lower than set point, processing unit is controlled relay swicthing circuit first interface is switched and is connected to constant-current source circuit, so that first interface, constant-current source circuit, relay swicthing circuit and the second interface are connected successively.Thereby carry out supply current compensation by constant-current source circuit, make the second interface remain that supply current is set point (as 23mA), ensured stable, the normal transmission of telephone signal.
Further, telephone line extender also comprises a status indicator lamp, and this status indicator lamp connects processing unit, this status indicator lamp work of processing unit control.As, in the time of power supply normal power supply, processing unit state of a control indicator light Chang Liang; In the time that telephone line extender is being worked, state of a control indicator light flicker of processing unit; In the time that telephone line extender breaks down, processing unit state of a control indicator light sends ruddiness or flicker.Thereby user can grasp the operating state of telephone line extender immediately.
Referring to Fig. 4, telephone line extender the second embodiment of the present invention is proposed, in the present embodiment, supply current compensating circuit comprises a signal amplification circuit and constant-current source circuit, wherein constant-current source circuit one end connects power supply, the other end connects signal amplification circuit, signal amplification circuit connects relay swicthing circuit, and wherein the circuit diagram of signal amplification circuit as shown in Figure 5.When the supply current of first interface is during lower than set point, processing unit control relay swicthing circuit switches first interface to be connected to signal amplification circuit.Thereby telephone signal is amplified processing by signal amplification circuit, constant-current source circuit carries out supply current compensation, has both strengthened telephone signal, has improved In Call, has ensured again stable, the normal transmission of telephone signal.
Telephone line extender of the present invention can be independent of telephone set (landline telephone) and exist, now telephone line extender is connected between telephone network and telephone set, be that its first interface connects telephone network (as connected telephone socket), the second interface connects the communication port of telephone set; Or first interface connects the communication port of telephone set, the second interface connects telephone network.
Alternatively, telephone line extender also can be built in telephone set, becomes a part for telephone set, and now its first interface connects telephone network, and the second interface connects the communication module of telephone set; Wherein first interface can connect telephone network by the communication port of telephone set, or first interface and communication port multiplexing (being that communication port is the first interface of telephone line extender), direct connection telephone network.Or first interface connects the communication module of telephone set, the second interface connects telephone network; Wherein the second interface can connect telephone network by the communication port of telephone set, or the second interface and communication port multiplexing (being that communication port is the second interface of telephone line extender), direct connection telephone network.
First interface in the present invention and the second interface are the coffret (input interface or output interface) of signal of communication.
Supply current compensating circuit, except the aforementioned two preferred two schemes of embodiment institute, can also be other scheme.
Thereby, telephone line extender of the present invention, detect by the supply current to first interface, in the time detecting that supply current is less than set point, the second interface is carried out to supply current compensation, make the second interface remain that supply current is set point, ensured stable, the normal transmission of telephone signal.Meanwhile, also telephone signal is amplified to processing, strengthened telephone signal, improved In Call.Telephone line extender circuit of the present invention is simple, with low cost, easy for installation, has reduced communications cost from far-off regions, has improved communication quality from far-off regions.
The present invention proposes a kind of telephone set simultaneously, described telephone set comprises a communication module and telephone line extender, this telephone line extender comprises first interface, the second interface, power supply, detecting unit, processing unit, relay swicthing circuit and supply current compensating circuit, relay swicthing circuit is connected between first interface and the second interface, supply current compensating circuit connects relay swicthing circuit, and power supply is processing unit and the power supply of supply current compensating circuit; Detecting unit detects current in the time calling, and judges whether the supply current of first interface is set point, and judged result is sent to processing unit; If judged result be supply current lower than set point, processing unit control relay swicthing circuit by first interface switch be connected to supply current compensating circuit so that first interface, supply current compensating circuit, relay swicthing circuit and the second interface are connected successively.And the first interface of telephone line extender connects telephone network, the second interface connects communication module; Or the first interface of telephone line extender connects communication module, the second interface connects telephone network.Telephone line extender described in the present embodiment is the related telephone line extender of above-described embodiment in the present invention, does not repeat them here.
Should be understood that; these are only the preferred embodiments of the present invention; can not therefore limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a telephone line extender, it is characterized in that, comprise first interface, the second interface, power supply, detecting unit, processing unit, relay swicthing circuit and supply current compensating circuit, described relay swicthing circuit is connected between described first interface and the second interface, described supply current compensating circuit connects described relay swicthing circuit, and described power supply is described processing unit and the power supply of supply current compensating circuit;
Described detecting unit detects current in the time calling, and judges whether the supply current of described first interface is set point, and judged result is sent to described processing unit;
If described judged result is that described supply current is lower than described set point, described processing unit is controlled described relay swicthing circuit described first interface is switched and is connected to described supply current compensating circuit, so that described first interface, supply current compensating circuit, relay swicthing circuit and the second interface are connected successively.
2. telephone line extender according to claim 1, is characterized in that, described supply current compensating circuit is a constant-current source circuit.
3. telephone line extender according to claim 1, it is characterized in that, described supply current compensating circuit comprises a signal amplification circuit and a constant-current source circuit, described constant-current source circuit one end connects described power supply, the other end connects described signal amplification circuit, described signal amplification circuit connects described relay swicthing circuit, and described relay swicthing circuit switches described first interface to be connected to described signal amplification circuit.
4. according to the telephone line extender described in claim 1-3 any one, it is characterized in that, described power supply is portable power source, battery or utility network.
5. according to the telephone line extender described in claim 1-3 any one, it is characterized in that, described telephone line extender also comprises a status indicator lamp, status indicator lamp work described in described processing unit control.
6. according to the telephone line extender described in claim 1-3 any one, it is characterized in that, described telephone line extender is built in telephone set, and described first interface connects telephone network, and described the second interface connects the communication module of telephone set.
7. according to the telephone line extender described in claim 1-3 any one, it is characterized in that, described first interface connects telephone network, and described the second interface connects the communication port of telephone set.
8. a telephone set, comprise a communication module, it is characterized in that, also comprise a telephone line extender, described telephone line extender is the telephone line extender as described in claim 1-5 any one, and the first interface of described telephone line extender connects telephone network, and the second interface connects described communication module; Or the first interface of described telephone line extender connects described communication module, the second interface connects telephone network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490000.4A CN104202449A (en) | 2014-09-23 | 2014-09-23 | Telephone line extender and telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490000.4A CN104202449A (en) | 2014-09-23 | 2014-09-23 | Telephone line extender and telephone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104202449A true CN104202449A (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410490000.4A Pending CN104202449A (en) | 2014-09-23 | 2014-09-23 | Telephone line extender and telephone |
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| CN (1) | CN104202449A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171003A (en) * | 1996-06-26 | 1998-01-21 | 三星电子株式会社 | Apparatus and method of compensating signal attenuation on telephone line |
| CN101053151A (en) * | 2004-11-29 | 2007-10-10 | 株式会社村田制作所 | Semiconductor device and power amplifier |
| US20110190028A1 (en) * | 2010-02-01 | 2011-08-04 | Intersil Americas Inc. | Power Amplifier Linearization Feedback Methods and Systems |
| CN203734625U (en) * | 2013-12-30 | 2014-07-23 | 苏州矩阵光电有限公司 | Communication signal compensator |
-
2014
- 2014-09-23 CN CN201410490000.4A patent/CN104202449A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171003A (en) * | 1996-06-26 | 1998-01-21 | 三星电子株式会社 | Apparatus and method of compensating signal attenuation on telephone line |
| CN101053151A (en) * | 2004-11-29 | 2007-10-10 | 株式会社村田制作所 | Semiconductor device and power amplifier |
| US20110190028A1 (en) * | 2010-02-01 | 2011-08-04 | Intersil Americas Inc. | Power Amplifier Linearization Feedback Methods and Systems |
| CN203734625U (en) * | 2013-12-30 | 2014-07-23 | 苏州矩阵光电有限公司 | Communication signal compensator |
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Application publication date: 20141210 |