CN2575917Y - Loudspeaker box - Google Patents
Loudspeaker box Download PDFInfo
- Publication number
- CN2575917Y CN2575917Y CN 02272770 CN02272770U CN2575917Y CN 2575917 Y CN2575917 Y CN 2575917Y CN 02272770 CN02272770 CN 02272770 CN 02272770 U CN02272770 U CN 02272770U CN 2575917 Y CN2575917 Y CN 2575917Y
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- CN
- China
- Prior art keywords
- unit
- user
- ringing
- constant current
- relaying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a user/relay convertible interface circuit. The utility model comprises a user current feeding and ring feeding unit, a relay ringing current detection and constant current load unit, a 2/4 wire converting unit, a primary converting switch which is used for the conversion of telephone wires T, R between the T terminal and the R terminal of the user current feeding and ring feeding unit, the relay ringing current detection and constant current load unit, and a secondary converting switch which is used for the conversion of the T1 terminal and the T2 terminal of the 2/4 converting unit between the T1 terminal and the T2 terminal of the user current feeding and ring feeding unit and the relay ringing current detection and constant current load unit. The user/relay convertible interface circuit can be used for the user interface and relay interface. Any function of the user interface circuit and the relay interface circuit can be realized by the control for the primary and the secondary converting switches, so that the more compact structure, the lower cost, and the less functional redundancy of the communication equipment can be realized.
Description
Technical field
The utility model relates to the communication technology, more particularly, relates to a kind of switchable interface circuit of user/relaying that user interface function and trunk interface function can be provided by switching.
Background technology
The interface arrangement of prior art has two kinds usually, and a kind of can be used on user's plate, another kind can be used for relay plate, and is no matter any, all has only simple function, does not have a kind ofly can be used on the line module, can be used for the interface arrangement on the trunk module again.
The utility model content
The technical problems to be solved in the utility model is, the interface circuit on line module and the trunk module is concentrated on the circuit arrangement, makes it both can make user's plate interface, also can make trunk interface.
Technical problem of the present utility model is to solve like this, construct the switchable interface circuit of a kind of user/relaying, comprise: user's feed and feedback bell unit, the relaying ringing-current detects and the Constant Current Load unit, 2/4 line converting unit, also comprise and being used for telephone wire T, R is in described user's feed and feedback bell unit, the T of described relaying ringing-current detection and Constant Current Load unit, first diverter switch of switching between the R end is used for the T1 with described 2/4 converting unit, the T2 end is in described user's feed and feedback bell unit, the T1 of described relaying ringing-current detection and Constant Current Load unit, second diverter switch of switching between the T2 end.
In above-mentioned interface circuit, when described first diverter switch is connected to T, the R end of described user's feed and feedback bell unit with telephone wire T, R, described second diverter switch is held T1, the T2 end that is connected to described 2/4 converting unit with T1, the T2 of described user's feed and feedback bell unit, and this moment, circuit was a user interface circuit.
In above-mentioned interface circuit, when described first diverter switch is connected to T, the R end of described relaying ringing-current detection and Constant Current Load unit with telephone wire T, R, described second diverter switch detects described relaying ringing-current and T1, the T2 of Constant Current Load unit hold T1, the T2 end that is connected to described 2/4 converting unit, and this moment, circuit was the trunk interface circuit.
The switchable interface circuit of user/relaying that enforcement provides according to the utility model, both having needed can be used for user interface to need the occasion of trunk interface simultaneously, by the control of software to first, second diverter switch, any function in user interface circuit and the trunk interface circuit can be realized, thereby communication equipment more compact structure, lower cost and functional redundancy still less can be realized.
Description of drawings
Fig. 1 is the logic diagram of the switchable interface circuit of user/relaying that provides of the utility model;
Fig. 2 is the circuit theory diagrams of user's feed and feedback bell unit in the switchable interface circuit of user/relaying that provides of the utility model;
Fig. 3 is that the relaying ringing-current detects and the circuit theory diagrams of Constant Current Load unit in the switchable interface circuit of user/relaying that provides of the utility model;
Fig. 4 is the circuit theory diagrams of 2/4 line converting unit in the switchable interface circuit of user/relaying that provides of the utility model;
Embodiment
As shown in Figure 1, the functional block diagram of the switchable interface circuit of user/relaying that provides from the utility model as can be seen, this interface circuit comprises: user's feed and feedback bell unit 1, the relaying ringing-current detects and Constant Current Load unit 2,2/4 line converting unit 3, also comprise and being used for telephone wire T, R is in described user's feed and feedback bell unit 1, the T of detection of relaying ringing-current and Constant Current Load unit 2, first diverter switch of switching between the R end 4 is used for the T1 with 2/4 converting unit 4, the T2 end is in user's feed and feedback bell unit 1, the T1 of detection of relaying ringing-current and Constant Current Load unit 2, second diverter switch of switching between the T2 end 5.T, R are telephone line, when making user's interface circuit, T, R are connected to T, the R end of user's feed and feedback bell unit 1 by first diverter switch, simultaneously by second diverter switch 5, T1, the T2 end of user's feed and feedback bell unit 1 is connected to T1, the T2 end of 2/4 line converting unit 3, at this moment, detection of relaying ringing-current and Constant Current Load unit 2 are inoperative.Circuit of the present utility model is when being used for the trunk interface circuit, control that first diverter switch is connected to telephone wire T, R that the relaying ringing-current detects and during T, the R of Constant Current Load unit 2 end, control that second diverter switch detects the relaying ringing-current and T1, the T2 end of Constant Current Load unit 2 is connected to T1, the T2 end of 2/4 converting unit.
As Fig. 2, user's feed and feedback bell unit comprise symmetrically arranged two constant current unit (Q1, Q2 and Q3, Q4), off hook signal unit (U1) and feedback ringing-current unit (U4, U5).
As Fig. 3, the relaying ringing-current detects and the Constant Current Load unit comprises Constant Current Load unit (B1, Q1, Q2), dislodging machine signal element (OP3, Q3), reversed polarity detecting unit (OP2) and ringing-current detecting unit (OP1).
As Fig. 4, the amplifier unit (U2A) that 2/4 line converting unit comprises transformer and connects described transformer secondary output.
Claims (6)
1, the switchable interface circuit of a kind of user/relaying, it is characterized in that, comprise: user's feed and feedback bell unit, the detection of relaying ringing-current and Constant Current Load unit, 2/4 line converting unit, also comprise first diverter switch that is used for telephone wire T, R switching between T, the R end of described user's feed and feedback bell unit, the detection of described relaying ringing-current and Constant Current Load unit, be used for second diverter switch T1, T2 end switching between T1, the T2 end of described user's feed and feedback bell unit, the detection of described relaying ringing-current and Constant Current Load unit of described 2/4 converting unit.
2, interface circuit according to claim 1, it is characterized in that, when described first diverter switch was connected to T, the R end of described user's feed and feedback bell unit with telephone wire T, R, described second diverter switch was connected to T1, the T2 end of described user's feed and feedback bell unit at T1, the T2 end of described 2/4 converting unit.
3, interface circuit according to claim 1, it is characterized in that, when described first diverter switch was connected to T, the R end of described relaying ringing-current detection and Constant Current Load unit with telephone wire T, R, described second diverter switch detected described relaying ringing-current and T1, the T2 of Constant Current Load unit hold T1, the T2 end that is connected to described 2/4 converting unit.
4, according to claim 2,3 described interface circuits, it is characterized in that described relaying ringing-current detects and the Constant Current Load unit comprises Constant Current Load unit (B1, Q1, Q2), dislodging machine signal element (OP3, Q3), reversed polarity detecting unit (OP2) and ringing-current detecting unit (OP1).
5, according to claim 2,3 described interface circuits, it is characterized in that the amplifier unit (U2A) that described 2/4 converting unit comprises transformer and connects described transformer secondary output.
According to claim 2,3 described interface circuits, it is characterized in that 6, described user's feed and feedback bell unit comprise symmetrically arranged two constant current unit (Q1, Q2 and Q3, Q4), off hook signal unit (U1) and feedback ringing-current unit (U4, U5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272770 CN2575917Y (en) | 2002-08-22 | 2002-08-22 | Loudspeaker box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272770 CN2575917Y (en) | 2002-08-22 | 2002-08-22 | Loudspeaker box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2575917Y true CN2575917Y (en) | 2003-09-24 |
Family
ID=33737403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02272770 Expired - Fee Related CN2575917Y (en) | 2002-08-22 | 2002-08-22 | Loudspeaker box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2575917Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101163170B (en) * | 2006-10-12 | 2010-10-13 | 中兴通讯股份有限公司 | Feed condition and ring current testing apparatus |
-
2002
- 2002-08-22 CN CN 02272770 patent/CN2575917Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101163170B (en) * | 2006-10-12 | 2010-10-13 | 中兴通讯股份有限公司 | Feed condition and ring current testing apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |