CN2681463Y - Remote loop back detection circuit - Google Patents
Remote loop back detection circuit Download PDFInfo
- Publication number
- CN2681463Y CN2681463Y CNU2004200195533U CN200420019553U CN2681463Y CN 2681463 Y CN2681463 Y CN 2681463Y CN U2004200195533 U CNU2004200195533 U CN U2004200195533U CN 200420019553 U CN200420019553 U CN 200420019553U CN 2681463 Y CN2681463 Y CN 2681463Y
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- 238000001514 detection method Methods 0.000 title abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims description 11
- 230000002457 bidirectional effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
Disclosed is a remote loop back detection circuit, comprising first and second relays respectively provided with at least a double-pole double-throw contact. Two public terminals of the first relay are respectively connected with seventh and eighth ports, for connecting with the sending terminal of a second external communication equipment. Being connected with two normally close terminals of the second relay, two normally open terminals of the first relay are respectively connected with fifth and sixth ports, for connecting with the receiving terminal of the second communication equipment. Being connected with two normally open terminals of the second relay, two normally close terminals of the first relay are respectively connected with * and * ports, for connecting with the receiving terminal of a first external communication equipment. Two public terminals of the second relay are respectively connected with tenth and * ports, for connecting with the sending terminal of the first communication equipment. Besides, after connected in series, two terminals of coils of two relays are connected with first and second ports, for connecting with an external control equipment. Under the supervising of the external control equipment, one or more communication circuits can be controlled at one time to realize the automatically bidirectional and loop back detecting state, which makes the detection accurate and rapid.
Description
Technical field
The utility model relates to a kind of telecommunication circuit, especially refers to a kind of loopback detection circuit to the telecommunication circuit.
Background technology
Tight day by day along with communication and people's daily life and production, in order to guarantee the reliable and unimpeded of its work, need carry out timing detection and maintenance to the communication port between the remote communication equipment, and being the staff of a side communication equipment therein, traditional detection method needs the operator on duty of prior notice opposite side communication equipment, then the operator on duty of opposite side communication equipment carries out loopback detection with cord with the circuit connection, though this also can reach the purpose of detection, but owing to adopt manual operation, be subjected to the restriction of operator's technical merit on the one hand, make detection speed slow, efficient is low, also makes mistakes easily simultaneously; Can only realize unidirectional loopback on the other hand, and once can only make a communication port be in detected state, therefore can't satisfy the development need of modern communications.For this reason, people design a kind of testing apparatus, as the patent No. is that a kind of device comes to this for 99252814.3 Chinese patent " communication port four-line loop testing device ", this device is made of instruction control unit and receiver, described receiver includes two relays that four wire loops return again, above-mentioned relay is double-point double-throw switch, wherein the communicate by letter receiving terminal of side of the common port of a relay and four lines links to each other, normally closed termination four line user side receiving terminals, Chang Kaiduan then connects level and impedance matching circuit; The common port of another relay and the four lines side transmitting terminal of communicating by letter links to each other, normally closed termination four line user side transmitting terminals, and Chang Kaiduan then connects level and impedance matching circuit.When adopting said apparatus to detect, though the operating personnel of user side need not to use cord again, can automatically detect, but above-mentioned testing apparatus still exist can only unidirectional loopback defective, the side of promptly communicating by letter still needs cord to carry out loopback detection, and all adopts hardware mode to carry out manual operation, once also can only detect a communication port, therefore, operating efficiency still awaits further raising.
Summary of the invention
Technical problem to be solved in the utility model is the present situation at prior art, and a kind of energy automatic bidirectional high efficiency remote loop-back testing circuit of loopback simultaneously is provided.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this remote loop-back testing circuit comprises first relay and second relay that has the dpdt double-pole double-throw (DPDT) contact respectively at least, it is characterized in that:
7. two common ports of described first relay are connected in respectively, 8. port, are used for linking to each other with the transmitting terminal of external second communication equipment;
5. two Chang Kaiduan of described first relay are respectively with after two normal-closed ends of described second relay link to each other, and are connected in respectively, 6. port again, are used for linking to each other with the receiving terminal of external second communication equipment;
Two normal-closed ends of described first relay with after two Chang Kaiduan of described second relay link to each other, are connected in , port respectively respectively again, are used for linking to each other with the receiving terminal of the first external communication equipment;
10. two common ports of described second relay are connected in respectively, the port, are used for linking to each other with the transmitting terminal of the first external communication equipment;
1. and described first relay coil and two ends after second relay coil is connected in series are connected in, 2. port, are used for linking to each other with external control appliance.
Described first relay and second relay can be separately fixed on the circuit board.
Can show that with one the luminous element of loopback indication is in parallel again behind the coil tandem of the coil of described first relay and second relay.
Described luminous element is good with light-emitting diode.
Compared with prior art, advantage of the present utility model is under the monitoring of external control appliance, can make the pass-through state of winning between communication equipment and the second communication equipment be converted to the automatic bidirectional detected state of loopback simultaneously apace, therefore, replaced detection method fully with the manual operation cord, make detection accurately, fast, thereby improved operating efficiency; Simultaneously relay is fixed on the circuit board, can makes the foregoing circuit plate that the polylith identical function is installed on the distributing frame, like this, control appliance can once be controlled many telecommunication circuits and realize that loopful returns or straight-through full state, has improved operating efficiency more widely; In addition, the luminous element of setting can observably point out staff's communication line to be in which kind of state, with handled easily.
Description of drawings
Fig. 1 is the telecommunication winding diagram of the utility model embodiment under pass-through state;
Fig. 2 is the line map of first, second relay contact under pass-through state on the circuit board;
Fig. 3 is the telecommunication winding diagram of the utility model embodiment under wrapped state;
Fig. 4 is the line map of first, second relay contact under wrapped state on the circuit board.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, this remote loop-back testing circuit is between the first communication equipment I and second communication equipment I I, it comprises first relay J 1, second relay J 2 that has the dpdt double-pole double-throw (DPDT) contact respectively, in the present embodiment, above-mentioned two relays all are fixed on the circuit board 1 of one 120 Ω, the front of this circuit board 1 has five and draws pin, and the back side is provided with 9 terminals; Two common port A1, A2 of above-mentioned first relay J 1 are respectively with 8., 7. port links to each other, promptly link to each other with the 8th, seven terminals of back of circuit board, two normal-closed end B1, B2 are respectively with after two Chang Kaiduan C3, C4 of second relay J 2 link to each other, be connected in , port more respectively, be that second and third of circuit board front draws on the pin, two Chang Kaiduan C1, C2 are then respectively with after two normal-closed end B3, B4 of second relay J 2 link to each other, 5. be connected in respectively again, 6. port, promptly be connected on the 5th, six terminals of back of circuit board; 10. two common port A3, A4 of second relay J 2 are connected in respectively, the port, and promptly being connected in the 6th, five of circuit board front draws on the pin; The coil W1 of described first relay J 1 is with after the coil W2 of second relay J 2 is connected in series, its positive terminal is connected in 2. on the terminal, promptly be connected on second terminal of back of circuit board, and negative pole end is connected in 1. on the terminal, be on the first terminal of back of circuit board, 3., 4. port and port (being that third and fourth terminal of back of circuit board and first draws pin) are earth terminal.
During installation, foregoing circuit plate 1 is installed on the distributing frame, 8., 7. port links to each other with the transmitting terminal T2 of second communication equipment I I to make, 6., 5. port links to each other with the receiving terminal R2 of second communication equipment I I, 10., the port then links to each other with the transmitting terminal T1 of the first communication equipment I respectively , port link to each other with the receiving terminal R1 of the first communication equipment I respectively; 1., 2. port links to each other with computer instruction end in the control room.According to above-mentioned principle, a plurality of circuit boards 1 can be installed on distributing frame, as long as the port on each circuit board 1 links to each other with corresponding each telecommunication circuit, 1., 2. port is connected in after the parallel connection successively respectively on the command end of computer and gets final product simultaneously with the on each circuit board.
In time know the state of telecommunication circuit in order to make the distributing frame place, place, front on this circuit board 1 also is equipped with the LED (being label 2) that shows the loopback indication, this LED and two ends after a resistance R 1 is connected in series be connected in respectively circuit board 1 back side the 1., 2. on the port.
During use, pass through computer monitor, send the high level control command, on the related circuit plate 1 is when 2. port is high level, elect 5V in the present embodiment as, at this moment, the first relay coil W1 and the second relay coil W2 all move, its normally opened contact is converted into normally off, at this moment, the signal that the transmitting terminal T1 of the first communication equipment I sends is delivered to the receiving terminal R1 of the first communication equipment I by the closing contact of second relay J 2, and the signal that the transmitting terminal T2 of second communication equipment I I sends is delivered to the receiving terminal R2 of second communication equipment I I by the closing contact of first relay J 1, i.e. the communication equipment of both sides automatic bidirectional loopback simultaneously separately, simultaneously, LED on the related circuit plate 1 is shinny, informs that staff's telecommunication circuit this moment is in the loopback detection state.
When detecting end, use computer monitor again, send the low level instruction, at this moment, on the related circuit plate 1 2. port is 0V, then the first relay coil W1 and the second relay coil W2 dead electricity, two relay contacts return reset condition, promptly the transmitting terminal T1 of the first equipment side I links to each other with the receiving terminal R2 of the second equipment side II, and the transmitting terminal T2 of the second equipment side II links to each other with the receiving terminal R2 of the first equipment side I, causes and realizes normal communications status between two long-distance communications equipments.
Computer can also make a plurality of circuit boards on the distributing frame 2. port be high level or low level, promptly once can make many telecommunication circuits realize automatic bidirectional loopback or pass-through state simultaneously, therefore, operating efficiency is very high, can make things convenient for regularly detecting automatically and maintaining between the long-distance communications equipment greatly.
Claims (4)
1, a kind of remote loop-back testing circuit comprises first relay (J1) and second relay (J2) that have the dpdt double-pole double-throw (DPDT) contact respectively at least, it is characterized in that:
7. two common ports (A1, A2) of described first relay (J1) are connected in respectively, 8. port, are used for linking to each other with the transmitting terminal (T2) of external second communication equipment (II);
Two normal-closed ends (B1, B2) of described first relay (J1) are respectively with after two Chang Kaiduan (C3, C4) of described second relay (J2) link to each other, be connected in , port more respectively, be used for linking to each other with the receiving terminal (R1) of external first communication equipment (I);
Two Chang Kaiduan (C1, C2) of described first relay (J1) are respectively with after two normally closed (B3, B4) of described second relay (J2) end links to each other, 5. be connected in respectively again, 6. port, be used for linking to each other with the receiving terminal (R2) of external second communication equipment (II);
10. two common ports of described second relay (J2) are connected in respectively, the port, are used for linking to each other with the transmitting terminal (T1) of external first communication equipment (I);
1. and described first relay coil (W1) and two ends after second relay coil (W2) is connected in series are connected in, 2. port, are used for linking to each other with external control appliance.
2, remote loop-back testing circuit according to claim 1 is characterized in that described first relay (J1) and second relay (J2) are separately fixed on the circuit board (1).
3, remote loop-back testing circuit according to claim 1 and 2, the coil (W1) that it is characterized in that described first relay with show that with one the luminous element of loopback indication is in parallel again after the coil (W2) of second relay is connected in series.
4, remote loop-back testing circuit according to claim 3 is characterized in that described luminous element is light-emitting diode (LED).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200195533U CN2681463Y (en) | 2004-01-15 | 2004-01-15 | Remote loop back detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200195533U CN2681463Y (en) | 2004-01-15 | 2004-01-15 | Remote loop back detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2681463Y true CN2681463Y (en) | 2005-02-23 |
Family
ID=34606655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200195533U Expired - Fee Related CN2681463Y (en) | 2004-01-15 | 2004-01-15 | Remote loop back detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2681463Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365961C (en) * | 2004-01-15 | 2008-01-30 | 宁波隆兴电信设备制造有限公司 | Remote surround detecting circuit |
-
2004
- 2004-01-15 CN CNU2004200195533U patent/CN2681463Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365961C (en) * | 2004-01-15 | 2008-01-30 | 宁波隆兴电信设备制造有限公司 | Remote surround detecting circuit |
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| 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 |