CN2137844Y - Adapter for four telephones with common line - Google Patents
Adapter for four telephones with common line Download PDFInfo
- Publication number
- CN2137844Y CN2137844Y CN 92215808 CN92215808U CN2137844Y CN 2137844 Y CN2137844 Y CN 2137844Y CN 92215808 CN92215808 CN 92215808 CN 92215808 U CN92215808 U CN 92215808U CN 2137844 Y CN2137844 Y CN 2137844Y
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- Prior art keywords
- circuit
- extension set
- ringing
- pin
- power
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- 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.)
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Abstract
The utility model relates to an adapter for four telephones with common line, which is a small telephone switching device which has the advantages of reliable use, simple structure and low cost. The utility model adopts a photoelectric isolation circuit and a line automatic locking, driving, ringing and indicating circuit, the safety of callers and telephone networks are guaranteed, the performance of the adapter is enhanced, and the utility model can not affect telephone network load and also perform the function of secrecy for calling. When the power supply of the adapter is cut off, outside connections is still communicated with a duty telephone, and smooth line is guaranteed.
Description
The utility model relates to the manufacturing technology of call forwarding equipment
Deep development along with reform, opening, many a kind of babyphone interconnecting devicies that improve the telephone line utilization rate of customer requirements, use the interconnecting device of two kinds of phones at present, one is artificial adapter, and its call forwarding work is all operated by full-time telephone operator; Its two, be the automatic telephone interconnecting device, though it need not full-time operator, usually outside line can't insert the extension set of wanting automatically, many extension set while rings cause misconnection often.
The purpose of this utility model is to make simple, the compact conformation, with low cost, easy to use of a kind of circuit, does not influence the four call gate adapters that telephone network total load situation can improve the subscriber phone utilization rate again.
The utility model is to constitute like this: adopt photoelectric isolating circuit to make the utility model working power and phone network realize electric the isolation; Guarantee when transferring, to give outside line and " dummy load " that is equivalent to a telephone set load with the External Call holding circuit, outside line is interrupted, during as the External Call extension set, press corresponding button on the extension set transfer button machine of can putting down the telephone by the working telephone receiver, then seal the ringing circuit and the extension set startup indicating circuit of other extension set and this extension set of connection by self-locking and relay drive circuit, after extension set started, " dummy load " that discharge 300 Ω at once made the unlikely broken string of outside line.When extension set make good use of hang up after, enter state on duty again, can allow this moment all extension sets to use outside lines again.When the main frame personnel go out, adopt initialization circuit on duty to set working telephone.This adapter adopts external power source to power.
Advantage of the present utility model is:
1, adopts photoelectric isolating circuit that working power of the present utility model and outside line net are isolated all the time, guaranteed the safety of telephone user and phone network.
2, adopt main three secondary telephone sets, the usefulness of taking the lead earlier, but equal direct outward dialings, wherein one in usefulness, other each all cut off automatically, what both guaranteed to converse is secret, does not increase the load of phone network again.
3, during the passive cut-out of the utility model working power, main frame still is connected unimpeded with the outside line net, can not influence work.
4, the utility model circuit is simple, and is with low cost, and attaching is very convenient, easy to utilize with use.
Accompanying drawing is an example of the present utility model, in conjunction with the accompanying drawings the utility model is described in detail:
Fig. 1, the utility model schematic diagram;
Fig. 2, the utility model fundamental diagram;
Fig. 3, the utility model circuitry figure;
Fig. 4, photoelectric isolating circuit figure.
Among Fig. 1, extension set change over switch K
21, mains switch K
12, power supply indicator LED
13, button QA is eliminated in ring
44, ringing pilot lamp LED
25, one fens power ringing button QA
16, one extension set relay indicating light LED
37, two fens power ringing button QA
28, two extension set relay indicating light LED
49, three fens power ringing button QA
310, three extension set relay indicating light LED
511.
Fig. 2, this adapter adopts the external power source mode, and external power source offers each functional circuit in the adapter behind power circuit 16, and when external power source interrupted, the outside line phone network was still unimpeded with main frame.Outside line enters the call forwarding device through outer wiring connector 17, photoelectric isolating circuit 12, working power and outside line phone network kept apart make outside line phone network and working telephone initialization circuit 13 unimpeded, the circuit self-locking, driving, ring, indicating circuit 14 adopts the outside lines conversation to take the lead earlier with principle to main frame with certain extension set seals automatically or startup work, when main frame or the use outside line earlier of a certain extension set, three extension sets or main frame and in addition two extension sets be closed interruption with being communicated with of outside line, finish when using, the phone that is closed after the on-hook is communicated with recovery with outside line.External Call holding circuit 15 is in the requirement of main frame according to External Call, press certain extension set button, indicator light is glittering and on-hook the time, " dummy load " that connect one 300 Ω to outside line do not make outside line interrupt on the one hand, start on the other hand circuit self-locking, driving, ring, indicating circuit 14 connect certain etc. extension set and seal other telephone sets, when when this extension set begins to converse, External Call holding circuit 15 promptly removes automatically.This extension set is with after finishing on-hook, and this adapter is got back to state on duty again.When the personnel of machine hall go out, set an extension set as working telephone by working telephone initialization circuit 13, notify from a phone call according to External Call.
In the utility model circuit:
Self-locking, driving, ring, indicating circuit 14 are by IC
1, 1/2 IC
2, 1/2 IC
3, and peripheral cell constitute, wherein, resistance R
27, R
31, R
35, R
18With one fen power ringing button QA
16, two fens power ringing button QA
28, three fens power ringing button QA
310 form electronic switch manually boots element; D
26, D
29, D
30Form and pay the power ringing starting component; D
25, D
28, D
17, D
31For feeding back from locking element; R
25, R
29, R
33For paying organic electronic switch input terminal voltage sample resistance, capacitor C
7, C
8, C
9Form the absorption circuit,, prevent the electronic switch misoperation to eliminate the interference on the circuit; Resistance R
28, R
32, R
36With an extension set relay indicating light LED
37, two extension set relay indicating light LED
49, three extension set relay indicating light LED
511 form secondary machine work indication; Diode D
6, D
7, D
8Play buffer action.Diode D
26, D
29, D
32And resistance R
18Form switching and ring starting component, 1/2 IC
3Form ring electronics self-lock switch; Diode D
20, resistance R
14For reaction type from locking element; Capacitor C
11As anti-interference element, resistance R
7Be the ringing-current sampling resistor; Resistance D
9, D
16, capacitor C
12Be the back voltage lock stream of sampling, filter circuit; Triode Q
6, resistance R
15It is the ring element that automatically resets; Button QA is eliminated in ring
44, diode D
21, D
22Be the hand-reset element; Diode D
14, D
15Resistance R
5, R
6, capacitor C
4, ic chip
4, relay J
4Form the interrupted ringing circuit; Resistance R
7, ringing pilot lamp LED
25 are the ring indication.
External Call holding circuit 15 is by triode Q
7, relay J
5, resistance R
19, R
3(300 Ω " dummy load ") constitutes.
During the utility model work:
1, secondary machine is got an outside line:
Behind the off-hook, Q
4Output current is through J
1-1Normally-closed contact is by phone J
1-2Normally-closed contact and D
6, again at R
25 Last generation 8~10VDC voltage, then IC
212 pin are " 1 ", IC
211 pin are " 0 ", IC
23 pin are " 1 ", IC
211 pin are " 0 ", IC
23 pin are " 1 ", Q
1Conducting, J
1, J
0Adhesive.D
25, D
27Output " 1 ", about 20ms, J
0, J
1The contact displacement, secondary machine is connected trunk line, and the electric current that produces in trunk line is through IC
5Coupling is at R
8Last generation control voltage " 1 " is through isolating diode D
16And R
9Input IC
26 pin, IC at this moment
24 pin are " 0 ", IC
210 pin constant (" 1 ").In addition, D
25Output " 1 " back instantaneous feedback is with electronic switch self-locking, D
27Defeated " 1 " is after R
11, C
10After postponing 50ms, IC
28 pin become " 1 ", IC
210 pin still constant (" 1 ").At R
8The voltage of last generation also has one the tunnel to be input to IC
32 pin, then IC
33 pin are " 0 ", Q
5, Q
4End Q
4The no-output electric current.(annotate: reset condition refers to that main frame leads directly to outside line.J
0After the work, be cut off between main frame and the outside line).After the secondary machine on-hook, electric current is " 0 " in the interruption, then sensing IC
5Output and R
8On voltage be " 0 ", through R
9, R
10, C
6After postponing 3S, IC
24 pin are " 1 ".Since above-mentioned operating state, IC
28 pin become " 1 ", so IC
210 pin are reversed to " 0 ", i.e. IC
213 pin are " 0 ", and electronic switch discharges, IC
23 pin are " 0 ", Q
1End J
0, J
1Discharge, circuit working recovers reset condition.R
13, C
10After postponing 50ms, IC
210 pin are " 1 ", again through R
12, C
5Postpone 50ms, IC
213 pin are " 1 ", and circuit is a reset condition.
2, adapter is advanced in outside line
Because main frame passes through J
0Normally-closed contact leads directly to outside line, thereby has only the main frame ring.Its ringing current is through IC
5Be coupled to R
8Produce voltage, make IC
32 pin are " 1 ", IC
33 pin are " 0 ", Q
5End Q
4No-output, other secondary machine can not advance outside line.
3, main frame changes other secondary machine with the External Call phone
Press QA
1, the one tunnel makes IC
21 pin is " 0 ", IC
33 pin are " 1 ", other Principle of Process such as above-mentioned 1.Another road is through D
26Make IC
38 pin are " 0 ", IC
310 pin are " 1 ", pass through D
20IC
312 pin are " 1 ", electronic switch starting, Q
7Conducting, J
5Adhesive, R
3Insert trunk line, simultaneously IC
44 pin are " 1 ", IC
4Vibration, Q
8Interrupted conducting, J
4Discontinuous operation, secondary machine is heard interrupted ringing, the ringing pilot lamp (LED that periodically glimmers
2).
Behind secondary machine off-hook, its ringing current increases, and this amount is passed through R
17After the check, through D
9, R
16, C
12Filtering makes
6, C
12Filtering makes Q
6Conducting, IC
313 pin become " 0 ", IC
39,11 pin are " 1 ", IC
310,12 pin are " 0 ", Q
7End J
5Discharge R
3Reset, simultaneously, IC
44 pin are " 0 ", IC
4Failure of oscillation, Q
8End J
4Discharge LED
2Extinguish the direct normal talking of secondary machine and outside line.
5, manual ringing is eliminated
Press QA
4.IC313 pin are " 0 ", IC
311,9 pin are " 1 ", IC
310,12 pin are " 0 ", Q
7End, discharge IC
44 pin are " 0 ", IC
4Failure of oscillation, Q
8End J
4Discharge.While IC
213 pin are " 0 ", then IC
211,2 pin are " 1 ", IC
23 pin are " 0 ", Q
1End J
0, J
1Discharge, main frame is conversed with outside line once again, recovers reset condition.
Claims (1)
1, a kind of four party-line adapters comprise extension set change over switch K
2(1), mains switch K
1(2), power supply indicator LED
1(3), button QA is eliminated in ring
4(4), ringing pilot lamp LED
2(5), one fen power ringing button QA
1(5), one fen power ringing button QA
1(6), an extension set relay indicating light LED
3(7), two fens power ringing button QA
2(8), two extension set relay indicating light LED
4(9), three fens power ringing button QA
3(10), three extension set relay indicating light LED
5(11), photoelectric isolating circuit 12, working telephone initialization circuit (13), circuit self-locking, driving, ring, indicating circuit (14), External Call holding circuit (15), power circuit (16), outer wiring connector (17) is characterized in that by diode D
10, D
11, D
12, D
13, D
16, resistance R
8, R
9, R
10, capacitor C
61And ic chip
5, the photoelectric isolating circuit of formation (12) is kept apart adapter internal work power supply and outside line phone network; The self-locking of employing extension set pushbutton enable circuit, driving, ring, indicating circuit (14) and External Call maintenance phone (15) are eliminated the interference between each phone and are prevented the interruption of outside line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 92215808 CN2137844Y (en) | 1992-07-04 | 1992-07-04 | Adapter for four telephones with common line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 92215808 CN2137844Y (en) | 1992-07-04 | 1992-07-04 | Adapter for four telephones with common line |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2137844Y true CN2137844Y (en) | 1993-07-07 |
Family
ID=33764204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 92215808 Expired - Fee Related CN2137844Y (en) | 1992-07-04 | 1992-07-04 | Adapter for four telephones with common line |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2137844Y (en) |
-
1992
- 1992-07-04 CN CN 92215808 patent/CN2137844Y/en not_active Expired - Fee Related
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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 |