CN2255698Y - Simple telephone exchanging device - Google Patents
Simple telephone exchanging device Download PDFInfo
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- CN2255698Y CN2255698Y CN 95215565 CN95215565U CN2255698Y CN 2255698 Y CN2255698 Y CN 2255698Y CN 95215565 CN95215565 CN 95215565 CN 95215565 U CN95215565 U CN 95215565U CN 2255698 Y CN2255698 Y CN 2255698Y
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- circuit
- main
- bell sound
- internal
- switching device
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Abstract
The utility model relates to a simple telephone switching device, composed of a switching device and a connection box of an auxiliary telephone extension. Therefore, two party line telephone extensions have the functions of internal talk and external line direct dialing. The switching device is composed of a power supply circuit, an internal-external switching circuit, a transferring music waiting circuit, an external line ringing circuit, a main calling detecting controlling circuit and a main ring-tone circuit. The connection box is composed of an internal-external line isolation circuit, an auxiliary calling detecting controlling circuit and an auxiliary ring-tone circuit. The automatic switching of the internal line calling and talk is achieved through the calling detecting controlling circuits with the resistance change of the on-hook and off-hook of two telephones which are serially connected in the power supply circuit. The functions of external-line talk encryption and request transfer can also be realized.
Description
The utility model is a kind of simple and easy telephone switching device, is used to realize calling, conversation and switching between one tunnel outside line and two party line telephone subsets.
The utility model is on the basis of 1991 the 7.8th phases of " EE " magazine " home telephone " literary composition, and the development of the circuit such as " the new connections of three-terminal voltage-stabilizing IC constant-current source " of " music triode and application thereof " and " electronics newspaper " 27 phases in 1993 of reference " CYBERSPACE " 1991 the 3rd phases forms.Being somebody's turn to do " home telephone " literary composition, having proposed a kind of circuit structure that constitutes the simple type domestic phone, also is not a complete system.
Purpose of design of the present utility model provides a kind of complete simple and easy telephone switching device, but makes not only INCOM intercom but also can direct outward dialing of two party line telephone subsets.
The utility model is made up of interchanger and secondary extension terminal box.It comprises power supply circuits, internal and external line commutation circuit, transfer music files wait circuit, main bell sound and secondary bell sound circuit, it is characterized in that: outside line ringing circuit, main telemetry circuit and the power supply circuits called out are connected with the internal and external line commutation circuit respectively; Transfer music files waits for that circuit is connected with outer line end; The main telemetry circuit of calling out is connected with main bell sound circuit.The secondary telemetry circuit of calling out is connected with the internal and external line commutation circuit by the internal and external line buffer circuit, and the secondary telemetry circuit of calling out is connected with secondary bell sound circuit.
Characteristics of the present utility model are simple in structure.Can realize direct dialing in, but major-minor subscriber's extension station direct outward dialing still during power failure.The interior lines off-hook is called out automatically, need not dial.Main subscriber's extension (hereinafter to be referred as main frame) but outside line conversation maintain secrecy and seek the opinion of transfer to secondary subscriber's extension (hereinafter to be referred as secondary machine), and outside line music latency function is arranged.When work in interior lines, outside line still can be called out main user.Main user can toll breakdown, the intrusion outside line, also can realize Three-Way Calling.
Fig. 1 (a) is an interchanger block diagram of the present utility model, and Fig. 2 (b) is the terminal box block diagram.
Fig. 2 is a circuit diagram of the present utility model.
Fig. 3 is application mode figure of the present utility model.
Below in conjunction with accompanying drawing and specific implementation the utility model is elaborated:
Fig. 2 (a) is an interchanger circuit diagram of the present utility model.The internal and external line commutation circuit is by main subscriber's extension selector switch S
M(hereinafter to be referred as the main separation switch) and secondary subscriber's extension selector switch S
M(selecting switch hereinafter to be referred as pair) formed.Main frame is connected in the main separation switch S
MSwitches set S
M-1Main frame M
1End is after switching, respectively with outside line L
+The output N of end and power supply circuits
+End connects, and realizes the internal and external line conversion of main frame.Interior lines are connected in pair and select switch S
6Interior lines X-end, after switching, respectively with outside line L
+The output N of end and power supply circuits
-End connects, and realizes the internal and external line conversion of secondary machine.
Power supply circuits are by power transformer T
1, diode VD
1～VD
4, capacitor C
1～C
3With circuit of three-terminal voltage-stabilizing integrated IC
1The direct current regulation circuit of forming, resistance R
1, capacitor C
4, triode V
1With circuit of three-terminal voltage-stabilizing integrated IC
2The constant-current source that constitutes is formed.Capacitor C
4The speech alternating current path is provided.The output N of power supply circuits
+End; Respectively with the main voltage stabilizing didoe VD that calls out telemetry circuit
7Negative electrode and through the main separation switch S
MSwitches set S
M-1After the switching, with main frame M
1End connects.
Transfer music files waits for that circuit is to shift maintained switch S by External Call
H(hereinafter to be referred as transfer switch), transfer indication light-emitting diode VD
5, resistance R
2, capacitor C
5, voltage stabilizing didoe VD
6With music integrated circuit IC
4Form.Transfer switch S
HAn end and outside line L
+End connects, and transfer music files is waited for the G point and the outside line L of circuit
-End connects, and the transfer music files when realizing External Call pair machine is waited for.
The outside line ringing circuit is by resistance R
9, capacitor C
6And C
7, diode VD
14～VD
17, ring indication light-emitting diode VD
18, voltage stabilizing didoe VD
19And pronunciation circuit (1) is formed.Resistance R
9With internal and external line commutation circuit main separation switch S
MSwitches set S
M-2N
REnd connects, diode VD
14Anode and diode VD
17Negative electrode and outside line L-end is connected, realize the External Call ring when work in interior lines.Pronunciation circuit (1) can be phone ringing integrated circuit or direct current news Chinese percussion instrument.
Main calling telemetry circuit is by voltage stabilizing didoe VD
7, resistance R
3～R
5, triode V
2Form.Voltage stabilizing didoe VD
7Negative electrode and the output N of power supply circuits
+End connects, triode V
2Emitter G point and main frame M
2End connects, resistance R
5Be connected with the negative pole a point of main bell sound circuit, realize the observing and controlling that secondary machine is called out main frame.
Main bell sound circuit is by ring indication light-emitting diode VD
8, diode VD
9, music integrated circuit IC
3, triode V
3With loud speaker BL
1Form.The anodal b point of main bell sound circuit and the main voltage stabilizing didoe VD that calls out telemetry circuit
7Anode connect the resistance R of its negative pole a point and main calling telemetry circuit
5Connect.The operating current of main bell sound circuit is less than or equal to the off-hook electric current of secondary machine.
Fig. 2 (b) is the terminal box circuit diagram.The internal and external line buffer circuit is diode VD
10Diode VD
10Negative electrode and the secondary voltage stabilizing didoe VD that calls out telemetry circuit
11Negative electrode connect diode VD
10Anode and interior lines X
+End and secondary machine S
1End connects, and realizes the isolation of internal and external line.
Secondary calling telemetry circuit is by voltage stabilizing didoe VD
11, resistance R
6～R
8With triode V
4Form.Voltage stabilizing didoe VD
11Negative electrode and buffer circuit diode VD
10Negative electrode connect triode V
4Emitter E point and interior lines X
-End and secondary machine S
2End connects, resistance R
8Be connected with the negative pole c point of secondary bell sound circuit, realize calling observing and controlling secondary machine.
Secondary bell sound circuit and main bell sound circuit are identical.
Outside line L
-End, main frame M
2End and interior lines X
+End links together, and is connected with the midpoint potential G point of this device.
Sketch operation principle of the present utility model below in conjunction with use:
Generally; The main separation switch S
MSwitches set S
M-1Place power supply output N
+End, switches set S
M-2Place the N of outside line ringing circuit
REnd; Pair is selected switch S
SPlace power supply output N
-End; Transfer switch S
HPlace off-state.At this moment main frame and secondary machine are serially connected with in the current supply circuit, and every telephone set terminal voltage equals 1/2nd of supply power voltage.Because voltage stabilizing didoe VD
7And VD
11The voltage at two ends all is lower than their puncture voltage, so main bell sound and secondary bell sound circuit be sounding not.
When secondary user off-hook call main frame, secondary machine is equivalent to the resistance of a hundreds of ohm, and the voltage at secondary machine two ends reduces greatly, and the voltage at main frame two ends rises near supply power voltage, makes voltage stabilizing didoe VD
7Puncture, its reverse current sharply increases.So main triode V that calls out telemetry circuit
2Conducting, music integrated circuit IC
3Get electric work, loud speaker BL
1Sounding.If main user's off-hook, then supply power voltage is divided equally by two telephone sets once more, triode V
2End loud speaker BL
1Stop sounding, both sides enter talking state.
When External Call, the outside line ringing current is through diode VD
14～VD
17After the rectification, pronunciation circuit (1) gets electric work, diode VD
18Luminous, pronunciation circuit (1) sends the call bell sound.Main user can be with the main separation switch S
MPlace outside line L
+End can be conversed with outside line behind the off-hook.If External Call is secondary machine, main user can be with the transfer switch closure, diode VD
5Luminous, music integrated circuit IC
4Get electric work, to outside line L
+End outputting music signal, outside line L
+End is in the music wait state.At this moment main user is again with the main separation switch S
MPlace power supply output N
+End, because main frame off-hook, the voltage at secondary machine two ends rises near supply power voltage, makes voltage stabilizing didoe VD
11Puncture triode V
4Conducting, secondary bell sound circuit gets electric work, sends the call bell sound.Behind the secondary user off-hook, the call bell sound stops, and enters talking state.
If secondary user agrees and the outside line conversation, main user can select switch S with pair
SPlace outside line L
+End.Again with transfer switch S
HReset light-emitting diode VD
5Extinguish, secondary user can converse with outside line.Because the outside line feed is anti-phase being added on the interior lines, interior lines X
+End is for bearing interior lines X
-End is being for just, diode VD
10End, secondary calling telemetry circuit and outside line are isolated.
Fig. 3 (a) is the application mode of two telephone sets.
Fig. 3 (b) is the application mode of three telephone sets, and this kind mode can be simplified transfer operation.
Claims (6)
1. simple and easy telephone switching device, it is made up of interchanger and secondary extension terminal box.It comprises power supply circuits, internal and external line commutation circuit, transfer music files wait circuit, main bell sound and secondary bell sound circuit, it is characterized in that:
A: outside line ringing circuit, main telemetry circuit and the power supply circuits called out are connected with the internal and external line commutation circuit respectively; Transfer music files waits for that circuit is connected with outer line end; The main telemetry circuit of calling out is connected with main bell sound circuit.
B: the secondary telemetry circuit of calling out is connected with the internal and external line commutation circuit by the internal and external line buffer circuit, and the secondary telemetry circuit of calling out is connected with secondary bell sound circuit.
2. simple and easy telephone switching device according to claim 1 is characterized in that the resistance R in the outside line ringing circuit
9With internal and external line commutation circuit main separation switch S
MSwitches set S
M-2N
REnd connects, diode VD
14Anode and diode VD
17Negative electrode and outside line L-end is connected, pronunciation circuit (1) can be that phone ringing integrated circuit or direct current are interrogated Chinese percussion instrument.
3. simple and easy telephone switching device according to claim 1 is characterized in that internal and external line buffer circuit diode VD
10Negative electrode and the secondary voltage stabilizing didoe VD that calls out telemetry circuit
11Negative electrode connect diode VD
10Anode and interior lines X
+End and secondary machine S
1End connects.
4. simple and easy telephone switching device according to claim 1 is characterized in that the main voltage stabilizing didoe VD that calls out in the telemetry circuit
7Negative electrode and the output N of power supply circuits
+End connects, triode V
2Emitter G point and main frame M
2End connects, resistance R
5Be connected with the negative pole a point of main bell sound circuit.
5. simple and easy telephone switching device according to claim 1 is characterized in that the secondary voltage stabilizing didoe VD that calls out in the telemetry circuit
11Negative electrode and buffer circuit diode VD
10Negative electrode connect triode V
4Emitter E point and interior lines X
-End and secondary machine S
2End connects, resistance R
8Be connected with the negative pole c point of secondary bell sound circuit.
6. simple and easy telephone switching device according to claim 1 is characterized in that the anodal b point of main bell sound circuit and the voltage stabilizing didoe VD of main calling telemetry circuit
7Anode connect the resistance R of its negative pole a point and main calling telemetry circuit
5Connect.The operating current of main bell sound circuit is less than or equal to the off-hook electric current of secondary machine.Main bell sound circuit and secondary bell sound circuit are identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215565 CN2255698Y (en) | 1995-06-22 | 1995-06-22 | Simple telephone exchanging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215565 CN2255698Y (en) | 1995-06-22 | 1995-06-22 | Simple telephone exchanging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2255698Y true CN2255698Y (en) | 1997-06-04 |
Family
ID=33864885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95215565 Expired - Fee Related CN2255698Y (en) | 1995-06-22 | 1995-06-22 | Simple telephone exchanging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2255698Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829263B (en) * | 2005-03-04 | 2010-08-18 | 阿尔卡特公司 | Method for providing features to the user of a telephone, a central unit and a telecommunication system therefor |
-
1995
- 1995-06-22 CN CN 95215565 patent/CN2255698Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829263B (en) * | 2005-03-04 | 2010-08-18 | 阿尔卡特公司 | Method for providing features to the user of a telephone, a central unit and a telecommunication system therefor |
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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 |