CN2183057Y - Device for bell calling a subscriber - Google Patents
Device for bell calling a subscriber Download PDFInfo
- Publication number
- CN2183057Y CN2183057Y CN 93242105 CN93242105U CN2183057Y CN 2183057 Y CN2183057 Y CN 2183057Y CN 93242105 CN93242105 CN 93242105 CN 93242105 U CN93242105 U CN 93242105U CN 2183057 Y CN2183057 Y CN 2183057Y
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- CN
- China
- Prior art keywords
- ringing
- circuit
- current
- tie point
- user interface
- 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 - Lifetime
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- Devices For Supply Of Signal Current (AREA)
Abstract
The utility model relates to a ringing current stop device 6 for user interfaces, which is formed by adding a photoelectric coupler PI among a circulating current and ringing current electric power supply circuit 1, a ringing current driving circuit 4 and a constant current circuit 5, and R2 and R3 are respectively composed of a resistance capacitance network. The device can cause automatic ringing current stop to be realized, and can cause input and output impedances of user ends to be in the characteristics of complex. The device has the advantages of compact structure, low productive cost and simple large scale production.
Description
The utility model belongs to field of telephone communication, particularly program control automatic switch-board and key system and subscriber line interface ringing-current cutting device.
User interface ringing-current cutting device is the critical function of user interface normally.When being the phone off-hook, ringing-current should in time block automatically.If do not have this function, just can only judge in the ring intermittent phase by the automatic switch-board Control Software.If phone in the ring process off-hook takes place, make computer be difficult to accurately judge whether off-hook owing in the local loop very big interchange ringing-current is arranged this moment, can only wait for that ring is intermittently come just can accurately judge, and then interrupt ringing-current.Therefore, as if off-hook in the ring process, ringing-current can bring ear-piercing ringing-current noise to the user, and telephone set is damaged.The new MH88612 that releases of the MH88500 that the Canadian Mitel Corp that is used widely in the space switching machine at present produces and the said firm does not all have this critical function.In addition, existing all better simply its inputs of monolithic user interface circuit, output impedance are generally pure resistance, generally do not have the complex impedance characteristic, and the complex number type line impedance that can not bring remote subscriber's loop is effectively mated.
The purpose of this utility model, be exactly on the basis of existing MH88500 and MH88612 improvement project, adopt one of thick film element manufacturing can make the automatic intercepted user interface ringing-current cutting device of phone ringing-current when the ring off-hook, and can make user interface input, output impedance become complex impedance on request.
Fig. 1 is the circuit theory diagrams of the utility model user interface ringing-current cutting device and port complex impedance network.Wherein the frame of broken lines of RT representative partly is the ringing-current cut off circuit.Z
2, Z
3Be port complex impedance network.
Fig. 2 is applied in frame principle figure in the space switching machine user interface circuit for the utility model.
Fig. 3 is applied in frame principle figure in the time division switch user interface circuit for the utility model.
Fig. 4 is applied in circuit theory diagrams in the space switching machine user interface circuit for the utility model.
Fig. 5 is applied in circuit theory diagrams in the space switching machine user interface circuit for the utility model.
User interface ringing-current cutting device comprises circulation and ringing-current feed circuit 1, bi-directional speech circuit 2(or 2/4 line change-over circuit 2), loop detection circuit 3, ringing-current drive circuit 4 and constant-current circuit 5.It is characterized in that: between circulation and ringing-current feed circuit 1, ringing-current drive circuit 4 and constant-current circuit 5, increase a user interface ringing-current cutting device 6.Its formation comprises photoelectrical coupler PI, diode D, capacitor C
3And resistance R
8, R
80Practical circuit as shown in Figure 1.The tie point of light-emitting diode anode and diode D negative terminal constitutes the 1st end and and the R of ringing-current cut off circuit RT in the photoelectrical coupler PI
3, capacitor C the tie point of anode on the RF terminal link to each other, in the PI the 2nd end of light-emitting diode negative terminal and the tie point formation RT of diode D anode and with triode Q
5Collector electrode links to each other.The base stage of triode serial connection C in the PI
3Be connected with ground, emitter is connected with-5 volts, collector series connection R
30Constitute the 3rd end and and the Q of RT
3The same R of base stage
26Tie point link to each other this collector electrode and R
30Tie point serial connection R
8Be connected to ground.
Light-emitting diode forward among the photoelectrical coupler PI is serially connected in Q
5In the constant current path of collector electrode, the loop current state can be coupled in the PI and receive on the triode, the collector electrode of triode is through R thus
30Be passed to ringing-current and drive triode Q
3Base stage.Local loop also has interchange ringing-current voltage (being generally 20Hz, 90 volts) by a relatively large margin except that direct voltage when the phone ring.Because the bypass filter action of capacitor C has only minimum alternating current component to flow through Q during ring
5And the light-emitting diode in the PI, C
3The further filtering of small alternating current component that triode in the PI is experienced again.Therefore, the DC level that transistor collector is exported in the PI can accurately reflect the dc state of local loop.During on-hook, no direct current in the local loop, the triode among the PI is a cut-off state, the level of its collector electrode output is zero volt.This moment Q
3Base stage determines whether ring by the ringing-current control signal from RC fully.When RC is+5 volts, Q
3Conducting is ringing condition.During user's off-hook, there is certain direct-current component in the loop, makes triode conducting in the PI.About-4.3 volts of voltages of this pipe collector output also pass through R
30Be added in Q
3On the base stage.Because R
30Less than R
26, this moment Q
3To be in cut-off state, ringing-current is blocked immediately, thereby reach the purpose of blocking ringing-current automatically.
In circulation and ringing-current feed circuit 1, include network Z
2, Z
3, resistance R
4, R
5, R
6, R
7, R
9, R
10Z
2By resistance R
31, R
32And capacitor C
4Constitute Z
3By resistance R
33, R
34And capacitor C
5Constitute.R
32With C
4Parallel circuits serial connection R
31Be connected across the TF end and hold same R with T
4Tie point between, R
34With C
5Parallel circuits be connected across RF end and hold same R with R
7Tie point between.Z
2, Z
3Input, the output impedance of decision user interface circuit T, R end.If Z
2, Z
3Be made of resistance-capacitance network respectively, the capacitive line impedance that remote subscriber's loop is produced obtains coupling, thereby improves the speech transmissions quality.
Frame principle figure such as Fig. 2, shown in Figure 3 that the utility model uses in program control space switching machine and program control time division switch device interior system.Circulation and ringing-current feed circuit 1 provide ringing-current and conversation power supply for extension.Bi-directional speech circuit 2 with balance 2 line conversion of signals become single-ended to earth signal to adapt to the space switching mode.If time-division switching, this partial circuit is replaced by 2/4 line change-over circuit 2, sees Fig. 3.Loop detection circuit 3 is used to detect the dialing of local loop state and extension.Ringing-current drive circuit 4 is finished the ringing-current break-make control of extension ringer.Constant-current circuit 5 makes the direct current in the local loop keep constant, makes whole user interface circuit obtain the short circuit overcurrent protection.
The utility model can be applicable in the user interface circuit of program control space switched system, anode, the Z of RT the 1st end and capacitor C
3, R
5And R
19Tie point on 5. terminal links to each other, and RT the 2nd end connects Q
5Collector electrode, RT the 3rd end connects Q
3Base stage and R
26Tie point.The main feature of program control space switching machine is to contain bi-directional speech circuit 2.It comprises by IC
1, Q
2And IC
3Forward (the going into space division switching network) passage that constitutes is by IC
4, Q
1Reverse (the going out space division switching network) passage that constitutes.Positive and negative two passages exist
The end tandem links to each other with space division switching network in the switch together then.Z
2, Z
3, R
4, R
5, R
6, R
7, R
9And R
10Constitute circulation and ringing-current feed circuit 1.Its 1., 3. external extension of end (be T, R end).IC
2, R
13, R
14, R
19, R
20Constitute loop detection circuit 3.9. termination light-emitting diode.10. end for pluck, on-hook and the test side of dialling, connect the control section in the switch.
End is detection threshold adjustable side, Q
3, Q
4And R
26Constitute ringing-current drive circuit 4.Wherein
Termination ringing-current relay coil,
Termination+5 volt,
Control section in the terminate switched machine,
End ground connection.Q
5, R
27, R
28And R
29Constitute constant-current circuit 5.Its 4. end be feed end, connect-48 volts or-48 volts and add 90 volts of ringing-currents (select connect by the ringing-current relay).RT constitutes user interface ringing-current cutting device 6.The utility model is applied to can make the user interface circuit of this space switching mode to have the automatic break-in facility of ringing-current herein.
The utility model can be applicable in the user interface circuit of program control time division switching system.Practical circuit as shown in Figure 5.RT the 1st end with
The positive pole of capacitor C links to each other on the terminal, RT the 2nd end and Q
4Collector electrode links to each other, RT the 3rd end and Q
3The same R of base stage
19Tie point link to each other.Resistance-capacitance network Z
2One end and Q
1Emitter, R
1, R
12And R
6Tie point on 1. terminal links to each other, Z
2The other end and R
49. linking to each other on the terminal (T end).Resistance-capacitance network Z
3One end and R
5, R
17 
Tie point on the terminal links to each other, Z
3The other end and R
710. linking to each other on the terminal (R end).The main feature of user interface circuit is to contain 2/4 line change-over circuit 2 in the program control time division switching system.It is by with IC
1, IC
3Be that the main speech sendaisle that constitutes reaches with IC
4, Q
1Be that the main speech receive path that constitutes is formed.Wherein, speech transmitting terminal V
XThe encoder that connects time division switching network in the switch, speech receiving terminal V
RThe decoder that connects this switching network.Z
2, Z
3, R
4, R
5, R
6, R
7, R
9And R
10Constitute circulation and ringing-current feed circuit 1.Z wherein
2, Z
3The 9., 10. end (being T, R end) extension set of answering the call be respectively resistance-capacitance network.Loop detection circuit 3 and ringing-current drive circuit 4 are roughly the same with the formation of aforementioned space switching machine user interface circuit appropriate section.Constant-current circuit 5 herein with aforementioned comparison, only increased by Q
5The circulation that constitutes is adjusted circuit.7. it hold with control section in the switch and link to each other.RT constitutes user interface ringing-current cutting device 6.The utility model is applied to can make the user interface circuit of this time-division switching mode to have the automatic break-in facility of ringing-current herein, and can make its input, output impedance be plural characteristic.
The utility model adds user interface ringing-current cutting device in the user interface circuit of existing space switching and time division switch, make to block ringing-current automatically and be achieved, and make input, the output impedance of user interface be required plural characteristic.Its compact conformation, production cost is lower, and extensive the making simply is easy to promote the use of.
Claims (3)
1, a kind of user interface ringing-current cutting device comprises circulation and ringing-current feed circuit 1, bi-directional speech circuit 2 (or 2/4 line change-over circuit 2), and loop detection circuit 3, ringing-current drive circuit 4 and constant-current circuit 5 is characterized in that:
A. between circulation and ringing-current feed circuit 1, ringing-current drive circuit 4 and constant-current circuit 5, increase a user interface ringing-current cutting device 6.Its formation comprises photoelectrical coupler P1, diode D, capacitor C
8And resistance R
8, R
30, the tie point of light-emitting diode anode and diode D negative terminal constitutes the 1st end and and the R of ringing-current cut off circuit RT in the photoelectrical coupler PI
8, capacitor C the tie point of anode on the RF terminal link to each other, in the PI the 2nd end of light-emitting diode negative terminal and the tie point formation RT of diode D anode and with triode Q
5Collector electrode links to each other, the base stage of triode serial connection C in the PI
3Be connected with ground, emitter is connected with-5 volts, collector series connection R
30Constitute the 3rd end and and the Q of RT
3The same R of base stage
26Tie point link to each other this collector electrode and R
30Tie point serial connection R
8Be connected to ground;
B. in circulation and ringing-current feed circuit 1, include network Z
2, Z
3, resistance R
4, R
5, R
6, R
7, R
9, R
10Z
2By resistance R
81, R
82And capacitor C
4Constitute Z
3By resistance R
33, R
34And capacitor C
5Constitute R
32With C
4Parallel circuits serial connection R
31Be connected across the TF end and hold same R with T
4Tie point between, R
34With C
5Parallel circuits be connected across RF end and hold same R with R
7Tie point between.
2, user interface ringing-current cutting device according to claim 1, it is characterized in that: this device can be used in the user interface circuit of program control space switched system, anode, the Z of RT the 1st end and capacitor C
3, R
5And R
19Tie point on 5. terminal links to each other, and RT the 2nd end connects Q
5Collector electrode, RT the 3rd end connects Q
3Base stage and R
26Tie point.
3, user interface ringing-current cutting device according to claim 1, it is characterized in that: this device can be applicable in the user interface circuit of program control time division switching system,
A.RT the 1st end with
The positive pole of capacitor C links to each other on the terminal, RT the 2nd end and Q
4Collector electrode links to each other, RT the 3rd end and Q
3The same R of base stage
19Tie point link to each other,
B. resistance-capacitance network Z
2One end and Q
1Emitter, R
1, R
12And R
6Tie point on 1. terminal links to each other, Z
2The other end and R
49. linking to each other resistance-capacitance network Z on the terminal (T end)
3One end and R
5, R
17 
Tie point on the terminal links to each other, Z
3The other end and R
710. linking to each other on the terminal (R end).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93242105 CN2183057Y (en) | 1993-10-12 | 1993-10-12 | Device for bell calling a subscriber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93242105 CN2183057Y (en) | 1993-10-12 | 1993-10-12 | Device for bell calling a subscriber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2183057Y true CN2183057Y (en) | 1994-11-16 |
Family
ID=33815895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93242105 Expired - Lifetime CN2183057Y (en) | 1993-10-12 | 1993-10-12 | Device for bell calling a subscriber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2183057Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067197C (en) * | 1994-06-22 | 2001-06-13 | 熊焰明 | Low internal feed equipment for subscriber's interface |
| CN111917920A (en) * | 2020-08-12 | 2020-11-10 | 上海剑桥科技股份有限公司 | Intelligent loop holding device |
-
1993
- 1993-10-12 CN CN 93242105 patent/CN2183057Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067197C (en) * | 1994-06-22 | 2001-06-13 | 熊焰明 | Low internal feed equipment for subscriber's interface |
| CN111917920A (en) * | 2020-08-12 | 2020-11-10 | 上海剑桥科技股份有限公司 | Intelligent loop holding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |