CN207039719U - Digital SPC exchange - Google Patents
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- CN207039719U CN207039719U CN201721000015.3U CN201721000015U CN207039719U CN 207039719 U CN207039719 U CN 207039719U CN 201721000015 U CN201721000015 U CN 201721000015U CN 207039719 U CN207039719 U CN 207039719U
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Abstract
The utility model discloses a kind of digital SPC exchange, including the interchanger body with serial communication port circuit and some domestic consumer's port circuits, and domestic consumer's port circuit is used to be connected with common phone or emergency telephone；Emergency telephone is used to export emergency start signal and emergency notice content information；Serial communication port circuit is used to connect the serial data communication between computer and interchanger body；Interchanger body is used to, when receiving the emergency start signal of computer/emergency telephone output, export jingle bell control signal, and when recognizing common phone off-hook, the emergency notice content information that emergency telephone exports is sent to common phone；Domestic consumer's port circuit is used for when receiving jingle bell control signal, controls common phone jingle bell, and, the emergency start signal of emergency telephone output and emergency notice content information are sent to interchanger body.This digital SPC exchange can realize an one-key emergent call function, easy to operate.
Description
Technical Field
The utility model relates to a switch technical field, in particular to digital stored program control switch.
Background
The digital program controlled exchanger is widely applied to occasions with large flow of people such as hotels, saunas, hospitals and the like.
The existing digital program control exchanger can be controlled only by matching with an emergency fire-fighting system or a public address system in addition when an emergency call is needed, and the operation is troublesome.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to provide a digital program controlled switch, which is convenient for the digital program controlled switch to realize the operation of the emergency call function.
In order to achieve the above object, the digital program controlled switch provided by the present invention comprises a switch body, wherein the switch body has a serial communication port circuit and a plurality of common user port circuits, the serial communication port circuit is used for connecting with a computer, and the common user port circuits are used for connecting with a common telephone or an emergency telephone; the emergency telephone is used for outputting an emergency starting signal and emergency notification content information; the serial communication port circuit is used for connecting serial data communication between the computer and the switch body; the switch body is used for outputting a ring control signal when receiving an emergency starting signal output by the computer/emergency telephone and sending emergency notification content information output by the emergency telephone to the common telephone when recognizing that the common telephone is off-hook; and the common user port circuit is used for controlling the common telephone to ring when receiving the ring control signal, and sending the emergency starting signal and the emergency notification content information output by the emergency telephone to the switchboard body.
Preferably, the serial communication port circuit comprises a first overvoltage and overcurrent protection unit and a serial communication subunit; the first input end, the second output end, the third input end and the fourth output end of the first overvoltage and overcurrent protection unit are all connected with the computer; a first output end of the first overvoltage and overcurrent protection unit is connected with a first input end of the serial communication subunit, a second input end of the first overvoltage and overcurrent protection unit is connected with a second output end of the serial communication subunit, a third output end of the first overvoltage and overcurrent protection unit is connected with a third input end of the serial communication subunit, and a fourth input end of the first overvoltage and overcurrent protection unit is connected with a fourth output end of the serial communication subunit; and the first output end, the second input end, the third output end and the fourth input end of the serial communication subunit are all connected with a control chip in the switch body.
Preferably, the first overvoltage and overcurrent protection unit comprises ten transient voltage suppression diodes and four resistors; the first end of the first transient voltage suppression diode, the first end of the second transient voltage suppression diode and the first end of the first resistor are interconnected, and the connection node of the first transient voltage suppression diode and the first end of the second transient voltage suppression diode is the first input end of the first overvoltage and overcurrent protection unit; the second end of the first transient voltage suppressor diode and the first end of the third transient voltage suppressor diode are both grounded, the second end of the third transient voltage suppressor diode is connected with the second end of the first resistor, and the connection node of the third transient voltage suppressor diode is the first output end of the first overvoltage and overcurrent protection unit; the second end of the second transient voltage suppression diode, the first end of the second resistor and the first end of the fourth transient voltage suppression diode are interconnected, and the connection node of the second transient voltage suppression diode, the first end of the second resistor and the first end of the fourth transient voltage suppression diode is the second output end of the first overvoltage and overcurrent protection unit; a second end of the fourth transient voltage suppressor diode and a first end of a fifth transient voltage suppressor diode are both grounded, a second end of the fifth transient voltage suppressor diode is connected with a second end of the second resistor, and a connection node of the fifth transient voltage suppressor diode is a second input end of the first overvoltage and overcurrent protection unit; the first end of the sixth transient voltage suppression diode, the first end of the seventh transient voltage suppression diode and the first end of the third resistor are interconnected, and the connection node of the sixth transient voltage suppression diode, the first end of the seventh transient voltage suppression diode and the first end of the third resistor is the third input end of the first overvoltage and overcurrent protection unit; a second end of the sixth transient voltage suppressor diode and a first end of the eighth transient voltage suppressor diode are both grounded, a second end of the eighth transient voltage suppressor diode is connected with a second end of the third resistor, and a connection node of the eighth transient voltage suppressor diode is a third output end of the first overvoltage and overcurrent protection unit; a second end of the seventh transient voltage suppressor diode, a first end of a fourth resistor and a first end of a ninth transient voltage suppressor diode are interconnected, and a connection node of the seventh transient voltage suppressor diode, the first end of the fourth resistor and the first end of the ninth transient voltage suppressor diode is a fourth output end of the first overvoltage and overcurrent protection unit; a second end of the ninth transient voltage suppressor diode and a first end of the tenth transient voltage suppressor diode are both grounded, a second end of the tenth transient voltage suppressor diode is connected with a second end of the fourth resistor, and a connection node of the tenth transient voltage suppressor diode and the fourth resistor is a fourth input end of the first overvoltage and overcurrent protection unit.
Preferably, the serial communication subunit includes a communication chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a first power supply; the power pin of the communication chip is connected with the first power supply, and the grounding pin of the communication chip is grounded; a first input pin of the communication chip is a first input end of the serial communication subunit, and a first output pin of the communication chip is a first output end of the serial communication subunit; a second input pin of the communication chip is a second input end of the serial communication subunit, and a second output pin of the communication chip is a second output end of the serial communication subunit; a third input pin of the communication chip is a third input end of the serial communication subunit, and a third output pin of the communication chip is a third output end of the serial communication subunit; a fourth input pin of the communication chip is a fourth input end of the serial communication subunit, and a fourth output pin of the communication chip is a fourth output end of the serial communication subunit; a first positive power supply pin of the communication chip is connected with a first end of the first capacitor, and a first negative power supply pin of the communication chip is connected with a second end of the first capacitor; the second positive power supply pin of the communication chip is connected with the first end of the second capacitor, the second negative power supply pin of the communication chip is connected with the second end of the second capacitor, the third positive power supply pin of the communication chip is connected with the first end of the third capacitor, the third negative power supply pin of the communication chip is connected with the first end of the fourth capacitor, and the second end of the third capacitor is connected with the second end of the fourth capacitor.
Preferably, the common user port circuit comprises a power supply providing unit, a ring control unit, a voice transmission unit and a second overvoltage and overcurrent protection unit; the output end of the power supply unit, the input end of the voice transmission unit and the second signal end of the ring control unit are interconnected, the input end of the power supply unit is connected with the second signal end of the second overvoltage and overcurrent protection unit, and the feedback end of the power supply unit, the output end of the voice transmission unit and the fourth signal end of the ring control unit are all connected with the control chip in the switch body; and a third signal end of the ring control unit is connected with an alternating current power supply, a first signal end of the ring control unit is connected with a fourth signal end of the second overvoltage and overcurrent protection unit, and a first signal end and a second signal end of the second overvoltage and overcurrent protection unit are used for connecting the common telephone or the emergency telephone.
Preferably, the second overvoltage and overcurrent protection unit includes an eleventh transient voltage suppression diode, a twelfth transient voltage suppression diode, a thirteenth transient voltage suppression diode, a fifth resistor, a sixth resistor, and a first protection chip; a power pin of the first protection chip is connected with a second power supply, a ground pin of the first protection chip is grounded, an output pin of the first protection chip, a second end of the eleventh transient voltage suppression diode, a first end of the twelfth transient voltage suppression diode and a second end of the fifth resistor are interconnected, a connection node of the first protection chip is a second signal end of the second overvoltage and overcurrent protection unit, a second end of the twelfth transient voltage suppression diode, a first end of the thirteenth transient voltage suppression diode and a second end of the sixth resistor are interconnected, and a connection node of the twelfth transient voltage suppression diode, the first end of the thirteenth transient voltage suppression diode and a second end of the sixth resistor is a fourth signal end of the second overvoltage and overcurrent protection unit; a first end of the eleventh transient voltage suppressor diode and a second end of the thirteenth transient voltage suppressor diode are both grounded, a first end of the fifth resistor is a first signal end of the second overvoltage and overcurrent protection unit, and a first end of the sixth resistor is a second signal end of the second overvoltage and overcurrent protection unit.
Preferably, the ringing control unit includes a seventh resistor, an eighth resistor, a first transistor, a fourteenth diode, and a relay; the first end of the seventh resistor is a fourth signal end of the ringing control unit, the second end of the seventh resistor is connected with a controlled end of the first transistor, the output end of the first transistor is grounded, the input end of the first transistor, the anode of the fourteenth diode and the coil cathode pin of the relay are interconnected, the cathode of the fourteenth diode and the coil anode pin of the relay are both connected with a third power supply, the common point of the relay is the first signal end of the ringing control unit, the normally closed point of the relay is the second signal end of the ringing control unit, the normally open point of the relay is connected with the first end of the eighth resistor, the connection node of the relay is the third signal end of the ringing control unit, and the second end of the eighth resistor is connected with an alternating current power supply.
Preferably, the voice transmission unit includes a transformer and a fifth capacitor, an anode of the fifth capacitor is an input end of the voice transmission unit, a cathode of the fifth capacitor is connected to a first end of the primary coil of the transformer, a first end of the secondary coil of the transformer is an output end of the voice transmission unit, and a second end of the secondary winding of the transformer is grounded.
Preferably, the power supply unit includes a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second transistor, a third transistor, a fourth transistor, a fifteenth diode, a second protection chip, and a third protection chip; a first end of the ninth resistor, a first end of the sixth capacitor and a first input pin of the second protection chip are all connected with a second power supply, a second end of the ninth resistor is connected with an input end of the second transistor, a controlled end of the second transistor, a second end of the sixth capacitor, a first end of the tenth resistor and a second input pin of the second protection chip are interconnected, an output end of the second transistor is connected with a second end of the tenth resistor, and a connection node of the second transistor is an output end of the power supply unit; an input end of the third transistor is connected to a first end of the eleventh resistor, a connection node of the third transistor is an input end of the power supply unit, a controlled end of the third transistor, a second end of the eleventh resistor, a first end of the seventh capacitor, and a first input pin of the third protection chip are interconnected, an output end of the third transistor is connected to a first end of the twelfth resistor, a second end of the seventh capacitor, a second input pin of the third protection chip, a first end of the thirteenth resistor, a cathode of the fifteenth diode, an anode of the eighth capacitor, and a controlled end of the fourth transistor are interconnected, a second end of the thirteenth resistor, an anode of the fifteenth diode, a cathode of the eighth capacitor, and an output end of the fourth transistor are all grounded, the input end of the fourth transistor is a feedback end of the power supply unit.
The technical proposal of the utility model is that the computer is adopted to output the emergency starting signal; the emergency telephone outputs an emergency starting signal and emergency notification content information; the serial communication port circuit is connected with the extreme end and communicates with the serial data of the switch body; the switch body outputs a ring control signal when receiving an emergency starting signal, and transmits emergency notification content information output by the emergency telephone to the common telephone when recognizing that the common telephone is off-hook; and the common user port circuit controls the common telephone to ring when receiving the ring control signal, and sends the emergency starting signal/emergency notification content information output by the emergency telephone to the switchboard body. Thus, when the digital program control exchanger is used, the emergency call function can be realized only by setting one of the ordinary telephones as an emergency call telephone, which is very simple and convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of functional modules of an embodiment of the digital SPC exchange of the present invention;
FIG. 2 is a circuit diagram of an embodiment of the serial communication port circuit of FIG. 1;
fig. 3 is a schematic circuit diagram of an embodiment of the ordinary user port circuit in fig. 1.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a digit programme-controlled switch, this digit programme-controlled switch can realize urgent call, and the function is abundant.
Referring to fig. 1, in an embodiment, the digital SPC exchange includes an exchange body 200, the exchange body 200 has a serial communication port circuit 210 and a plurality of general user port circuits 220, the serial communication port circuit 210 is connected to the computer 100, and the general user port circuits 220 are connected to a general telephone or an emergency telephone.
Here, the computer 100 is configured to output an emergency start signal. The emergency telephone is used for outputting an emergency starting signal and emergency notification content information. The serial communication port circuit 210 is used to connect serial data communication between the computer 100 and the switch body 200. The exchange body 200 is used for outputting a ring control signal when receiving an emergency start signal output by the computer 100/emergency telephone, and transmitting emergency notification content information output by the emergency telephone to a normal telephone when recognizing that the normal telephone is off-hook. The general subscriber port circuit 220 is configured to control a general phone to ring when receiving the ring control signal, and to transmit an emergency start signal and emergency notification content information output by the emergency phone to the switch body 200.
Note that, the computer 100 has billing management software or hotel management software installed therein. When a user (such as a hotel manager or nurse, etc.) needs to broadcast emergency notification content information to a customer, this can be done by clicking on a call option in the billing management software system or the hotel management software system. It is worth mentioning that since the emergency telephone set also has a function of outputting an emergency start signal, the customer (hotel customer or patient in ward, etc.) can also broadcast emergency notification content information to the external connection through the digital SPC exchange.
Specifically, in the working process of the digital stored program control exchange:
first, the billing management software/hotel management software outputs an emergency start signal to the switch body 200 through the serial communication port circuit 210, or the emergency telephone outputs an emergency start signal to the switch body 200 through the general user port circuit 220.
Then, the switch body 200 outputs a ring control signal to the general subscriber port circuit 220, and the general subscriber port circuit 220 controls all the general extensions (or a part of the general extensions) to ring until recognizing that there is a general extension to be off-hook.
Then, the emergency telephone set outputs the emergency notice content information to the exchange body 200 through the general subscriber port circuit 220.
Finally, the exchange body 200 transmits the received emergency notification content information to the ordinary telephone set which is off-hook, thereby implementing the emergency call function.
The technical proposal of the utility model is that the computer 100 is adopted to output the emergency starting signal; the emergency telephone outputs an emergency starting signal and emergency notification content information; the serial communication port circuit 210 is connected with the terminal and communicates with the serial data of the switch body 200; the exchange body 200 outputs a ring control signal when receiving the emergency start signal, and transmits emergency notification content information output by the emergency telephone to the ordinary telephone when recognizing that the ordinary telephone is off-hook; the general subscriber port circuit 220 controls the general phone to ring when receiving the ring control signal, and transmits the emergency start signal/emergency notification content information outputted from the emergency phone to the exchange body 200. Therefore, when the digital program control exchanger is used, the emergency call function can be realized only by setting one of the common telephones as an emergency call telephone, which is very convenient.
Referring to fig. 2, optionally, the serial communication port circuit 210 includes a first over-voltage and over-current protection unit 211 and a serial communication subunit 212.
A first input end, a second output end, a third input end and a fourth output end of the first overvoltage and overcurrent protection unit 211 are all connected with the computer 100; a first output end of the first overvoltage and overcurrent protection unit 211 is connected with a first input end of the serial communication subunit 212, a second input end of the first overvoltage and overcurrent protection unit 211 is connected with a second output end of the serial communication subunit 212, a third output end of the first overvoltage and overcurrent protection unit 211 is connected with a third input end of the serial communication subunit 212, and a fourth input end of the first overvoltage and overcurrent protection unit 211 is connected with a fourth output end of the serial communication subunit 212; the first output terminal, the second input terminal, the third output terminal and the fourth input terminal of the serial communication subunit 212 are all connected to a control chip (not shown) in the switch body 200.
Specifically, in the working process of the serial communication port circuit 210, if the voltage/current of the input signal is too large, the first overvoltage/overcurrent protection unit 211 starts overvoltage/overcurrent protection, prevents components from being damaged, and improves the reliability of the circuit.
Preferably, the first overvoltage/overcurrent protection unit 211 includes ten tvs and four resistors.
Specifically, a first terminal of the first tvs D1, a first terminal of the second tvs D2, and a first terminal of the first resistor R1 are interconnected, and a connection node thereof is a first input terminal of the first overvoltage/overcurrent protection unit 211; the second terminal of the first tvs D1 and the first terminal of the third tvs D3 are both grounded, the second terminal of the third tvs D3 is connected to the second terminal of the first resistor R1, and the connection node is the first output terminal of the first over-voltage and over-current protection unit 211.
The second end of the second tvs D2, the first end of the second resistor R2, and the first end of the fourth tvs D4 are interconnected, and a connection node thereof is the second output terminal of the first overvoltage/overcurrent protection unit 211; a second terminal of the fourth tvs D4 and a first terminal of the fifth tvs D5 are both grounded, a second terminal of the fifth tvs D5 is connected to a second terminal of the second resistor R2, and a connection node thereof is a second input terminal of the first over-voltage and over-current protection unit 211.
A first end of the sixth tvs D6, a first end of the seventh tvs D7, and a first end of the third resistor R3 are interconnected, and a connection node thereof is a third input terminal of the first overvoltage/overcurrent protection unit 211; a second end of the sixth tvs D6 and a first end of the eighth tvs D8 are both grounded, a second end of the eighth tvs D8 is connected to a second end of the third resistor R3, and a connection node thereof is a third output terminal of the first over-voltage and over-current protection unit 211.
A second end of the seventh tvs D7, a first end of the fourth resistor R4, and a first end of the ninth tvs D9 are interconnected, and a connection node thereof is a fourth output terminal of the first overvoltage/overcurrent protection unit 211; a second terminal of the ninth tvs D9 and a first terminal of the tenth tvs D10 are both grounded, a second terminal of the tenth tvs D10 is connected to a second terminal of the fourth resistor R4, and a connection node thereof is a fourth input terminal of the first over-voltage and over-current protection unit 211.
Preferably, the serial communication subunit 212 includes a communication chip U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a first power VCC 1.
Specifically, a power pin VCC of the communication chip U1 is connected to the first power supply VCC1, and a ground pin GND of the communication chip U1 is grounded; the first input pin R2IN of the communication chip U1 is a first input end of the serial communication subunit 212, and the first output pin R2OUT of the communication chip U1 is a first output end of the serial communication subunit 212; the second input pin T2IN of the communication chip U1 is a second input terminal of the serial communication subunit 212, and the second output pin T2OUT of the communication chip U1 is a second output terminal of the serial communication subunit 212; the third input pin R1IN of the communication chip U1 is the third input end of the serial communication subunit 212, and the third output pin R1OUT of the communication chip U1 is the third output end of the serial communication subunit 212; the fourth input pin T1IN of the communication chip U1 is a fourth input terminal of the serial communication subunit 212, and the fourth output pin T1OUT of the communication chip U1 is a fourth output terminal of the serial communication subunit 212.
The first positive power supply pin C1+ of the communication chip U1 is connected with the first end of the first capacitor C1, and the first negative power supply pin C1-of the communication chip U1 is connected with the second end of the first capacitor C1; the second positive power supply pin C2+ of the communication chip U1 is connected to the first terminal of the second capacitor C2, the second negative power supply pin C2-of the communication chip U1 is connected to the second terminal of the second capacitor C2, the third positive power supply pin V + of the communication chip U1 is connected to the first terminal of the third capacitor C3, the third negative power supply pin V-of the communication chip U1 is connected to the first terminal of the fourth capacitor C4, and the second terminal of the third capacitor C3 is connected to the second terminal of the fourth capacitor C4.
Referring to fig. 3, optionally, the general user port circuit 220 includes a power supply unit 224, a ring control unit 222, a voice transmission unit 223, and a second over-voltage and over-current protection unit 221.
The output end of the power supply unit 224, the input end of the voice transmission unit 223 and the second signal end of the ring control unit 222 are interconnected, the input end of the power supply unit 224 is connected with the second signal end of the second overvoltage and overcurrent protection unit 221, and the feedback end of the power supply unit 224, the output end of the voice transmission unit 223 and the fourth signal end of the ring control unit 222 are all connected with the control chip in the switch body 200.
A third signal end of the ringing control unit 222 is connected to an ac power supply, a first signal end of the ringing control unit 222 is connected to a fourth signal end of the second overvoltage/overcurrent protection unit 221, and a first signal end and a second signal end of the second overvoltage/overcurrent protection unit 221 are used for connecting a general telephone or an emergency telephone.
Specifically, in the working process of the common user port circuit 220, the fourth signal terminal of the ring control unit 222 is not triggered, the first signal terminal of the ring control unit 222 is communicated with the second signal terminal, and the constant current output by the power supply unit 224 is output to the common phone through the ring control unit 222, so as to maintain the power supply of the common phone.
In an emergency, the fourth signal terminal of the ring control unit 222 receives a trigger, the first signal terminal of the ring control unit 222 is communicated with the third signal terminal, the ac power is output to the general phone through the ring control unit 222, and the general phone rings. Thereafter, when a general telephone is off-hook, on the one hand, the emergency telephone transmits emergency notification content information to the exchange body 200 through the voice transmission unit 223; on the other hand, the exchange body 200 recognizes that there is a normal telephone off-hook, and transmits the received emergency notice content information to the off-hook normal telephone.
In the whole process, the base calling function can be realized only by setting one of the ordinary telephones as an emergency telephone, and the method is very simple and convenient.
Preferably, the second overvoltage/overcurrent protection unit 221 includes an eleventh tvs diode D11, a twelfth tvs diode D12, a thirteenth tvs diode D13, a fifth resistor R5, a sixth resistor R6, and a first protection chip U2.
A power pin V + of the first protection chip U2 is connected to the second power VCC2, a ground pin V-of the first protection chip U2 is grounded, an output pin AC of the first protection chip U2, a second end of the eleventh tvs diode D11, a first end of the twelfth tvs diode D12, and a second end of the fifth resistor R5 are interconnected, a connection node thereof is a second signal end of the second over-voltage and over-current protection unit 221, a second end of the twelfth tvs diode D12, a first end of the thirteenth tvs diode D13, and a second end of the sixth resistor R6 are interconnected, and a connection node thereof is a fourth signal end of the second over-voltage and over-current protection unit 221.
A first end of the eleventh tvs D11 and a second end of the thirteenth tvs D13 are both grounded, a first end of the fifth resistor R5 is a first signal end of the second overvoltage/overcurrent protection unit 221, and a first end of the sixth resistor R6 is a second signal end of the second overvoltage/overcurrent protection unit 221.
It should be noted that, in the present embodiment, the first protection chip U2 further has an input pin AC, and the input pin AC is connected to the output terminal of the power supply unit 224.
Specifically, in the working process of the common user port circuit 220, if the voltage/current input to the power supply of the common telephone is too large, the second overvoltage/overcurrent protection unit 221 starts overvoltage/overcurrent protection, so as to prevent components from being damaged and improve the reliability of the circuit.
Preferably, the ringing control unit 222 includes a seventh resistor R7, an eighth resistor R8, a first transistor Q1, a fourteenth diode D14 and a relay J.
The first end of the seventh resistor R7 is a fourth signal end of the ring control unit 222, the second end of the seventh resistor R7 is connected to the controlled end of the first transistor Q1, the output end of the first transistor Q1 is grounded, the input end of the first transistor Q1, the anode of the fourteenth diode D14 and the negative coil pin of the relay J are interconnected, the cathode of the fourteenth diode D14 and the positive coil pin of the relay J are both connected to the third power VCC3, the common point P of the relay J is the first signal end of the ring control unit 222, the normally closed point M of the relay J is the second signal end of the ring control unit 222, the normally open point N of the relay J is connected to the first end of the eighth resistor R8, the connection node thereof is the third signal end of the ring control unit 222, and the second end of the eighth resistor R8 is connected to the ac power supply.
Specifically, when the ringing control unit 222 is triggered, the first transistor Q1 is turned on, the negative pin of the coil of the relay J is grounded through the first transistor Q1, and the common point P of the relay J is communicated with the normally open point N, that is, the first signal terminal of the ringing control unit 222 is communicated with the third signal terminal. When the ringing control unit 222 is not triggered, the first transistor Q1 is turned off, and the common point P of the relay J communicates with the normally closed point M, that is, the first signal terminal and the second signal terminal of the ringing control unit 222 communicate.
It should be noted that in the present embodiment, the first transistor Q1 is used as a switch. The first transistor Q1 can be an NPN transistor, a base of the NPN transistor is a controlled terminal of the first transistor Q1, a collector of the NPN transistor is an input terminal of the first transistor Q1, and an emitter of the NPN transistor is an output terminal of the first transistor Q1.
Preferably, the voice transmission unit 223 includes a transformer TR and a fifth capacitor C5, wherein an anode of the fifth capacitor C5 is an input terminal of the voice transmission unit 223, a cathode of the fifth capacitor C5 is connected to a first terminal of a primary winding of the transformer TR, a first terminal of a secondary winding of the transformer TR is an output terminal of the voice transmission unit 223, and a second terminal of the secondary winding of the transformer TR is grounded.
It should be noted that in this embodiment, the second end of the primary coil of the transformer TR is connected to the second signal end of the second overvoltage/overcurrent protection unit 221.
Specifically, the emergency notification content information output by the emergency telephone is ac/dc coupled via the fifth capacitor C5, and then transmitted to the exchange body 200 via the transformer TR.
Preferably, the power supply unit 224 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifteenth diode D15, a second protection chip U3, and a third protection chip U4.
The first end of the ninth resistor R9, the first end of the sixth capacitor C6 and the first input pin a of the second protection chip U3 are all connected to the second power VCC2, the second end of the ninth resistor R9 is connected to the input end of the second transistor Q2, the controlled end of the second transistor Q2, the second end of the sixth capacitor C6, the first end of the tenth resistor R10 and the second input pin K of the second protection chip U3 are interconnected, the output end of the second transistor Q2 is connected to the second end of the tenth resistor R10, and the connection node thereof is the output end of the power supply unit 224.
An input terminal of the third transistor Q3 is connected to a first terminal of the eleventh resistor R11, a connection node thereof is an input terminal of the power supply unit 224, a controlled terminal of the third transistor Q3, a second terminal of the eleventh resistor R11, a first terminal of the seventh capacitor C7 and a first input pin a of the third protection chip U4 are interconnected, an output terminal of the third transistor Q3 is connected to a first terminal of the twelfth resistor R12, a second terminal of the twelfth resistor R12, a second terminal of the seventh capacitor C7 and a second input pin K of the third protection chip U4, a first end of the thirteenth resistor R13, a cathode of the fifteenth diode D15, an anode of the eighth capacitor C8, and a controlled end of the fourth transistor Q4 are interconnected, a second end of the thirteenth resistor R13, an anode of the fifteenth diode D15, a cathode of the eighth capacitor C8, and an output end of the fourth transistor Q4 are all grounded, and an input end of the fourth transistor Q4 is a feedback end of the power supply unit 224. The second protection chip U3 and the third protection chip U4 both have an output pin AK.
Specifically, during the operation of the power supply unit 224, the second power VCC2 is sequentially outputted through the ninth resistor R9 and the second transistor Q2, and then sequentially outputted to the ground through the third transistor Q3, the twelfth resistor R12 and the fourth transistor Q4.
In the whole process, the sixth capacitor C6 and the tenth resistor R10 generate the reference voltage of the second transistor Q2, and the eleventh resistor R11 and the seventh capacitor C7 generate the reference voltage of the third transistor Q3. In this way, the power supply unit 224 can provide a constant current power supply for a general phone.
In this embodiment, the second transistor Q2 and the third transistor Q3 both have a constant current function, the second transistor Q2 can be a PNP transistor, and the third transistor Q3 and the fourth transistor Q4 can be NPN transistors. Specifically, the method comprises the following steps:
the base of the PNP transistor is the controlled terminal of the second transistor Q2, the emitter of the PNP transistor is the input terminal of the second transistor Q2, and the collector of the PNP transistor is the output terminal of the second transistor Q2. The base of the NPN transistor is the controlled terminal of the third transistor Q3, the collector of the NPN transistor is the input terminal of the third transistor Q3, and the emitter of the NPN transistor is the output terminal of the third transistor Q3. The base of the NPN transistor is the controlled terminal of the fourth transistor Q4, the collector of the NPN transistor is the input terminal of the fourth transistor Q4, and the emitter of the NPN transistor is the output terminal of the fourth transistor Q4.
The working principle of the digital SPC exchange is described below with reference to FIGS. 1 to 3:
first, the billing management software/hotel management software outputs an emergency start signal to the switch body 200 through the serial communication port circuit 210, or the emergency telephone outputs an emergency start signal to the switch body 200 through the general user port circuit 220.
Then, the switch body 200 outputs a ring control signal to the common user port circuit 220, the first transistor Q1 is turned on, the coil negative pin of the relay J is grounded through the first transistor Q1, the common point of the relay J is connected with the normally open point, the ac power is sequentially output to the common phone through the eighth resistor R8, the relay J and the second overvoltage/overcurrent protection unit 221, and the common phone rings.
Then, when a normal telephone is off-hook: on one hand, the emergency telephone outputs the emergency notification content information to the exchange body 200 through the fifth capacitor C5 and the transformer TR; on the other hand, the exchange body 200 recognizes that there is a normal telephone set off-hook, and transmits the received emergency notice content information to the normal extension set off-hook.
And finally, the common extension receives the emergency notification content information, and the digital stored program control exchange completes the emergency call function.
The digital stored program control exchanger has the following beneficial effects:
(1) the emergency call function of the whole system is realized by accessing an emergency telephone or an emergency button on software, the response is fast, and the efficiency is low;
(2) the emergency call is realized on the basis of the original program control exchange, and no new equipment is required to be additionally put into the emergency call to update the capacity, so that the economic value is high;
(3) on the occasion with large flow, the quick emergency call processing under the emergency condition can be realized;
(4) single equipment integration is adopted, so that the method is reliably realized, and the whole application investment is optimized;
(5) the protocol between the devices adopts standard assistance, and the compatibility is strong.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. A digital program controlled exchanger is characterized in that the digital program controlled exchanger comprises an exchanger body, wherein the exchanger body is provided with a serial communication port circuit and a plurality of common user port circuits, the serial communication port circuit is used for being connected with a computer, and the common user port circuits are used for being connected with a common telephone or an emergency telephone; wherein,
the emergency telephone is used for outputting an emergency starting signal and emergency notification content information;
the serial communication port circuit is used for serial data communication between the computer and the switch body;
the switch body is used for outputting a ring control signal when receiving an emergency starting signal output by the computer/emergency telephone and sending emergency notification content information output by the emergency telephone to the common telephone when recognizing that the common telephone is off-hook;
and the common user port circuit is used for controlling the common telephone to ring when receiving the ring control signal, and sending the emergency starting signal and the emergency notification content information output by the emergency telephone to the switchboard body.
2. The digital SPC switch of claim 1, wherein said serial communication port circuit comprises a first over-voltage over-current protection unit and a serial communication subunit;
the first input end, the second output end, the third input end and the fourth output end of the first overvoltage and overcurrent protection unit are all connected with the computer; a first output end of the first overvoltage and overcurrent protection unit is connected with a first input end of the serial communication subunit, a second input end of the first overvoltage and overcurrent protection unit is connected with a second output end of the serial communication subunit, a third output end of the first overvoltage and overcurrent protection unit is connected with a third input end of the serial communication subunit, and a fourth input end of the first overvoltage and overcurrent protection unit is connected with a fourth output end of the serial communication subunit; and the first output end, the second input end, the third output end and the fourth input end of the serial communication subunit are all connected with a control chip in the switch body.
3. The digital SPC switch of claim 2, wherein said first over-voltage over-current protection unit comprises ten TVS diodes and four resistors;
the first end of the first transient voltage suppression diode, the first end of the second transient voltage suppression diode and the first end of the first resistor are interconnected, and the connection node of the first transient voltage suppression diode and the first end of the second transient voltage suppression diode is the first input end of the first overvoltage and overcurrent protection unit; the second end of the first transient voltage suppressor diode and the first end of the third transient voltage suppressor diode are both grounded, the second end of the third transient voltage suppressor diode is connected with the second end of the first resistor, and the connection node of the third transient voltage suppressor diode is the first output end of the first overvoltage and overcurrent protection unit;
the second end of the second transient voltage suppression diode, the first end of the second resistor and the first end of the fourth transient voltage suppression diode are interconnected, and the connection node of the second transient voltage suppression diode, the first end of the second resistor and the first end of the fourth transient voltage suppression diode is the second output end of the first overvoltage and overcurrent protection unit; a second end of the fourth transient voltage suppressor diode and a first end of a fifth transient voltage suppressor diode are both grounded, a second end of the fifth transient voltage suppressor diode is connected with a second end of the second resistor, and a connection node of the fifth transient voltage suppressor diode is a second input end of the first overvoltage and overcurrent protection unit;
the first end of the sixth transient voltage suppression diode, the first end of the seventh transient voltage suppression diode and the first end of the third resistor are interconnected, and the connection node of the sixth transient voltage suppression diode, the first end of the seventh transient voltage suppression diode and the first end of the third resistor is the third input end of the first overvoltage and overcurrent protection unit; a second end of the sixth transient voltage suppressor diode and a first end of the eighth transient voltage suppressor diode are both grounded, a second end of the eighth transient voltage suppressor diode is connected with a second end of the third resistor, and a connection node of the eighth transient voltage suppressor diode is a third output end of the first overvoltage and overcurrent protection unit;
a second end of the seventh transient voltage suppressor diode, a first end of a fourth resistor and a first end of a ninth transient voltage suppressor diode are interconnected, and a connection node of the seventh transient voltage suppressor diode, the first end of the fourth resistor and the first end of the ninth transient voltage suppressor diode is a fourth output end of the first overvoltage and overcurrent protection unit; a second end of the ninth transient voltage suppressor diode and a first end of the tenth transient voltage suppressor diode are both grounded, a second end of the tenth transient voltage suppressor diode is connected with a second end of the fourth resistor, and a connection node of the tenth transient voltage suppressor diode and the fourth resistor is a fourth input end of the first overvoltage and overcurrent protection unit.
4. The digital SPC switch of claim 2, wherein said serial communication subunit comprises a communication chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a first power supply;
the power pin of the communication chip is connected with the first power supply, and the grounding pin of the communication chip is grounded; a first input pin of the communication chip is a first input end of the serial communication subunit, and a first output pin of the communication chip is a first output end of the serial communication subunit; a second input pin of the communication chip is a second input end of the serial communication subunit, and a second output pin of the communication chip is a second output end of the serial communication subunit; a third input pin of the communication chip is a third input end of the serial communication subunit, and a third output pin of the communication chip is a third output end of the serial communication subunit; a fourth input pin of the communication chip is a fourth input end of the serial communication subunit, and a fourth output pin of the communication chip is a fourth output end of the serial communication subunit;
a first positive power supply pin of the communication chip is connected with a first end of the first capacitor, and a first negative power supply pin of the communication chip is connected with a second end of the first capacitor; the second positive power supply pin of the communication chip is connected with the first end of the second capacitor, the second negative power supply pin of the communication chip is connected with the second end of the second capacitor, the third positive power supply pin of the communication chip is connected with the first end of the third capacitor, the third negative power supply pin of the communication chip is connected with the first end of the fourth capacitor, and the second end of the third capacitor is connected with the second end of the fourth capacitor.
5. The digital SPC exchange according to claim 1, wherein the common user port circuit comprises a power supply unit, a ring control unit, a voice transmission unit and a second over-voltage over-current protection unit;
the output end of the power supply unit, the input end of the voice transmission unit and the second signal end of the ring control unit are interconnected, the input end of the power supply unit is connected with the second signal end of the second overvoltage and overcurrent protection unit, and the feedback end of the power supply unit, the output end of the voice transmission unit and the fourth signal end of the ring control unit are all connected with the control chip in the switch body;
and a third signal end of the ring control unit is connected with an alternating current power supply, a first signal end of the ring control unit is connected with a fourth signal end of the second overvoltage and overcurrent protection unit, and a first signal end and a second signal end of the second overvoltage and overcurrent protection unit are used for connecting the common telephone or the emergency telephone.
6. The digital SPC switch of claim 5, wherein the second over-voltage and over-current protection unit comprises an eleventh TVS diode, a twelfth TVS diode, a thirteenth TVS diode, a fifth resistor, a sixth resistor, and a first protection chip;
a power pin of the first protection chip is connected with a second power supply, a ground pin of the first protection chip is grounded, an output pin of the first protection chip, a second end of the eleventh transient voltage suppression diode, a first end of the twelfth transient voltage suppression diode and a second end of the fifth resistor are interconnected, a connection node of the first protection chip is a second signal end of the second overvoltage and overcurrent protection unit, a second end of the twelfth transient voltage suppression diode, a first end of the thirteenth transient voltage suppression diode and a second end of the sixth resistor are interconnected, and a connection node of the twelfth transient voltage suppression diode, the first end of the thirteenth transient voltage suppression diode and a second end of the sixth resistor is a fourth signal end of the second overvoltage and overcurrent protection unit;
a first end of the eleventh transient voltage suppressor diode and a second end of the thirteenth transient voltage suppressor diode are both grounded, a first end of the fifth resistor is a first signal end of the second overvoltage and overcurrent protection unit, and a first end of the sixth resistor is a second signal end of the second overvoltage and overcurrent protection unit.
7. The digital SPC exchange of claim 5, wherein the ringing control unit comprises a seventh resistor, an eighth resistor, a first transistor, a fourteenth diode, and a relay;
the first end of the seventh resistor is a fourth signal end of the ringing control unit, the second end of the seventh resistor is connected with a controlled end of the first transistor, the output end of the first transistor is grounded, the input end of the first transistor, the anode of the fourteenth diode and the coil cathode pin of the relay are interconnected, the cathode of the fourteenth diode and the coil anode pin of the relay are both connected with a third power supply, the common point of the relay is the first signal end of the ringing control unit, the normally closed point of the relay is the second signal end of the ringing control unit, the normally open point of the relay is connected with the first end of the eighth resistor, the connection node of the relay is the third signal end of the ringing control unit, and the second end of the eighth resistor is connected with an alternating current power supply.
8. The digital SPC switch of claim 5, wherein the voice transmission unit comprises a transformer and a fifth capacitor, wherein the positive pole of the fifth capacitor is the input terminal of the voice transmission unit, the negative pole of the fifth capacitor is connected to the first terminal of the primary winding of the transformer, the first terminal of the secondary winding of the transformer is the output terminal of the voice transmission unit, and the second terminal of the secondary winding of the transformer is grounded.
9. The digital SPC switch of claim 5, wherein the power supply unit comprises a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second transistor, a third transistor, a fourth transistor, a fifteenth diode, a second protection chip and a third protection chip;
a first end of the ninth resistor, a first end of the sixth capacitor and a first input pin of the second protection chip are all connected with a second power supply, a second end of the ninth resistor is connected with an input end of the second transistor, a controlled end of the second transistor, a second end of the sixth capacitor, a first end of the tenth resistor and a second input pin of the second protection chip are interconnected, an output end of the second transistor is connected with a second end of the tenth resistor, and a connection node of the second transistor is an output end of the power supply unit;
an input end of the third transistor is connected to a first end of the eleventh resistor, a connection node of the third transistor is an input end of the power supply unit, a controlled end of the third transistor, a second end of the eleventh resistor, a first end of the seventh capacitor, and a first input pin of the third protection chip are interconnected, an output end of the third transistor is connected to a first end of the twelfth resistor, a second end of the seventh capacitor, a second input pin of the third protection chip, a first end of the thirteenth resistor, a cathode of the fifteenth diode, an anode of the eighth capacitor, and a controlled end of the fourth transistor are interconnected, a second end of the thirteenth resistor, an anode of the fifteenth diode, a cathode of the eighth capacitor, and an output end of the fourth transistor are all grounded, the input end of the fourth transistor is a feedback end of the power supply unit.
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| CN201721000015.3U CN207039719U (en) | 2017-08-10 | 2017-08-10 | Digital SPC exchange |
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| CN201721000015.3U CN207039719U (en) | 2017-08-10 | 2017-08-10 | Digital SPC exchange |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465840A (en) * | 2017-08-10 | 2017-12-12 | 深圳国威赛纳科技有限公司 | Digital SPC exchange |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465840A (en) * | 2017-08-10 | 2017-12-12 | 深圳国威赛纳科技有限公司 | Digital SPC exchange |
| CN107465840B (en) * | 2017-08-10 | 2023-06-27 | 深圳国威赛纳科技有限公司 | Digital program controlled exchanger |
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