CN209767525U - Public private network switching and relaying circuit for interphone terminal - Google Patents
Public private network switching and relaying circuit for interphone terminal Download PDFInfo
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- CN209767525U CN209767525U CN201921006753.8U CN201921006753U CN209767525U CN 209767525 U CN209767525 U CN 209767525U CN 201921006753 U CN201921006753 U CN 201921006753U CN 209767525 U CN209767525 U CN 209767525U
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- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
The utility model provides a public and private network switching and relay circuit of an interphone terminal, which comprises an MCU, a first signal switch, a second signal switch, a public network audio codec and a private network audio codec; the MCU is respectively and electrically connected with a first signal switch and a second signal switch, the first signal switch is respectively and electrically connected with the public network audio codec and the second signal switch, and the second signal switch is respectively and electrically connected with the private network audio codec, the microphone and the loudspeaker; the MCU controls the signal transmission channels of the first signal switch and the second signal switch so that the interphone transmits or receives signals under the working states of single public network working, single private network working, public network switching to private network working, private network switching to public network working or dual-duty working. The utility model discloses a relay effect is realized to two signal switch, through the signal transmission passageway of two signal switch of MCU control for when the signal of private network can't satisfy the communication requirement, accessible public network calls.
Description
Technical Field
The utility model relates to an intercom technical field, specifically speaking relates to a public private network of intercom terminal switches, relay circuit.
Background
When the private network interphone is at the edge of a private network coverage area, private network signals of partial users in the areas are weakened to be incapable of working normally; in addition, in the basement building, if no relay station is added, the private network signals basically do not exist, but public network operators have developed indoor coverage technology and engineering for many years in the basement and other buildings, and even in the basement with severely blocked signals, the public network still has good signal coverage. In the working areas of private networks such as urban areas, airports, docks and the like, the working areas are often important coverage areas of public networks, which means that the broadband and narrowband converged interphone works in the common coverage area of the private networks and the public networks in most cases.
The more vulnerable the large and complex network such as public network communication is, when natural disasters such as earthquake occur, the disasters may cause damage to communication infrastructure (such as optical cables, copper cables, wireless base stations, switching equipment, machine rooms), so that main communication inside disaster areas and with the outside is cut off. At this time, the private network communication can not be influenced, and the interphones of the personnel of each command department can be connected, so that the emergency information can be normally transmitted.
SUMMERY OF THE UTILITY MODEL
In order to solve the disadvantages of the prior art, the utility model aims to provide a public private network of interphone terminal switches, relay circuit to overcome the defects in the prior art.
in order to achieve the above object, the utility model provides an intercom terminal public/private network switches, relay circuit, intercom terminal public/private network switches, relay circuit includes MCU, first signal switch, second signal switch, public network audio codec, private network audio codec, public network communication module and private network communication module; the MCU is respectively and electrically connected with a first signal switch and a second signal switch, the first signal switch is respectively and electrically connected with a public network audio codec and a second signal switch, the second signal switch is respectively and electrically connected with a private network audio codec, a microphone and a loudspeaker, the public network audio codec is electrically connected with a public network communication module, and the private network audio codec is electrically connected with a private network communication module; the MCU controls the signal transmission channels of the first signal switch and the second signal switch so that the interphone transmits or receives signals under the working states of single public network working, single private network working, public network switching to private network working, private network switching to public network working or dual-duty working. The model of the public network audio codec is NAU88C10, the model of the private network audio codec is TI3204, the model of the public network communication module is EC20, and the model of the private network communication module is SCT 3258.
As a further explanation of the public and private network switching and relaying circuit of the intercom terminal of the present invention, preferably, in the working state of the single public network, the sound signal in the Tx transmitting circuit is transmitted from the microphone to the second signal switch, then transmitted from the second signal switch to the first signal switch, and finally transmitted from the first signal switch to the public network audio codec; and signals of the public network audio codec in the Rx receiving circuit are transmitted to the first signal switch, then transmitted to the second signal switch by the first signal switch, and finally transmitted to the loudspeaker by the second signal switch.
As a further description of the public and private network switching and relaying circuit of the intercom terminal of the present invention, preferably, in the working state of the single private network, the sound signal in the Tx transmitting circuit is transmitted to the second signal switch by the microphone, and then transmitted to the private network audio codec by the second signal switch; and the signal of the private network audio coder-decoder in the Rx receiving circuit is transmitted to the second signal switch and then transmitted to the loudspeaker by the second signal switch.
As right intercom terminal public private network switch, relay circuit's further explanation, preferably, change over to private network operating condition at public network, public network audio codec's signal transmission to first signal switch, transmit to second signal switch by first signal switch again, transmit to private network audio codec by second signal switch at last.
As right the public private network of intercom terminal switches, relay circuit's further explanation, preferably, changes over to public network operating condition over to at the private network, private network audio codec transmits to second signal switch, transmits to first signal switch by second signal switch again, transmits to public network audio codec by first signal switch at last.
As a further explanation of the public-private network switching and relaying circuit of the intercom terminal of the present invention, preferably, in the dual-duty working state, the MCU determines the priority levels of the private network and the public network transmission signals according to the set priority of the audio channel, and then controls the signal transmission channels of the first signal switch and the second signal switch; the Tx transmitting circuit and the Rx receiving circuit are selected by hand selection.
As right the public private network of intercom terminal switches, relay circuit's further explanation, preferably, first signal switch and second signal switch adopt the analog switch that the model is SGM 3005. The terminal IN1 and the terminal IN2 IN the SGM3005 respectively control two groups of change-over switches, the terminal COM1 and the terminal COM2 are used for signal input, the terminal NO1 and the terminal NC1 are used for two signal channel outputs, the terminal NO2 and the terminal NC2 are used for two signal outputs, the terminal COM1, the terminal NO1 and the terminal NC1 are same group channels and controlled by the terminal IN1, the terminal COM2, the terminal NO2 and the terminal NC2 are same group channels and controlled by the terminal IN2, and the public network, private network and switching and relaying functions can be realized by two double-switch SGMs 3005.
The utility model has the advantages as follows: the utility model discloses a relay effect is realized to two signal switch, signal transmission channel through two signal switch of MCU control, when judging that the private network signal is good, the communication channel of private network can be put through, get into normal private network mode, when the signal that comes from the private network can't satisfy the communication requirement, will probably select automatic through public network switch-on calling, or through public network, the suggestion user has the calling that comes from the private network, make the intercom terminal of different standards can communicate.
Drawings
Fig. 1 is a block diagram of the public and private network switching and relay circuit of the interphone terminal of the present invention.
Detailed Description
In order to further understand the structure, characteristics and other objects of the present invention, the following detailed description is given with reference to the accompanying preferred embodiments, which are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention.
As shown in fig. 1, fig. 1 is a block diagram of the switching and relay circuit of the public and private networks of the interphone terminal of the present invention; the public and private network switching and relaying circuit of the interphone terminal comprises an MCU1, a first signal switch 2 (SW 1 in FIG. 1), a second signal switch 3 (SW 2 in FIG. 1), a public network audio Codec 4 (Codec 1 in FIG. 1), a private network audio Codec 5 (Codec 2 in FIG. 1), a public network communication module 6 and a private network communication module 7; the MCU1 is respectively and electrically connected with a first signal switch 2 and a second signal switch 3, the first signal switch 2 is respectively and electrically connected with a public network audio codec 4 and a second signal switch 3, the second signal switch 3 is respectively and electrically connected with a private network audio codec 5, a microphone and a loudspeaker, the public network audio codec 4 is electrically connected with a public network communication module 6, and the private network audio codec 5 is electrically connected with a private network communication module 7; the MCU1 controls the signal transmission channels of the first signal switch 2 and the second signal switch 3, so that the interphone transmits or receives signals in the state of single public network work, single private network work, public network switching to private network work, private network switching to public network work or dual watch work. The first signal switch 2 and the second signal switch 3 are analog switches of the type SGM3005, two groups of switches are respectively controlled by an IN1 end and an IN2 end IN the SGM3005, a COM1 end and a COM2 end are used for signal input, an NO1 end and an NC1 end are used for two signal channel outputs, an NO2 end and an NC2 end are used for two signal outputs, the COM1 end, the NO1 end and the NC1 end are IN the same group of channels and controlled by the IN1, the COM2 end, the NO2 end and the NC2 end are IN the same group of channels and controlled by the IN2, and the public network, private network and relay functions can be realized by the two SGM3005 analog switches. The model of the public network audio codec is NAU88C10, the model of the private network audio codec is TI3204, the model of the public network communication module is EC20, and the model of the private network communication module is SCT 3258.
Referring to fig. 1, in the working state of the single public network, the working path (signal transmission channel) of the Tx transmitting circuit is a-B-C, i.e. the sound signal is transmitted from the microphone to the second signal switch 3, then transmitted from the second signal switch 3 to the first signal switch 2, and finally transmitted from the first signal switch 2 to the public network audio codec 4; the working path (signal transmission channel) of the Rx receiving circuit is G-F-H, that is, the signal of the public network audio codec 4 is transmitted to the first signal switch 2, then transmitted to the second signal switch 3 by the first signal switch 2, and finally transmitted to the speaker by the second signal switch 3.
Referring to fig. 1, in the working state of the single private network, the working path (signal transmission channel) of the Tx transmitting circuit is a-D, i.e. the sound signal is transmitted from the microphone to the second signal switch 3, and then transmitted from the second signal switch 3 to the private network audio codec 5; the work path of the Rx receiving circuit is E-H, namely, the signal of the private network audio codec 5 is transmitted to the second signal switch 3 and then transmitted to the loudspeaker by the second signal switch 3.
Referring to fig. 1, when the public network is switched to the private network, the working path (signal transmission channel) of the Rx circuit is G-F-D-E-H, that is, the signal of the public network audio codec 4 is transmitted to the first signal switch 2, then transmitted to the second signal switch 3 by the first signal switch 2, and finally transmitted to the private network audio codec 5 by the second signal switch 3, and the signal entering the private network audio codec 5 is continuously transmitted according to the working path in the single private network working state, so as to implement the relay function.
Referring to fig. 1, when the private network is switched to the public network, the working path (signal transmission channel) of the Rx circuit is E-B-C-G-F-H, i.e. the private network audio codec 5 transmits to the second signal switch 3, then the second signal switch 3 transmits to the first signal switch 2, and finally the first signal switch 2 transmits to the public network audio codec 4, and the signal entering the public network audio codec 4 continues to transmit according to the working path in the single public network working state, so as to implement the relay function.
Under the double waiting working state, the MCU1 judges the priority level of the private network and public network transmission signals according to the set priority level of the audio channel, and then controls the signal transmission channels of the first signal switch 2 and the second signal switch 3; the Tx transmitting circuit and the Rx receiving circuit are selected by hand selection.
It should be noted that the above mentioned embodiments and embodiments are intended to demonstrate the practical application of the technical solution provided by the present invention, and should not be interpreted as limiting the scope of the present invention. Various modifications, equivalent substitutions and improvements will occur to those skilled in the art and are intended to be within the spirit and scope of the present invention. The protection scope of the present invention is subject to the appended claims.
Claims (7)
1. A public and private network switching and relaying circuit of an interphone terminal is characterized in that the public and private network switching and relaying circuit of the interphone terminal comprises an MCU (1), a first signal switch (2), a second signal switch (3), a public network audio codec (4), a private network audio codec (5), a public network communication module (6) and a private network communication module (7); wherein,
The MCU (1) is respectively and electrically connected with a first signal switch (2) and a second signal switch (3), the first signal switch (2) is respectively and electrically connected with a public network audio codec (4) and the second signal switch (3), the second signal switch (3) is respectively and electrically connected with a private network audio codec (5), a microphone and a loudspeaker, the public network audio codec (4) is electrically connected with a public network communication module (6), and the private network audio codec (5) is electrically connected with a private network communication module (7);
The MCU (1) controls the signal transmission channels of the first signal switch (2) and the second signal switch (3) so that the interphone transmits or receives signals under the working states of single public network, single private network, public network switching to private network, private network switching to public network or dual-watch working.
2. The switching and relaying circuit of public/private network for intercom terminal according to claim 1, wherein in the single public network operating state, in the Tx transmitting circuit, the voice signal is transmitted from the microphone to the second signal switch (3), then from the second signal switch (3) to the first signal switch (2), and finally from the first signal switch (2) to the public network audio codec (4); in the Rx receiving circuit, signals of a public network audio coder-decoder (4) are transmitted to a first signal switch (2), then transmitted to a second signal switch (3) through the first signal switch (2), and finally transmitted to the loudspeaker through the second signal switch (3).
3. The switching and relaying circuit of the public/private network of the interphone terminal according to claim 1, wherein in the single/private network operation state, the Tx transmitting circuit transmits the sound signal from the microphone to the second signal switch (3), and then from the second signal switch (3) to the private network audio codec (5); in the Rx receiving circuit, the signal of the private network audio codec (5) is transmitted to the second signal switch (3), and then is transmitted to the loudspeaker by the second signal switch (3).
4. The public and private network switching and relaying circuit of the interphone terminal according to claim 1, wherein when the public network is switched to the private network, the signal of the public network audio codec (4) is transmitted to the first signal switch (2), then transmitted from the first signal switch (2) to the second signal switch (3), and finally transmitted from the second signal switch (3) to the private network audio codec (5).
5. The switching and relaying circuit of the public and private networks of the interphone terminal according to claim 1, wherein when the private network is switched to the public network, the audio codec (5) of the private network is transmitted to the second signal switch (3), then transmitted from the second signal switch (3) to the first signal switch (2), and finally transmitted from the first signal switch (2) to the audio codec (4) of the public network.
6. The interphone terminal public and private network switching and relaying circuit according to claim 1, wherein in the dual watch state, the MCU (1) first determines the priority level of the private network and public network transmission signals according to the set priority of the audio channel, and then controls the signal transmission channels of the first signal switch (2) and the second signal switch (3); the Tx transmitting circuit and the Rx receiving circuit are selected by hand selection.
7. The interphone terminal public and private network switching, relaying circuit according to claim 1, characterized in that the first signal switch (2) and the second signal switch (3) use analog switches of model SGM 3005.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921006753.8U CN209767525U (en) | 2019-07-01 | 2019-07-01 | Public private network switching and relaying circuit for interphone terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921006753.8U CN209767525U (en) | 2019-07-01 | 2019-07-01 | Public private network switching and relaying circuit for interphone terminal |
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| CN209767525U true CN209767525U (en) | 2019-12-10 |
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| CN201921006753.8U Active CN209767525U (en) | 2019-07-01 | 2019-07-01 | Public private network switching and relaying circuit for interphone terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110166076A (en) * | 2019-07-01 | 2019-08-23 | 泉州市顺风耳电子科技有限公司 | A kind of switching of interphone terminal public affairs private network, repeat circuit |
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2019
- 2019-07-01 CN CN201921006753.8U patent/CN209767525U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110166076A (en) * | 2019-07-01 | 2019-08-23 | 泉州市顺风耳电子科技有限公司 | A kind of switching of interphone terminal public affairs private network, repeat circuit |
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