CN2631136Y - Dual-network selector - Google Patents
Dual-network selector Download PDFInfo
- Publication number
- CN2631136Y CN2631136Y CN 03232441 CN03232441U CN2631136Y CN 2631136 Y CN2631136 Y CN 2631136Y CN 03232441 CN03232441 CN 03232441 CN 03232441 U CN03232441 U CN 03232441U CN 2631136 Y CN2631136 Y CN 2631136Y
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- China
- Prior art keywords
- circuit
- audio signal
- double
- busy
- single chip
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- Expired - Fee Related
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Abstract
A dual-network selector of the utility model includes an enable circuit for the first and the second lines, a detecting circuit for the first and the second ring, a pick-detecting circuit, a decoding circuit of dual audio signal, a code transmitting circuit, a line switching circuit, an indicator circuit and a single chip microcomputer control circuit. Under the control of single chip controlling circuit and by the line switching circuit, the selector can automatically switches the telephone lines among the telecommunications Network Interface lines and special lines or IP network interface lines in the condition of not changing the users' dialing habits. With the simple structure, the utility model can not only save telephone money of the users, but also expand the market for operators.
Description
Technical field
The utility model relates to the dual network selector that is used for communication.
Background technology
Present telephonic communication all is single network communication, and it comprises that circuit makes busy circuit, ring detecting circuit, off-hook detection circuit, double-audio signal decoding circuit, double-audio signal signaling circuit and single chip machine controlling circuit.The special line that some operators such as Netcom, Tie Tong release can only be made long-distance call, does not but make local telephone network, its long-distance telephone bill than original telecommunications long-distance telephone bill with relatively cheap.And the user considers the saving of telephone expenses, not only wish to beat the local telephone network of telecommunications but also can beat these relatively inexpensive long-distance call special lines, but existing single network telephone communication can't be implemented under the situation that does not change the subscriber dialing custom, and the local telephone network that can beat telecommunications can be made the long-distance call of special line again.
Summary of the invention
The purpose of this utility model provides a kind of dual network selector, and its phone networking of automaticallying switch makes the user under the situation that does not change the dialing custom, can make the telecommunications local telephone network and can make the special line long-distance call again.
Dual network selector of the present utility model comprises that first circuit makes busy circuit, second circuit makes busy circuit, first ring detecting circuit, second ring detecting circuit, the off-hook detection circuit, the double-audio signal decoding circuit, double-audio signal signaling circuit, the circuit commutation circuit, indicator light circuit and single chip machine controlling circuit, the end that first circuit makes busy circuit links to each other with first output of an end of first ring detecting circuit and circuit commutation circuit and connects the telecommunications network interface altogether, second circuit makes an end of busy circuit and an end of second ring detecting circuit, one end of double-audio signal signaling circuit and second output of circuit commutation circuit link to each other and connect special line or IP network interface altogether, one end of off-hook detection circuit links to each other with the input of an end of double-audio signal decoding circuit and circuit commutation circuit and connects the subscriber phone interface altogether, first circuit makes the other end of busy circuit, second circuit makes the other end of busy circuit and the other end of double-audio signal signaling circuit link to each other with the output of single chip machine controlling circuit, the other end of first ring detecting circuit, the other end of second ring detecting circuit, the other end of the other end of off-hook detection circuit and double-audio signal decoding circuit links to each other with the input of single chip machine controlling circuit, the control end of circuit commutation circuit links to each other with the output of single chip machine controlling circuit, and indicator light circuit links to each other with single chip machine controlling circuit.
The advantage of dual network selector of the present utility model: simple in structure, and under the prerequisite that does not change the subscriber dialing custom, can realize the handoff functionality between telecommunication line and special line or the IP network circuit automatically,, and enlarge market for operator not only for the user has economized telephone charges.
Description of drawings
Fig. 1 is a dual network selector forming circuit schematic diagram of the present utility model.
Embodiment
With reference to Fig. 1, dual network selector of the present utility model, comprise that first circuit makes busy circuit 5.1, second circuit makes busy circuit 5.2, first ring detecting circuit 1.1, second ring detecting circuit 1.2, off-hook detection circuit 2, double-audio signal decoding circuit 3, double-audio signal signaling circuit 4, circuit commutation circuit 6, indicator light circuit 7 and single chip machine controlling circuit 8, the end that first circuit makes busy circuit 5.1 links to each other with first output of an end of first ring detecting circuit 1.1 and circuit commutation circuit 6 and connects telecommunications network interface 9 altogether, second circuit makes an end of busy circuit 5.2 and an end of second ring detecting circuit 1.2, one end of double-audio signal signaling circuit 4 and second output of circuit commutation circuit 6 link to each other and connect special line or IP network interface 10 altogether, one end of off-hook detection circuit 2 links to each other with the input of an end of double-audio signal decoding circuit 3 and circuit commutation circuit 6 and connects subscriber phone interface 11 altogether, first circuit makes the other end of busy circuit 5.1, second circuit makes the other end of busy circuit 5.2 and the other end of double-audio signal signaling circuit 4 link to each other with the output of single chip machine controlling circuit 8, the other end of first ring detecting circuit 1.1, the other end of second ring detecting circuit 1.2, the other end of the other end of off-hook detection circuit 2 and double-audio signal decoding circuit 3 links to each other with the input of single chip machine controlling circuit 8, the control end of circuit commutation circuit 6 links to each other with the output of single chip machine controlling circuit 8, and indicator light circuit 7 links to each other with single chip machine controlling circuit 8.
Above-mentioned double-audio signal decoding circuit 3 can adopt the CM8870/MT8870 chip, and double-audio signal signaling circuit 4 can be the HT9200 chip.Single chip machine controlling circuit 8 can adopt the AT89C2051 chip, and circuit commutation circuit 6 can adopt general relay,
Its course of work is described below: when the user makes a phone call by subscriber phone interface 11 as the calling party, behind the phone off-hook, this moment, off-hook detection circuit 2 output off hook signals were input to single-chip microcomputer, notice single-chip microcomputer user is off-hook, single-chip microcomputer begins to detect whether the output signal of decoding circuit 3 is long-distance call then, if long-distance call, then single-chip microcomputer is talked about first figure place of number simultaneously for generating to special line or IP network interface by signaling circuit 4, then the subscriber phone interface circuit is switched on special line or the IP network interface circuit after distributing by circuit commutation circuit 6, it is busy by second busy circuit 5.2 to be put the telecommunications network interface circuit after switching is finished, simultaneously by indicator light circuit 7 indication telecommunication interface line be busies; Otherwise if dial the number then makes busy circuit 5.2 put special line or IP network interface circuit busy, busy by indicator light circuit 7 indication special lines or IP network interface circuit simultaneously by second for local telephone network.When the user receives calls with the callee, single-chip microcomputer is by first, which second ring detecting circuit 1 detects and squeezes into, if the words of squeezing into by telecommunication line 9, then single-chip microcomputer switches to the telecommunication interface circuit by circuit commutation circuit 6, after switching is finished, make busy circuit 5.2 put special line or IP network interface circuit busy by second, indicate special line or IP network interface circuit to hurry by indicator light circuit 7 simultaneously, otherwise when phone when special line or IP network line interface 10 are squeezed into, then single-chip microcomputer switches to special line or IP network line interface circuit by circuit commutation circuit 6, after switching is finished, it is busy by first busy circuit 5.1 to be put the telecommunication interface circuit, indicates the telecommunication interface line be busy by indicator light circuit 7 simultaneously.Thereby realize the automatic switching function between telecommunication line and special line or the IP network circuit.
Claims (3)
1. dual network selector, comprise that first circuit makes busy circuit (5.1), first ring detecting circuit (1.1), off-hook detection circuit (2), double-audio signal decoding circuit (3), double-audio signal signaling circuit (4) and single chip machine controlling circuit (8), it is characterized in that also comprising that second circuit makes busy circuit (5.2), second ring detecting circuit (1.2), circuit commutation circuit (6), indicator light circuit (7), the end that first circuit makes busy circuit (5.1) links to each other with first output of an end of first ring detecting circuit (1.1) and circuit commutation circuit (6) and connects telecommunications network interface (9) altogether, second circuit makes an end of busy circuit (5.2) and an end of second ring detecting circuit (1.2), second output of one end of double-audio signal signaling circuit (4) and circuit commutation circuit (6) links to each other and connects special line or IP network interface (10) altogether, one end of one end of off-hook detection circuit (2) and double-audio signal decoding circuit (3) and the input of circuit commutation circuit (6) link to each other and connect subscriber phone interface (11) altogether, first circuit makes the other end of busy circuit (5.1), second circuit makes the other end of busy circuit (5.2) and the other end of double-audio signal signaling circuit (4) link to each other with the output of single chip machine controlling circuit (8), the other end of first ring detecting circuit (1.1), the other end of second ring detecting circuit (1.2), the other end of the other end of off-hook detection circuit (2) and double-audio signal decoding circuit (3) links to each other with the input of single chip machine controlling circuit (8), the control end of circuit commutation circuit (6) links to each other with the output of single chip machine controlling circuit (8), and indicator light circuit (7) links to each other with single chip machine controlling circuit (8).
2. dual network selector according to claim 1 is characterized in that said double-audio signal decoding circuit (3) is the CM8870/MT8870 chip.
3. dual network selector according to claim 1 is characterized in that said double-audio signal signaling circuit (4) is the HT9200 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03232441 CN2631136Y (en) | 2003-06-20 | 2003-06-20 | Dual-network selector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03232441 CN2631136Y (en) | 2003-06-20 | 2003-06-20 | Dual-network selector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2631136Y true CN2631136Y (en) | 2004-08-04 |
Family
ID=34291452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03232441 Expired - Fee Related CN2631136Y (en) | 2003-06-20 | 2003-06-20 | Dual-network selector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2631136Y (en) |
-
2003
- 2003-06-20 CN CN 03232441 patent/CN2631136Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040804 Termination date: 20100620 |