CN100583937C - Communication system - Google Patents
Communication system Download PDFInfo
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- CN100583937C CN100583937C CN200410070978A CN200410070978A CN100583937C CN 100583937 C CN100583937 C CN 100583937C CN 200410070978 A CN200410070978 A CN 200410070978A CN 200410070978 A CN200410070978 A CN 200410070978A CN 100583937 C CN100583937 C CN 100583937C
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Abstract
A communication system consists of communication device including information processing unit, voltage circuit interface of communication network, safe and ultra - low voltage circuit interface and insulation coupling unit; as well as telephone terminal device and data terminal device. It features that voltage circuit interface of communication network is directly coupled with information processing unit and safety as well as ultra - low voltage circuit interface is coupled with information processing unit through insulation coupling unit.
Description
Technical field
The present invention relates to network communications technology field, be specifically related to a kind of communication system.
Background technology
Along with development of Communication Technique, the extensive use in communication equipment of microelectric technique and computer technology, all kinds of advanced communication equipments are more and more higher to the requirement of over-voltage and over-current and safeguard measure thereof.Because the harm that thunder and lightning, forceful electric power, static and operation cause on the communications and data circuit transient overvoltage causes takes place often, therefore must take of the harm of suitable safeguard measure to avoid communication equipment, transmission line and related personnel being caused because of overvoltage and the overcurrent that produced.
At present, the switch with feed function is to realize that by a series of ground protection and over-voltage protector equipment itself reaches user of service's safety.Usually the protective earthing of conformance with standard requirement is very expensive, therefore, adopts the safety of coming assurance equipment to use in the following method usually for some TNV-1/TNV-3 circuit arrangements that do not need to have feed:
As shown in Figure 1, SELV (safety extra low voltage) circuit is kept apart with safety isolating transformer or current transformer and supply main with independent winding, such as, MODEM shown in Figure 3 (modulator-demodulator) circuit, communication processing circuit (SELV circuit) and telephony interface (TNV-3) circuit that the RS232 interface will be arranged are isolated by transformer (voice pathway), relay (loop start), optocoupler (ringing-current detection), realization insulation.Dangerous voltage on the telephone wire (TNV-3 circuit) like this, dangerous voltage such as telephone wire and the introducing of AC220V line short, because the insulation of transformer, relay, optocoupler is arranged, can not arrive on the operating circuit of MODEM inside, therefore guaranteed that the operating circuit of MODEM inside is the SELV circuit, with the RS232 interface that this operating circuit directly links to each other also is safe, can not produce danger to the user of service.
And for some communication equipment, such as, radio reception device, the one end is connected with communication network by wireless access or technology such as LAN or WAN, an other end need connect a two wires telephone set or other user terminals that can zoom out, if adopt aforesaid way that the TNV-1/TNV-3 circuit is isolated, can't carry out feed to telephone set or user terminal.
Summary of the invention
The purpose of this invention is to provide a kind of communication system, to solve the safety problem that the existing communication system can not take into account band feed TNV-1/TNV-3 circuit and equipment use.
Technical scheme provided by the invention is as follows:
A kind of communication system comprises: communication equipment, and telephone terminal and the data terminal equipment that links to each other with described communication equipment respectively,
Described communication equipment comprises:
Information processor, communication network potential circuit interface, safety extra low voltage circuit interface and insulation coupling device, wherein,
Described information processing apparatus is changed to the communication network potential circuit, be used to handle signal post and need exchange message, comprise: circuit board, the fixture that is welded in the components and parts on the circuit board and is used for fixing described circuit board and described components and parts, but people's contacting metal surface, described components and parts and described fixture insulate on the described circuit board;
Described communication network potential circuit interface is coupled directly to described information processor, is used to described telephone terminal feed;
Described safety extra low voltage circuit interface is coupled in described information processor by described insulation coupling device, is used for communicating by letter with described data terminal equipment.
Described safety extra low voltage circuit interface is specially:
The RS232 communication interface is used for carrying out serial communication with described data terminal equipment.
Described safety extra low voltage circuit interface is specially:
Network interface is used for described communication equipment access communications network.
Described insulation coupling device is specially: isolating transformer is used for isolating the communication network voltage of described information processor.
Described data terminal equipment is specially: terminal, or digital device, or testing equipment.
The technical scheme that provides by above invention as can be seen, the present invention becomes the TNV circuit with the information processor of communication equipment inside, makes the communication equipment circuit of can externally answering the call that the feed function is provided; And, improved the communication capacity of system by realizing the data communication function of communication equipment and external data terminal equipment with the RS232 of information processor insulation isolation design, network interface etc.Carry out effective insulation processing by the parts and the internal circuit that will can contact with the user of service in the communication equipment, do not need to design the safety that complicated ground connection can guarantee the user of service, reduced the cost of communication equipment.
Description of drawings
Fig. 1 is the communication equipment block diagram that tape insulation is isolated in the prior art;
Fig. 2 is the fundamental diagram of MODEM;
Fig. 3 is the theory diagram of communication system of the present invention;
Fig. 4 is the first embodiment of the present invention;
Fig. 5 is the second embodiment of the present invention.
Embodiment
Core of the present invention is based on the requirement of equipment standard safe in utilization to TNV circuit insulation processing, with in the original communication equipment with the sub-fraction TNV circuit of outside TNV circuit interface, be converted to inner all circuit of communication equipment and be the TNV circuit, SELV circuit interface and device interior operating circuit are done the insulation processing, make it to reach feed and Safety Design requirement.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 3, Fig. 3 is the theory diagram of communication system of the present invention:
This system comprises: communication equipment 30, data terminal equipment 32 and telephone terminal 33, data terminal equipment communicates by different ports and communication equipment respectively with telephone terminal.Outside TNV-1/TNV-3 circuit provides communication network voltage for intrasystem communication equipment.
With existing communication equipment shown in Figure 1 more as can be seen, the information processor 301 of communication equipment inside is TNV (communication network voltage) circuit by original SELV (safety extra low voltage) circuit conversion among the present invention.
This communication equipment externally provides following two class interfaces:
One class is a communication network potential circuit interface 302, is coupled directly to information processor 301, is used for to outside TNV-1/TNV-3 circuit (telephone terminal) feed.
Such as, by telephone interface circuit, answering the call outward for equipment provides feed, finishes functions such as overvoltage monitoring, ringing-current generation and transmission, loop start monitoring, voice signal are handled, dialing detection.
Another kind of is safety extra low voltage circuit interface 303, is coupled in information processor 301 by insulation coupling device 304, is used for communicating by letter with outside SELV circuit (data terminal equipment).
Such as, by RS232 communication interface and external data terminal equipment, such as, personal computer, terminal, digital device and testing equipment etc. realize serial communication; By network interface this communication equipment is inserted in the communication network that needs to use.
Mention above, information processor 301 is the communication network potential circuit, and this device is the operating circuit of communication equipment, finishes all required processing capacities of this equipment and outer equipment exchange information.
According to the difference of communications device functions, this device can have different structures and part, and critical piece has: circuit board, be welded in the components and parts on the circuit board and be used for fixing circuit board and the fixture of components and parts etc.
Because information processor 301 is the communication network potential circuit, when this equipment and external communication network circuit (telephone terminal) when linking to each other, signal during the communication network circuit working (as sound or ring) is superimposed upon galvanic current and presses, its summation will be above safety value, therefore, in order to guarantee equipment user of service's safety, in the present invention, circuit board, components and parts and the fixture in this module adopts different insulation modes and information processor insulation respectively with the part that the user of service can contact.
The mode of insulation can be varied, can take different modes to different parts, position according to actual needs.For example:
1, for PCB (track wiring board) base material, when doing track, circuit board reserves certain distance, effectively insulation between the circuit that guarantees not need to be electrically connected;
2, for be connected across the device that needs in the insulator chain can adopt specialized designs have the insulation isolating power device, such as: between the primary and secondary coil of isolating transformer, between the winding and contact of relay, the driving stage of optocoupler and the conducting utmost point.According to different demands, provide from the functional insulation to the basic insulation, the various demands of reinforced insulation, supplementary insulation.
3, between the components and parts and fixator part and dangerous circuit that the user of service can contact, adopt double insulation or reinforced insulation.
In addition, for further assurance equipment contact personnel's safety, can also be as required, the direct part that contacts that may be subjected to some ectocine and any direction to equipment installs guard shield, protective cover, baffle plate additional, block etc.
With reference to Fig. 4, Fig. 4 is the first embodiment of the present invention:
Wherein, information processor 301 is the communication network potential circuit, have a telephony interface 402 and a RS232 interface 403 simultaneously, telephony interface directly links to each other with the operating circuit information processor of device interior, making telephony interface is the TNV-1/TNV-3 circuit, therefore, this equipment can pass through the external telephone set of this telephony interface, and to the telephone set feed; The RS232 interface is coupled in the operating circuit of device interior by Light Coupled Device 404, makes equipment pass through the RS232 interface and realizes serial communication with extraneous, has guaranteed that simultaneously this interface is the SELV circuit, has guaranteed user of service's safety.Such as, can communicate by this serial ports and computer 42, finish the parameter configuration of this equipment etc. by computer 42.
With reference to Fig. 5, Fig. 5 is the second embodiment of the present invention:
Wherein, information processor 301 is the communication network potential circuit, have a telephony interface 402 and a network interface 503 simultaneously, telephony interface directly links to each other with the operating circuit of device interior, making telephony interface is the TNV-1/TNV-3 circuit, therefore, this equipment can pass through the external telephone set of this telephony interface, and to the telephone set feed; Network interface 503 is coupled in the operating circuit of device interior by isolating transformer 504, makes equipment pass through network interface 503 access to LAN 52, has guaranteed that simultaneously this interface is the SELV circuit, has guaranteed user of service's safety.
In above-mentioned first and second embodiment, because the operating circuit information processing apparatus of device interior is changed to the TNV-1/TNV-3 circuit, therefore, the parts that this equipment and user of service may touch are all made corresponding insulation such as the screw of fixing circuit board, device housings etc. and are handled.
Above in conjunction with the accompanying drawings 4 and accompanying drawing 5 illustrated embodiments the present invention is described in detail, should be understood that can be in conjunction with forming additional embodiments by the element of replacing among each embodiment.Its principle is similar, does not repeat them here.
Though reaching embodiment above in conjunction with the accompanying drawings describes in detail the present invention, those of ordinary skills know, the present invention has many distortion and variation and does not break away from spirit of the present invention, wishes that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (5)
1, a kind of communication system comprises: communication equipment, and telephone terminal and the data terminal equipment that links to each other with described communication equipment is characterized in that respectively, described communication equipment comprises:
Information processor, communication network potential circuit interface, safety extra low voltage circuit interface and insulation coupling device, wherein,
Described information processing apparatus is changed to the communication network potential circuit, be used to handle signal post and need exchange message, comprise: circuit board, the fixture that is welded in the components and parts on the circuit board and is used for fixing described circuit board and described components and parts, but people's contacting metal surface, described components and parts and described fixture insulate on the described circuit board;
Described communication network potential circuit interface is coupled directly to described information processor, is used to described telephone terminal feed;
Described safety extra low voltage circuit interface is coupled in described information processor by described insulation coupling device, is used for communicating by letter with described data terminal equipment.
2, communication system according to claim 1 is characterized in that, described safety extra low voltage circuit interface is specially:
The RS232 communication interface is used for carrying out serial communication with described data terminal equipment.
3, communication system according to claim 1 is characterized in that, described safety extra low voltage circuit interface is specially:
Network interface is used for described communication equipment access communications network.
4, communication system according to claim 1 is characterized in that, described insulation coupling device is specially: isolating transformer is used for isolating the communication network voltage of described information processor.
5, communication system according to claim 1 is characterized in that, described data terminal equipment is specially: terminal, or digital device, or testing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410070978A CN100583937C (en) | 2004-07-21 | 2004-07-21 | Communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410070978A CN100583937C (en) | 2004-07-21 | 2004-07-21 | Communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1725796A CN1725796A (en) | 2006-01-25 |
| CN100583937C true CN100583937C (en) | 2010-01-20 |
Family
ID=35925030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200410070978A Expired - Fee Related CN100583937C (en) | 2004-07-21 | 2004-07-21 | Communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100583937C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195283B (en) * | 2010-03-03 | 2015-02-25 | 华为终端有限公司 | Terminal product and safety protection method thereof |
| CN102595815B (en) * | 2012-02-16 | 2015-09-09 | 华为技术有限公司 | One exempts from ground networks punch-out equipment cabinet |
| CN102681122B (en) * | 2012-05-23 | 2014-05-07 | 华为技术有限公司 | Fiber-to-building equipment |
| CN110601770B (en) * | 2019-09-19 | 2021-02-09 | 广东美的制冷设备有限公司 | Electric control insulation circuit and electric control converter |
-
2004
- 2004-07-21 CN CN200410070978A patent/CN100583937C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 微型计算机中的TNV电路及涉及的安全. 于洋.安全与电磁兼容. 2001 |
| 微型计算机中的TNV电路及涉及的安全. 于洋.安全与电磁兼容. 2001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1725796A (en) | 2006-01-25 |
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Granted publication date: 20100120 Termination date: 20160721 |