CN101183883A - E1/T1 interface of implementing backup using analog switch - Google Patents
E1/T1 interface of implementing backup using analog switch Download PDFInfo
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- CN101183883A CN101183883A CNA2006101387337A CN200610138733A CN101183883A CN 101183883 A CN101183883 A CN 101183883A CN A2006101387337 A CNA2006101387337 A CN A2006101387337A CN 200610138733 A CN200610138733 A CN 200610138733A CN 101183883 A CN101183883 A CN 101183883A
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Abstract
The invention discloses an E1/T1 interface for backup via a plurality of analog switches, belonging to the interface for backup in communication equipment, which aims to realize the backup of the E1/T1 interface business in transmission system, comprising a master business processing unit, a standby business processing unit and an interface unit; wherein, the master business processing unit and the standby business processing unit are mutual master and standby, and are used for processing the E1/T1 business and outputting analog signals; the interface unit is used to control each analog signal line of the interface unit to be gating connected with the corresponding analog signal line of the master business processing unit or the standby business processing unit being used via the analog switches according to the master and standby switching control signal. The invention has an advantage of suitability for the transmission system of communication field.
Description
Technical field
The present invention relates to E1/T1 in the communication apparatus (DS1) interface, relate in particular to the transmission field related system and adopt analog switch to realize E1/T1 (DS1) interface of backup.
Background technology
The E1 interface is a kind of important PDH tributary interface, and speed is 2048kbit/s, is mainly used in areas such as China and Europe; T1 (DS1) interface also is a kind of important PDH tributary interface, and speed is 1544kbit/s, is mainly used in areas such as North America and Japan, and the two all is the main carrier of various basic business transmission.Because particularly there is E1/T1 (DS1) business interface in the existing communication system of historical reasons in the transmission equipment in a large number.The front card subrack design is adopted in traditional design, and therefore provide PDH (PDH (Pseudo-synchronous Digital Hierarchy)) interface that dual mode is arranged: a kind of is that functional unit itself does not directly provide interface, but interface is unified in the mode of outlet on the backboard; Another kind is outlet on the front panel of functional unit.This dual mode realize simple but go out line density less, be difficult for the engineering operation, can't realize the redundancy backup design of business interface.
The design of main flow is to adopt other correspondence of E1/T1 Service Processing Unit to add the interface unit E1/T1 business interface is provided jointly at present.As Fig. 1 or shown in Figure 2.Interface unit provides outlet, outlet method such as outlet or back outlet before can taking.Its shortcoming is not support the backup of E1/T1 business.
Summary of the invention
At above-mentioned defective, technical problem to be solved by this invention provides a kind of E1/T1 Interface that adopts analog switch to realize backup, can realize the backup of E1/T1 Interface business in the transmission system, improve the reliability of E1/T1 Interface in the transmission system and be convenient to maintainability.
For solving the problems of the technologies described above, a kind of E1/T1 Interface that adopts analog switch to realize backup of the technical solution used in the present invention comprises working traffic processing unit, standby Service Processing Unit and interface unit.
Wherein, described working traffic processing unit and standby Service Processing Unit are active and standby each other to be used for the processing of E1/T1 business with relation, the output analog signal; Described interface unit is used for according to active and standby selection control signal, and the gating on every analog signal line controlling this interface unit by analog switch and the working traffic processing unit of current operate as normal or the standby Service Processing Unit between the corresponding analog signal line is connected.
Wherein, described active and standby selection control signal is controlled by the working traffic processing unit or the standby Service Processing Unit of current operate as normal, or is controlled by the control circuit that adds.
Preferably, described analog switch is the single-pole double throw analog switch; The described active and standby selection control signal of selection control termination of this single-pole double throw analog switch.
Preferably, described analog switch is the dpdt double-pole double-throw (DPDT) analog switch; The described active and standby selection control signal of selection control termination of this dpdt double-pole double-throw (DPDT) analog switch.
The analog signal of described working traffic processing unit and standby Service Processing Unit output is exported after through transformer.
Analog signal by the output of described interface unit analog signal line is exported after through transformer.
Adopt interface of the present invention, can carry out the plate level protection of E1/T1 Interface effectively, improve the reliability of E1/T1 Interface and be convenient to and safeguard, improve integrated level, the reduction board power consumption of veneer.
Description of drawings
Fig. 1 is existing a kind of E1/T1 Interface implementation schematic diagram;
Fig. 2 is existing another kind of E1/T1 Interface implementation schematic diagram;
Fig. 3 the present invention is directed to the backup interface scheme schematic diagram that E1/T1 Interface shown in Figure 1 is realized;
Fig. 4 the present invention is directed to the backup interface scheme schematic diagram that E1/T1 Interface shown in Figure 2 is realized;
Fig. 5 is the schematic diagram of analog switch among the present invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described in further detail.
Employing analog switch of the present invention realizes that the E1/T1 Interface of backup consists of the following components: 1, working traffic processing unit; 2, standby Service Processing Unit; 3, interface unit.Wherein: the working traffic processing unit is finished the main processing capacity of E1/T1 business, output simulation E1/T1 signal, two kinds of working traffic cell schematics of Fig. 3 or Fig. 4 are specifically arranged, but Fig. 4 compares basic identical its analog signal and exports after through transformer with Fig. 3, therefore is the three level signal by positive-negative polarity.The function of standby Service Processing Unit, circuit and structure and working traffic processing unit can be identical, and the activestandby state of its work just is set by control signal in use.Interface unit is finished the main analog signal of sending here with, standby Service Processing Unit through the function of analog switch according to the selection output of control signal.
Fig. 3, Fig. 4 are principle schematic of the present invention, have only illustrated a port (receiving end or make a start) of single channel E1/T1 business to adopt analog switch to realize the principle of backup, and be in fact identical with the circuit of finishing masterslave switchover of making a start for receiving end; Identical for the professional interface principle that adopts analog switch to realize backup of the E1/T1 of multichannel.
What provide for the analog switch among Fig. 5 is the schematic diagram of single pass SPDT (Single-Pole Double-Throw single-pole double throw) analog switch, and the present invention also comprises and adopts multichannel SPDT or DPDT (Double Pole Double Throw dpdt double-pole double-throw (DPDT)) analog switch to realize the E1/T1 Interface that backs up.
The principle schematic of analog switch when selecting control end to add suitable control logic (is example with the logic low) at SEL, can make COM end and C termination logical during work as shown in Figure 5; When select control end to add that logic high makes COM end and D termination logical, realizes the function that switch is selected at SEL.
Only be described below in conjunction with Fig. 3 and Fig. 4, but all schemes all are applicable to single channel, multichannel E1/T1 Interface with single channel E1 Interface design example.
According to engineering operating position feedack, it is higher that the E1 interface damages in communication system the fault ratio, and E1 plate spoilage the highest be the digital circuit part, i.e. the part of telecommunication circuit A shown in the figure (Service Processing Unit); And general e1 port quantity cable more, that connect is many, can be very inconvenient by changing veneer in engineering.In order to improve reliability, maintainability, adopt among the present invention that backup mode designs the E1 interface between the plate of business processing unit board, after damaging, working traffic processing unit plate can change professional distribution, system automatically with switching services to standby business processing unit board, improve the stability of system.
Be illustrated with shown in Figure 3 earlier.
As shown in Figure 3, in the present embodiment, adopting analog switch to control every analog signal line on the interface unit and leading the selection between the corresponding analog signal line on usefulness, the standby Service Processing Unit.
When working traffic processing unit operate as normal, standby Service Processing Unit is not worked; The analog signal gating that active and standby selection control signal control interface unit is connected with transformer connects the corresponding analog signal of working traffic processing unit, and disconnects with the corresponding analog signal of standby Service Processing Unit.
When the working traffic processing unit breaks down, standby Service Processing Unit will be worked; The corresponding analog signal of analog signal that active and standby selection control signal control interface unit is connected with transformer and standby Service Processing Unit is connected, and disconnects with the corresponding analog signal of working traffic processing unit.
As seen, circuit shown in Figure 3 can realize that interface unit is connected with the selection of leading between usefulness, the standby Service Processing Unit, thereby realizes the active/standby backup function.
Active and standby selection control signal among Fig. 3 can be to be controlled with, standby Service Processing Unit by main, also can be controlled by other control circuits that add.
Analog switch among Fig. 3 is because be placed on the selection that realizes module by signal between telecommunication circuit A and the transformer, and this analog signal is the signal of single positive polarity, and the characteristic of analog switch need satisfy: interface unit provides input, the output impedance at business interface place to satisfy the requirement of business interface characteristic.
Realization function and Fig. 3 of Fig. 4 are similar, and following difference is just arranged:
Analog switch among Fig. 4 is because be placed on the selection of telecommunication circuit A through the analog signal behind the transformer, and this analog signal is the signal of bipolarity (positive and negative level), so analog switch need select to realize the analog switch that the three level signal break-make of positive-negative polarity is selected.In Fig. 4,, analog switch directly is not connected with external traffic signal, but isolates, prevent strong interference signal damage analog switch through transformer because consider that the E1 interface needs vulnerabilities to jamming such as stronger static, lightning surge.Wherein the characteristic of transformer, analog switch need satisfy: interface unit provides input, the output impedance at business interface place to satisfy the requirement of business interface characteristic.
Claims (6)
1. an E1/T1 Interface that adopts analog switch to realize backup is characterized in that, comprises working traffic processing unit, standby Service Processing Unit and interface unit; Wherein,
Described working traffic processing unit and standby Service Processing Unit are active and standby each other to be used for the processing of E1/T1 business with relation, the output analog signal;
Described interface unit is used for according to active and standby selection control signal, and the gating on every analog signal line controlling this interface unit by analog switch and the working traffic processing unit of current operate as normal or the standby Service Processing Unit between the corresponding analog signal line is connected.
2. employing analog switch according to claim 1 is realized the E1/T1 Interface of backup, it is characterized in that, described active and standby selection control signal is controlled by the working traffic processing unit or the standby Service Processing Unit of current operate as normal, or is controlled by the control circuit that adds.
3. employing analog switch according to claim 2 is realized the E1/T1 Interface of backup, it is characterized in that described analog switch is the single-pole double throw analog switch; The described active and standby selection control signal of selection control termination of this single-pole double throw analog switch.
4. employing analog switch according to claim 2 is realized the E1/T1 Interface of backup, it is characterized in that described analog switch is the dpdt double-pole double-throw (DPDT) analog switch; The described active and standby selection control signal of selection control termination of this dpdt double-pole double-throw (DPDT) analog switch.
5. realize the E1/T1 Interface of backup according to the described employing analog switch of arbitrary claim in the claim 1 to 4, it is characterized in that the analog signal of described working traffic processing unit and the output of standby Service Processing Unit is exported after through transformer.
6. employing analog switch according to claim 5 is realized the E1/T1 Interface of backup, it is characterized in that, the analog signal by described interface unit analog signal line output is exported after through transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101387337A CN101183883A (en) | 2006-11-14 | 2006-11-14 | E1/T1 interface of implementing backup using analog switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101387337A CN101183883A (en) | 2006-11-14 | 2006-11-14 | E1/T1 interface of implementing backup using analog switch |
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| CN101183883A true CN101183883A (en) | 2008-05-21 |
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| CNA2006101387337A Pending CN101183883A (en) | 2006-11-14 | 2006-11-14 | E1/T1 interface of implementing backup using analog switch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997627A (en) * | 2010-11-16 | 2011-03-30 | 中兴通讯股份有限公司 | Apparatus and method for switching interface |
| CN105871614A (en) * | 2016-03-31 | 2016-08-17 | 国网山西省电力公司信息通信分公司 | Protection method and device of board cards in communication device |
| WO2018036264A1 (en) * | 2016-08-23 | 2018-03-01 | 南京南瑞继保电气有限公司 | Direct-current inter-station communication switching method |
-
2006
- 2006-11-14 CN CNA2006101387337A patent/CN101183883A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997627A (en) * | 2010-11-16 | 2011-03-30 | 中兴通讯股份有限公司 | Apparatus and method for switching interface |
| WO2012065450A1 (en) * | 2010-11-16 | 2012-05-24 | 中兴通讯股份有限公司 | Device and method for switching interfaces |
| CN105871614A (en) * | 2016-03-31 | 2016-08-17 | 国网山西省电力公司信息通信分公司 | Protection method and device of board cards in communication device |
| WO2018036264A1 (en) * | 2016-08-23 | 2018-03-01 | 南京南瑞继保电气有限公司 | Direct-current inter-station communication switching method |
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Open date: 20080521 |