CN1661937A - E1/T1 interface for implementing backup through using relay - Google Patents
E1/T1 interface for implementing backup through using relay Download PDFInfo
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- CN1661937A CN1661937A CN 200410007592 CN200410007592A CN1661937A CN 1661937 A CN1661937 A CN 1661937A CN 200410007592 CN200410007592 CN 200410007592 CN 200410007592 A CN200410007592 A CN 200410007592A CN 1661937 A CN1661937 A CN 1661937A
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Abstract
Comparing with prior art, the invention separates analog part of El /Tl interface from its digital part. Thus, digital part and active circuit are integrated on front plug-in board, and analog part and passive circuit are integrated on back plug-in board. Moreover, the invention supports backup for El /Tl interface. Once main front plug-in board of interface is in failure, standby front plug-in board is put into operation automatically so as to enhance reliability of interface and raise stability of system. Usually, back plug-in board is not easy to be damaged so that bound cables will not be influenced. The invention possesses advantages of raised performance for anti lightning strike, preventing event of system down.
Description
Technical field
The present invention relates to be used for the E1/T1 Interface (expression E1 interface or T1 interface) of the communications field, more particularly, relate to a kind of E1/T1 Interface that adopts relay to realize backup.
Background technology
E1 and T1 are respectively the abbreviations to three kinds of different systems PCM30, PCM24 of basic group in PCM (pulse code modulation) digital system.Wherein, the nominal rate of E1 is 2048kbit/s, and the nominal rate of T1 is 1544kbit/s, and detailed definition can be with reference to ITU-T standard G.703/G.704.
In traditional design, adopt the subrack design of inserting before being applicable to, and the numerical portion and the modulus part of E1 or T1 interface all is integrated on the veneer.Veneer itself is outgoing interface not, but interface is placed on the backboard, and adopts the SMB outlet method.This is a kind of comparatively ancient outlet method, no longer adopts in general new product; Its shortcoming is can't intensive outlet, does not analog-and digital-ly separate, and does not support the E1/T1 Interface backup.
In a kind of comparatively novel outlet method that more generally adopts at present, the numerical portion of E1/T1 Interface and modulus part all are integrated on the veneer.Outgoing interface on the panel of veneer, outlet method is a lot, can adopt the SMB outlet method, also can adopt outlet methods such as DB100, DB50, DB25.Insert before being applicable to or the slotting subrack design in front and back.The shortcoming of this outlet method is that its simulation part is not separated with numerical portion, and does not support the E1/T1 Interface backup.
Summary of the invention
At the above-mentioned defective of prior art, the present invention will solve the E1/T1 Interface backup is not separated and do not supported to the simulation part that has E1/T1 Interface now with numerical portion problem.
For solving its technical problem, the invention provides a kind of E1/T1 Interface that adopts relay to realize backup, wherein, the numeral of described E1/T1 Interface, active circuit are integrated on the front card, and simulation, passive circuit then are integrated on the back card/back board; Described front card comprises can realize identical function, active and standby master with relation uses front card and standby front card each other; At each the root analog signal line that needs on the described back card/back board to be connected with front card, being respectively equipped with one can optionally use the analog signal line of back card/back board and current operate as normal main or the analog signal selection circuit of the corresponding analog signal line connection of standby front card by relay.
Among the present invention, also be provided with can according to current operate as normal main with or the control signal exported of standby front card, relay in described analog signal selection circuit send the control Driver Circuit of controlling and driving signal.During specific design, described analog signal selection circuit is located on the described back card/back board; Described control Driver Circuit comprises main control Driver Circuit and the standby control Driver Circuit used, and primary, spare control Driver Circuit can be located on the described back card/back board simultaneously, also can be located at main with on front card and the standby front card respectively.Can adopt triode, metal-oxide-semiconductor or Darlington transistor as driver in the described primary, spare control Driver Circuit.
In a preferred version of the present invention, described relay adopts solid-state relay, each root analog signal line of described back card/back board is connected to active/standby corresponding analog signal line with front card by an active/standby pair of contact with solid-state relay at least, and the control end of the solid-state device that continues of described active/standby usefulness is connected to described active/standby output with control Driver Circuit.The control signal that described master exports with front card is connected to the base stage of a triode Q1, and the emitter of triode Q1 is to main control end output controlling and driving signal with solid-state relay; The control signal of described standby front card output is connected to the base stage of another triode Q2, and the emitter of triode Q2 is to the control end output controlling and driving signal of standby solid-state relay.
In another preferred version of the present invention, described relay adopts time pulse relay, each root analog signal line of described back card/back board is connected to active/standby corresponding analog signal line with front card by an active/standby pair of contact with time pulse relay at least, describedly active/standbyly is connected to described active/standby output with control Driver Circuit with the continue control end of device of pulse.Also can adopt the time pulse relay that to accept positive and negative pulse simultaneously as a primary, spare time pulse relay of analog signal line; The controlling and driving holding wire of described primary, spare control Driver Circuit is connected with the control end of described time pulse relay by opposite direction; The corresponding analog signal line of described primary, spare front card is connected respectively to the forward and reverse input contact of described time pulse relay, and is connected to corresponding analog signal line on the back card/back board through same output contact.
The present invention is to the numeral of easy damage, active part adopt backup scenario in E1 or the T1 interface, in case the master of E1 interface damages with front card, its standby front card can be devoted oneself to work automatically, thereby has strengthened the reliability of E1 interface, has promoted the stability of system greatly.Because the design philosophy that has adopted modulus to separate, passive devices such as protection device, transformer are placed on the back card/back board, generally can not damage, so back card/back board generally need not change, and only need to change front card, so the cable of tying up can be not influenced.In addition, this active and standby mode with automatic switchover improves the anti-thunderbolt performance of whole E1 interface greatly, has avoided major accidents such as paralysed machine, has reduced maintenance cost simultaneously.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the catenation principle figure between primary, spare front card and the monolithic back card/back board among the present invention;
Fig. 2 is the catenation principle figure between primary, spare front card and two back card/back boards among the present invention;
Fig. 3 is the schematic diagram of solid-state relay used in the embodiment of the invention one;
Fig. 4 is the analog signal line annexation schematic diagram between primary, spare front card and the back card/back board in the embodiment of the invention one;
Fig. 5 is the control signal wire annexation schematic diagram between primary, spare front card and the back card/back board in the embodiment of the invention one;
Fig. 6 is the schematic diagram of time pulse relay used in the embodiment of the invention two;
Fig. 7 is the analog signal line annexation schematic diagram between primary, spare front card and the back card/back board in the embodiment of the invention two;
Fig. 8 is the control signal wire annexation schematic diagram between primary, spare front card and the back card/back board in the embodiment of the invention two.
Embodiment
For ease of describing, below only be that example describes, but all schemes are all applicable to the T1 interface with E1.
According to the information of Market Feedback, the E1 interface damages and belongs to one of ratio soprano in the single board default.Because the E1 interface damages, and not only needs to spend a large amount of maintenance costs, even bring great accident may for office side.If there is veneer to damage, general treating method is to change plate, but changing plate must influence the E1 cable of having tied up, and all is inadvisable from engineering and reliability angle.
For improving its reliability, adopt among the present invention that mutually redundant mode designs the E1 interface between plate, in case certain piece E1 interface single plate damages, do not change under the prerequisite of distribution in assurance, system can be with E1 interface auto switching to standby interface single plate, thereby strengthen the reliability of E1 interface, greatly the stability of elevator system.
For the E1 interface, what spoilage was the highest is the numerical portion of interface, and the bad rate that passive devices such as transformer, protection device decrease is much smaller relatively.So, the theory that the present invention separates according to modulus, the E1 interface is divided into two parts, as shown in Figure 1, wherein numeral, active part are integrated into front card, and simulation, passive part then are integrated into back card/back board, and only numeral, active part are established primary and backup veneer, that is to say, be provided with a main front card 11 and the standby front card 12 used.The circuit of primary, spare front card and structure all are identical, can finish identical functions, but in use by corresponding setting and active and standby each other with relation, that is to say that arbitrary in two front cards can be as main usefulness, and another piece is then as standby.Be main with front card 11 work under the normal condition, standby front card 12 is not worked; When the master is broken down with front card, just replace its work by standby front card.During specific design, can primary, spare front card be set by toggle switch or alternate manner separately, and start or stop the work of standby front card by interconnective holding wire, as shown in Figure 5, when the master is broken down with front card 11, to send a corresponding active and standby signal to standby front card 12, standby front card is started working; Recover just often with front card 11 when main, will send a corresponding active and standby signal, standby front card is quit work to standby front card 12.
As for back card/back board, as shown in Figure 1, simulation, active part can be integrated on the same veneer, promptly have only a back card/back board 2.For with the respective outer side edges of two front cards 11,12, also simulation, passive part can be located at respectively on two back card/back boards 21,22, as shown in Figure 2, but this is a kind of physical division of back card/back board, not active and standby between two back card/back boards 21,22, but work simultaneously to finish a total function with relation.
As can be seen, the connecting line between primary, spare front card and the back card/back board comprises the analog signal line (i.e. two-way hollow arrow line among the figure) of E1 interface and is used for realizing the control signal wire (i.e. the unidirectional filled arrows line of figure) of primary, spare selection from Fig. 1 and Fig. 2.
Wherein, E1 interface analog signal line is provided to back card/back board respectively by primary, spare front card: if between front card and the back card/back board N road E1 interface is arranged, then need 4*N bar line; Correspondingly, every back card/back board is connected with primary, spare two front cards respectively, supports 2*N road E1 interface, needs 8*N bar line.
Control signal wire is also provided to back card/back board respectively by primary, spare front card, specifically is that front card by current operate as normal provides control signal to back card/back board, with the master that selects to connect current operate as normal with front card or standby front card.The quantity of control signal wire is different and different according to design.
Among the present invention, needing control signal wire to select the E1 interface analog signal line of corresponding front card, is the HDB3 sign indicating number because E1 interface analog signal line walks, and common selector can't satisfy its functional requirement.Use solid-state relay or pulse relay road as selector switch among the present invention, describe respectively below in conjunction with specific embodiment.
One, adopt solid-state relay to realize backup
The theory structure of solid-state relay as long as add certain controlling and driving signal at A, B end, just can be controlled " leading to " and " breaking " between C, the D two ends during work as shown in Figure 3, realizes the function that switch is selected; Because the application of optical coupler, the required power of its control signal extremely low (but surplus in the of about ten milliwatt just operate as normal).
1, E1 interface analog signal line
As shown in Figure 4, in the present embodiment, adopting solid-state relay to control the break-make between the corresponding analog signal line on the front card each root analog signal line and primary, spare on the back card/back board 2.
When the master used front card 11 operate as normal, standby front card 12 was not worked, and main control signal with front card 11 outputs makes relay J 11, J12 closure; Standby front card 12 is not exported control signal, or the output control signal disconnects relay J 21, J22.Thereby make main analog signal form a loop, thereby the analog signal line of back card/back board 2 is connected with main corresponding analog signal line with front card 11 through J11, T1, J12 with front card.
When the master is broken down with front card 11, will devote oneself to work by standby front card 12, the control signal of standby front card 12 outputs makes relay J 21, J22 closure; The master does not export control signal with front card 11, or the output control signal disconnects relay J 11, J12.Thereby make the analog signal of standby front card form a loop, thereby the analog signal line of back card/back board 2 and the corresponding analog signal line of standby front card 12 are connected through J21, T1, J22.
As seen, active and standby selection circuit shown in Figure 4 can realize that back card/back board 2 is connected with selection between the primary, spare front card 11,12.What illustrate among the figure is the schematic diagram that single channel E1 receives (perhaps sending) holding wire, needs 4 solid-state relays altogether.
2, control signal wire
In the present embodiment, control signal adopts the triode drive scheme, and the triode driver is placed on the front card.As shown in Figure 5, because the driving force of triode is relatively large, an available triode drives a plurality of solid-state relays.This programme is fit to the various density outlet schemes of E1 interface.
When the master used front card 11 operate as normal, main control signal with front card 11 outputs made triode Q1 conducting, drives relay J 11, J12 closure again; This moment, standby front card 12 was not worked, and relay J 21, J22 are off-state.
When the master is broken down with front card 11, will devote oneself to work by standby front card 12, the control signal of standby front card 12 outputs makes triode Q2 conducting, drives relay J 21, J22 closure again; Relay J 11, J12 are off-state at this moment.
In addition, the driver among Fig. 5 can be selected common triode driver for use, also can select for use metal-oxide-semiconductor, Darlington transistor etc. as driver; And, also driver can be placed on the back card/back board.
Two, adopt time pulse relay to realize backup
The theory structure of used time pulse relay when when A, B end adds a direct impulse controlling and driving signal, can make between C11 and D1, C12 and the D2 and connect as shown in Figure 6 in the present embodiment; When A, B end adds a reverse impulse controlling and driving signal, can make between C21 and D1, C22 and the D2 and connect, realize the function that switch is selected.
1, E1 interface analog signal line
As shown in Figure 7 and Figure 8, in the present embodiment, adopting time pulse relay to control the break-make between the corresponding analog signal line on the front card each root analog signal line and primary, spare on the back card/back board 2.
When the master used front card 11 operate as normal, standby front card 12 was not worked, and main direct impulse control signal with front card 11 outputs makes between C11 and D1, C12 and the D2 to be connected; Thereby the analog signal line of back card/back board 2 is connected with main corresponding analog signal line with front card 11.
When the master is broken down with front card 11, will devote oneself to work by standby front card 12, the reflected impulse control signal of standby front card 12 outputs makes between C21 and D1, C22 and the D2 to be connected; Thereby the analog signal line of back card/back board 2 and the corresponding analog signal line of standby front card 12 are connected.
As seen, active and standby selection circuit shown in Figure 7 can realize that back card/back board 2 is connected with selection between the primary, spare front card 11,12.
2, control signal wire
In the present embodiment, control signal adopts the triode drive scheme, and the triode driver is placed on the front card.As shown in Figure 5, because the driving force of triode is relatively large, available a pair of triode drives a plurality of time pulse relays.This programme is fit to the various density outlet schemes of E1 interface.
When the master used front card 11 operate as normal, main control signal with front card 11 outputs made triode Q11, Q12 conducting, thereby to time pulse relay output direct impulse controlling and driving signal, made between C11 and D1, C12 and the D2 and connect.
When the master is broken down with front card 11, to devote oneself to work by standby front card 12, the control signal of standby front card 12 outputs makes triode Q21, Q22 conducting, thereby to time pulse relay output reverse impulse controlling and driving signal, makes between C21 and D1, C22 and the D2 and connect.
In addition, the driver among Fig. 8 can be selected common triode driver for use, also can select for use metal-oxide-semiconductor, Darlington transistor etc. as driver; And, also driver can be placed on the back card/back board.
Claims (9)
1, a kind of E1/T1 Interface that adopts relay to realize backup is characterized in that,
The numeral of described E1/T1 Interface, active circuit are integrated on the front card, and simulation, passive circuit then are integrated on the back card/back board;
Described front card comprises can realize identical function, active and standby master with relation uses front card and standby front card each other;
Wherein, at each the root analog signal line that needs on the described back card/back board to be connected with front card, being respectively equipped with one can optionally use the analog signal line of back card/back board and current operate as normal main or the analog signal selection circuit of the corresponding analog signal line connection of standby front card by relay.
2, employing relay according to claim 1 is realized the E1/T1 Interface of backup, it is characterized in that, wherein also be provided with can according to current operate as normal main with or the control signal exported of standby front card, relay in described analog signal selection circuit send the control Driver Circuit of controlling and driving signal.
3, employing relay according to claim 2 is realized the E1/T1 Interface of backup, it is characterized in that described analog signal selection circuit is located on the described back card/back board, and described control Driver Circuit comprises main with control Driver Circuit and standby control Driver Circuit.
4, employing relay according to claim 3 is realized the E1/T1 Interface of backup, it is characterized in that described primary, spare control Driver Circuit can be located on the described back card/back board simultaneously, also can be located at main with on front card and the standby front card respectively.
5, employing relay according to claim 4 is realized the E1/T1 Interface of backup, it is characterized in that, adopts triode, metal-oxide-semiconductor or Darlington transistor as driver in the described primary, spare control Driver Circuit.
6, according to the E1/T1 Interface of claim 4 or 5 described employing relays realization backups, it is characterized in that described relay is a solid-state relay,
Each root analog signal line of described back card/back board is connected to main corresponding analog signal line with front card by a master with the pair of contact of solid-state relay at least, and described main control end with the solid-state device that continues is connected to the described main output of using control Driver Circuit;
Each root analog signal line of described back card/back board is connected to the corresponding analog signal line of standby front card at least by the pair of contact of a standby solid-state relay, the control end of the described standby solid-state device that continues is connected to the output of described standby control Driver Circuit.
7, employing relay according to claim 6 is realized the E1/T1 Interface of backup, it is characterized in that, the control signal that described master exports with front card is connected to the base stage of a triode driver Q1, and the emitter of triode Q1 is to main control end output controlling and driving signal with solid-state relay; The control signal of described standby front card output is connected to the base stage of another triode driver Q2, and the emitter of triode Q2 is to the control end output controlling and driving signal of standby solid-state relay.
8, employing relay according to claim 4 is realized the E1/T1 Interface of backup, it is characterized in that described relay is a time pulse relay,
Each root analog signal line of described back card/back board is connected to main corresponding analog signal line with front card by a master with the pair of contact of time pulse relay at least, and described master is connected to described main output with control Driver Circuit with the continue control end of device of pulse;
Each root analog signal line of described back card/back board is connected to the corresponding analog signal line of standby front card at least by the pair of contact of a standby time pulse relay, the continue control end of device of described standby pulse is connected to the output of described standby control Driver Circuit.
9, employing relay according to claim 8 is realized the E1/T1 Interface of backup, it is characterized in that, at each root analog signal line of described back card/back board, adopt the time pulse relay that to accept positive and negative pulse simultaneously as a primary, spare time pulse relay of analog signal line;
The controlling and driving holding wire of described primary, spare control Driver Circuit is connected with the control end of described time pulse relay by opposite direction; The corresponding analog signal line of described primary, spare front card is connected respectively to the forward and reverse input contact of described time pulse relay, and is connected to corresponding analog signal line on the back card/back board through same output contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100075926A CN100372251C (en) | 2004-02-25 | 2004-02-25 | E1/T1 interface for implementing backup through using relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100075926A CN100372251C (en) | 2004-02-25 | 2004-02-25 | E1/T1 interface for implementing backup through using relay |
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| Publication Number | Publication Date |
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| CN1661937A true CN1661937A (en) | 2005-08-31 |
| CN100372251C CN100372251C (en) | 2008-02-27 |
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| CNB2004100075926A Expired - Fee Related CN100372251C (en) | 2004-02-25 | 2004-02-25 | E1/T1 interface for implementing backup through using relay |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008011835A1 (en) * | 2006-07-21 | 2008-01-31 | Huawei Technologies Co., Ltd. | A device and method of implementing backup for e1/t1 interface |
| CN100440845C (en) * | 2006-05-26 | 2008-12-03 | 华为技术有限公司 | Method and system for reversing main-equipment with interconnected single-board |
| CN101146144B (en) * | 2007-10-11 | 2010-06-23 | 中兴通讯股份有限公司 | E1/T1 interface circuit and E1/T1 interface circuit device with master/slave structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4328577A (en) * | 1980-06-03 | 1982-05-04 | Rockwell International Corporation | Muldem automatically adjusting to system expansion and contraction |
| DE10011268B4 (en) * | 2000-03-08 | 2011-05-19 | Tenovis Gmbh & Co. Kg | switch |
| CA2357913A1 (en) * | 2001-09-27 | 2003-03-27 | Alcatel Canada Inc. | System for providing fabric activity switch control in a communications system |
| CN2517181Y (en) * | 2001-11-27 | 2002-10-16 | 北京格林威尔科技发展有限公司 | Optical transmission device with multi-data interface |
-
2004
- 2004-02-25 CN CNB2004100075926A patent/CN100372251C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440845C (en) * | 2006-05-26 | 2008-12-03 | 华为技术有限公司 | Method and system for reversing main-equipment with interconnected single-board |
| WO2008011835A1 (en) * | 2006-07-21 | 2008-01-31 | Huawei Technologies Co., Ltd. | A device and method of implementing backup for e1/t1 interface |
| CN100479341C (en) * | 2006-07-21 | 2009-04-15 | 华为技术有限公司 | A device and method for the E1/T1 interface backup |
| CN101146144B (en) * | 2007-10-11 | 2010-06-23 | 中兴通讯股份有限公司 | E1/T1 interface circuit and E1/T1 interface circuit device with master/slave structure |
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| CN100372251C (en) | 2008-02-27 |
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Granted publication date: 20080227 |