CN105302792A - Adjusting method of voice platform architecture - Google Patents
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Abstract
The invention discloses an adjusting method of a voice platform architecture. The adjusting method comprises following steps: adding a trunk gateway: processing all incoming calls for 95588 via the new trunk gateway after all services are gathered and directly transferring incoming calls to seats of a south branch center via an SIP relay connected with an SBC; utilizing conventional AVAYA first group of gateways and second group of gateways as new service platforms and applying for a new trunk line in charge of incoming new services; utilizing a conventional third group of gateways as a backup for the new trunk gateway in charge of incoming 95598 services, connecting a spare line of a carrier, keeping 8 E1 board cards by a PN3 gateway and keeping IP trunk connection with conventional ASM; and utilizing a conventional fourth group of gateways as a backup for gathering of all services, backing up the fourth group of gateways for transferring all incoming services of 95588 to a call platform of a company in Shangdong for processing.
Description
Technical field
The present invention relates to a kind of voice platform framework method of adjustment.
Background technology
According to the requirement of State Grid Corporation of China 95598 service set work arrangements, Shandong company completes in October, 2014 intensive work that 95598 all traffics answer business.Complete smoothly for ensureing that Shandong company 95598 full-service is concentrated, guarantee that full-service is concentrated the call of rear Shandong company 95598 and errorless is forwarded to southern branch center call platform with circuit-switched data is complete, need the original call platform of Shandong company and relaying access device to adjust and transformation.For above requirement, Shandong company replaces existing AVAYA audio call platform by using new Tandem Gateway according to Guo Wang company uniform requirement, realizes Tandem Gateway and directly nets docking of southern branch center with state.
The outfit of equipment of replacing is comparatively advanced, Years Of Service is shorter, software hard state is very good, Shandong company is through careful thinking, the maximum use value of abundant excavating equipment, formulate voice platform framework Adjusted Option, an AVAYA audio call platform part of replacing will be used as new business traffic platform, and it is a part of using the back-up system as newly-increased Tandem Gateway in addition, once Tandem Gateway goes wrong, or there is extreme case, cannot to transfer southern branch center, AVAYA audio call platform is as emergency system, process caller client, transfer to state and net southern branch center by calling through the relaying be connected with SBC or process in Shandong company this locality.
Summary of the invention
The present invention is in order to solve the problem, propose a kind of voice platform framework method of adjustment, this method utilizes original equipment as the redundancy of new system, ensure that speech channel also normally can be transferred to state's net south/northern center when new gateway goes wrong, and when ensureing that state's net south/northern centring system goes wrong, 95598 caller clients in Shandong can be answered in time, can not cause traffic accident, have also stopped the situation of idle waste simultaneously.
To achieve these goals, the present invention adopts following technical scheme:
A kind of voice platform framework method of adjustment, comprises the following steps:
(1) newly-increased Tandem Gateway, after full-service is concentrated, the incoming call of all 95598 processes by newly-increased Tandem Gateway, directly forwards incoming call to southern branch center attend a banquet process by the SIP trunk be connected with SBC;
(2) original AVAYA first networking pass and the second networking are closed and as new business platform, will be applied for new trunk, the incoming call of carrying new business;
(3) backup as newly-increased Tandem Gateway is closed in original 3rd networking, be responsible for the incoming call of 95598 business, connect the extension wire of operator, PN3 gateway retains 8 E1 boards, also retains the IP relay connection with original ASM simultaneously;
(4) backup after concentrating as full-service is closed in original 4th networking, back up the 4th networking pass to be processed by the call platform being responsible for the business of all incoming calls 95598 to forward to Shandong company, original 4th networking is closed the backup after concentrating as full-service and is retained 8 E1 boards;
(5) backup link of the SIP link that the SIP trunk retaining setting quantity in the connection of ASM and SBC is connected with SBC as newly-increased Tandem Gateway;
(6) back up in AVAYA audio call platform and retain the configuration of original CTI/IVR related service, resetting and attend a banquet as init state, retaining and configure with the connection of voice system.
In described step (3), to operator's application extension wire, for switching during primary line fault, need to increase E1 circuit automatic switchover device.
In described step (3), operator comprises UNICOM, telecommunications and commmunication company.
In described step (4), there is extreme case, the core network being communicated with southern branch center breaks, or when southern branch center operation system is unavailable, backup the 4th networking is closed and is processed by the call platform being responsible for the business of all incoming calls 95598 to forward to Shandong company.
In described step (5), the SIP trunk quantity that the connection of ASM and SBC will retain is at least 120 tunnels.
In described step (5), E1 line switcher need be increased, increase gateway fails newly and can automatically switch to the 3rd networking once detect Huawei and close on rack circuit.
In described step (5), when there is operator's main line fault, fault occurs in carrier side, and situation comprises operator's local side fault, operator's main line equipment failure, and operator's main line interrupts; During operator's local side fault, show as a certain operator and all circuits cannot be provided, comprise main line and extension wire, now from Huawei's voice gateways automatic decision faulty line and this operator's route of bypass, can all transfer other operator's routes to; When operator's main line equipment failure or main line physical discontinuity, E1 switch 1 is by automatic decision main line fault, by circuit switching to extension wire, switch 1 will send fault warning automatically to network management system simultaneously, webmaster personnel confirm extension wire upstate, and carry out call testing immediately, and notify that operator checks main line problem.
In described step (5), during voice gateways fault, by E1 switch 2, when finding voice gateways fault, E1 circuit switching is shut to AVAYAG650 the 3rd networking by automatic or manual, realize continuing of business, at utmost reduce the service outage duration that equipment failure brings.
In described step (6), meanwhile, need to back up in AVAYA audio call platform and delete the configuration of original CMS/Recorder related service, recovering init state, only retaining and configure with the connection of voice system.
Beneficial effect of the present invention is:
(1) by the double copies of client service center, both solved the waste of throwing aside of the equipment such as original recording server, IVR voice answer-back server, AIC server and switch, stopped again answering equipment that state nets southern client service center damage and cause telephone traffic system paralysis, traffic blocks up;
(2) by the equipment double copies of media gateway, ensure that speech channel also normally can be transferred to state and net southern center when new gateway goes wrong, thus guarantee reliability and the redundancy of system;
(3) on the basis of existing device, multiple traffic hidden danger is solved, cost-saving, raise the efficiency.
Accompanying drawing explanation
Fig. 1 is original system structural representation;
Fig. 2 is the system architecture schematic diagram after service set;
Fig. 3 is enforcement Organization Chart of the present invention;
System cloud gray model figure when Fig. 4 is newly-increased gateway fails;
Fig. 5 is the system cloud gray model figure of state when netting southern client service center's fault.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, the system architecture before service set, comprises AVAYA audio call platform, and AVAYA audio call platform comprises recording server, IVR voice answer-back server, AIC server, ASM manager and switch, and four groups of media gateway.
As shown in Figure 2, after service set, need newly-increased gateway, original AVAYA audio call platform and four groups of media gateway are all in discarded state, cause the waste of equipment and leave unused, once the device fails of southern client service center is netted by newly-increased gateway or state, the caller client in all Shandong will all cannot be answered, and is absorbed in traffic accident.
As shown in Figure 3, a kind of two business voice service systems based on equipment redundancy, comprise newly-increased gateway, first networking is closed, second networking is closed, 3rd networking is closed and the 4th networking is closed, southern client service center is netted by Shandong client service center and state, wherein Liang Ge client service center comprises recording server, IVR voice answer-back server, AIC server and switch, wherein, IVR voice answer-back server connects respective recording server, recording server, IVR voice answer-back server, AIC server connects switch, AIC server is connected with AES server, and the switch of Liang Ge client service center realizes mutually hot standby, newly-increased gateway connects by network the IVR voice answer-back server that southern client service center is netted by state, 3rd networking pass is closed by switch control rule with the 4th networking, is connected by network the IVR voice answer-back server that southern client service center is netted by state, first networking is closed, the IVR voice answer-back server being connected Shandong client service center by network is closed in the second networking, and the switch of Liang Ge client service center realizes mutually hot standby.
Described Shandong client service center is equipped with artificial customer service to attend a banquet.
Described IVR voice answer-back server is integrated with TTS text-to-speech system.
The AVAYA call platform system mainly G650 gateway related to, 4 groups of AVAYAPN (gateway group) are had in current system, 1, (PN) is closed in 2,3,4 networkings all 2 G650 gateways, and each G650 gateway has the IPSI control card be connected with master server.G650 powers employing dual power supply.Ip voice compressing card (TN2602) across communication between PN (gateway group) in G650 gateway is double card.
(PN1) is closed in original AVAYA first networking and the second networking pass (PN2) will as new business platform, apply for new trunk, the incoming call of carrying new business, simultaneously, also the customer service function of 95598 is retained, net the hot standby of voice platform center, southern branch center as state, when the generation equipment failure of southern branch center, voice disaster tolerance are netted by state, answer the caller client in Shandong in time.
(PN3) backup as newly-increased Tandem Gateway is closed in original 3rd networking, is responsible for the incoming call of 95598 business, application UNICOM, telecommunications, the extension wire of mobile three operators.
Original 4th networking close (PN4) concentrate as full-service after backup, once there is extreme case, the such as SBC equipment at connection center, north and south goes wrong or core network breaks, or north and south center service system is unavailable, the call center being responsible for the business of all incoming calls 95598 to forward to Shandong company processes by alternative scheme.
The SIP trunk that ASM (AvayaSessionManager) will retain some with the connection of SBC (SessionBorderController) connects, suggestion at least retains 120 tunnels, the backup link of SIP link that this SIP trunk link will be connected as newly-increased Tandem Gateway with SBC.
Consider economy, the 3rd networking closes (PN3) by reservation 8 E1 boards, to carry out but not open-minded, when only having newly-increased Tandem Gateway to go wrong, then undertaken open-minded by operator with the connection line of three operators; But this kind of solution can cause the interruption of business, the response speed depending on operator break period and the time of again opening.
Meanwhile, (PN3) is closed in the 3rd networking will retain the IP relay connection with original ASM (AvayaSessionManager), this circuit that can detour once newly-increased Tandem Gateway goes wrong.
Original 4th networking close (PN4) concentrate as full-service after backup by reservation 8 E1 boards, to carry out with the connection line of three operators but not open-minded, and carry out the IP relay connection with original ASM (AvayaSessionManager).
As shown in Figure 4, after full-service is concentrated, when newly-increased Tandem Gateway goes wrong, 95598 incoming call business are by under the intervention of operator, by all open-minded for the trunk that (PN3) is closed in connection the 3rd networking, three operators can connect 8 E1 circuits altogether.
All dial 95598 calling will by the 3rd networking close (PN3) gateway access, IP relaying again by being connected with ASM (AvayaSessionManager), and the SIP trunk that ASM (AvayaSessionManager) is connected with SBC, call diversion is netted branch center, north and south to state.
As shown in Figure 5, when SBC or branch center, north and south go wrong:
There is extreme case after concentrating in full-service, goes wrong towards the go wrong traffic platform of even branch center, north and south of the SBC equipment of branch center, north and south or core network, and the incoming call of 95598 all cannot normal process, needs to adopt emergency mechanism
95598 incoming call business are by under the intervention of operator, and by all open-minded for the trunk that (PN3) and the 4th networking pass (PN4) are closed in connection the 3rd networking, three operators can connect 16 E1 circuits altogether.
All dial 95598 calling will by the 3rd networking close (PN3) and the 4th networking pass (PN4) access, and by the intrasystem relevant setting of AVAYA, calling is transferred to Shandong company this locality to process, connect local IVR, then be transferred to this locality by IVR and attend a banquet process.
As seen from the above, the system after improvement can reach following re-set target:
A part for former voice platform, using the back-up system as newly-increased voice gateways, guarantees that when 2 newly-increased voice gateways all go wrong speech channel can normally be transferred to Guo Wangnan center; Guarantee reliability and the redundancy of system.
A part for former voice platform, using the back-up system as state's net north and south centring system, go wrong, or when the data network connecting state's net center, north and south goes wrong, caller client can be carried out artificial treatment in this locality once state's net north and south centring system.Guarantee the normal operation of Customer Service Center.
The idle part of former voice platform carries out Added Business on current platform basis, improves the utilization rate of original platform.
Embodiment 1:
Guo Wang Shandong Electric Power Group Customer Service Center voice system uses AVAYA voice platform and NICE recording system, and third-party SBC server composition, after full-service is concentrated, state's net Shandong Electric Power Group 95598 voice platform mainly comprises call control server (CMServer), media gateway (G650MediaGateway), CTI interface server (AESServer), cti server (AICServer), ivr server (VPMS/MPPServer), recording server (RecorderServer), report server, TTS server, Web server, database server and phone agent's terminal etc.Call control server is the core of audio call platform, forms two-node cluster hot backup framework by two customized version private servers of HPDL360G7, is responsible for the relaying of all voice calls, extension set and all incoming calls exhalation and controls and control of authority.The access of media gateway primary responsibility voice class media and conversion process, be responsible for continuing voice local side digital repeatered line and being converted to VOIP voice packet.Cti server primary responsibility is by telephone exchange and computer association, on the one hand by the data message of telephone exchange as trunk port, caller IDs etc. are sent to computer terminal and present to and attend a banquet, attend a banquet on the other hand and can be dialled by dialogue machine by CTI interface, answer, transfer, the sequence of operations such as meeting.Ivr server primary responsibility provides the voice answer-back function of robotization to come partly to replace operator attendance.
2.1Avaya audio call platform architecture is transformed:
1), after full-service is concentrated, the incoming call of all 95598 processes by newly-increased Tandem Gateway, directly forwards incoming call to southern branch center attend a banquet process by the SIP trunk be connected with SBC.
2) original AVAYA first networking pass and PN2 as new business platform, will apply for new trunk, the incoming call of carrying new business.
3) backup as newly-increased Tandem Gateway is closed in original 3rd networking, is responsible for the incoming call of 95598 business, application UNICOM, telecommunications, the extension wire of mobile three operators.
4) backup after concentrating as full-service is closed in original 4th networking, once there is extreme case, the core network being such as communicated with southern branch center breaks, or southern branch center operation system is unavailable, the call platform being responsible for the business of all incoming calls 95598 to forward to Shandong company processes by alternative scheme.
5) SIP trunk that the connection of ASM (AvayaSessionManager) and SBC will retain some connects, advises at least retaining 120 tunnels, the backup link of SIP link that this SIP trunk link will be connected as newly-increased Tandem Gateway with SBC.
6) consider economy, PN3 gateway, by reservation 8 E1 boards, to be carried out with the connection line of three operators but not open-minded, only has when the gateway of Huawei goes wrong, then is undertaken open-minded by operator; But this kind of solution can cause the interruption of business, the response speed depending on operator break period and the time of again opening.
7) simultaneously, PN3 gateway will retain the IP relay connection with original ASM (AvayaSessionManager), this circuit that can detour once newly-increased Tandem Gateway goes wrong.
8) original 4th networking closes the backup after concentrating as full-service by reservation 8 E1 boards, to carry out but not open-minded, and carry out the IP relay connection with original ASM (AvayaSessionManager) with the connection line of three operators.
2.2 implementation step
1), after full-service is concentrated, Guo Wang Shandong Province net 95598 system does not need the movement carrying out physically to equipment, only needs adjustment trunk and system configuration.
2) in AVAYA audio call platform, retain the configuration of original voice system, upgrade system software patch state.
3) back up in AVAYA audio call platform and retain the configuration of original CTI/IVR related service, resetting and attend a banquet as init state, retaining and configure with the connection of voice system.
4) back up in AVAYA audio call platform and delete the configuration of original CMS/Recorder related service, recovering init state, only retaining and configure with the connection of voice system.
5) reconfigure ASM (AvayaSessionManager) server, configure 120 SIPTRUNK to SBC servers, configuration PN3 gateway provides 8 E1 relayings, connects the circuit of three operator's circuits that newly-increased Huawei gateway connects respectively.For realizing this function, E1 line switcher need be increased, increasing gateway fails newly can automatically switch on AvayaG650PN3 rack circuit once detect Huawei.
6) to three operator's application extension wires, for switching during primary line fault, need equally here to increase E1 circuit automatic switchover device.
7) retain the repeated link of Huawei's voice gateways and AVAYAASM in the AcmeSBC equipment landed at state's net simultaneously, can realize when Huawei's gateway fails switching fast.
2.3E1 circuit and equipment switching flow
2.3.1 operator's main line fault
1) this situation usually occurs in carrier side, and main conditions have: operator's local side fault, operator's main line equipment failure, and operator's main line interrupts;
2) during operator's local side fault, a certain operator can be shown as all circuits cannot be provided, comprise main line and extension wire, now from Huawei's voice gateways automatic decision faulty line and this operator's route of bypass, can all transfer other operator's routes to;
3) (as optical cable is dug disconnected) when the equipment failure of operator's main line or main line physical discontinuity, E1 switch 1 by automatic decision main line fault, by circuit switching to extension wire.Switch 1 will send fault warning automatically to network management system simultaneously, and webmaster personnel confirm extension wire upstate, and carry out call testing immediately, and notify that operator checks main line problem.
2.3.2 Huawei's voice gateways fault
1) state's net Shandong Electric Power Group side uses Huawei's voice gateways at present, and single device exists Single Point of Faliure, cannot realize 95598 phones landing in Shandong Province as this equipment goes wrong.Therefore we can pass through E1 switch 2, when finding Huawei's voice gateways fault, E1 circuit switching is shut to AVAYAG650 the 3rd networking by automatic or manual, continuing of business can be realized fast like this, at utmost reduce the service outage duration that equipment failure brings.
2) E1 switch 2 and E1 switch 1 can be two kinds of use-patterns of same equipment, this switch is mainly through automatically monitoring ISDN-PRI line signal state to judge whether circuit normally works, when detecting that line signal reports an error or signaling is lost, then automatic switching line, also supports the Long-distance Control manual switching of webmaster side simultaneously.
2.4 southern branch center failover flow processs
2.4.1 non-conformance description
After full-service is concentrated, occur extreme case, the core network towards southern branch center goes wrong or the traffic platform of southern branch center goes wrong, and the incoming call of 95598 all cannot normal process, needs to adopt emergency mechanism.
2.4.2 case study
When there is extreme case, interrupting appears in the SIP trunk circuit network of such as southern branch center, or when southern branch center occurs that special status causes providing business service, now needs 95598 business to be transferred to again Shandong company this locality and process.
2.4.3 Resolving probiems
When after the above-mentioned situation of appearance, net southern branch center immediately with state and ask approval for instructions, as fault cannot be recovered at short notice, adopt this switching flow.
1) all or part of for the new business in transformed new business platform business stopped, vacant resource is supplied to 95598 business and uses.
2) the IVR flow process backed up before is reactivated, will back up CTI data of attending a banquet reactivate before.
3) as above-mentioned data are not conflicted with new business platform, then can directly call, without the need to again importing.
4) manually control mode, switches to rapidly the trunk connecting PN3 and PN4 by the trunk originally connecting Huawei SIP gateway.
5) call out local 95598 hot lines and carry out operation flow test, monitor whether operation flow is normal.
6) after state's net centring system is recovered, carry out business in morning and switch recovery, and test.
7) the business work order that temporary takeover state accepts is submitted to state's net process.
3 voice platform new business are optimized
The 3.1 new business scope of applications
As previously described, after state's network service is concentrated, existing system vacant go out a large amount of available resources, these resources can re-use by we, carry out new business.
3.1.1 incoming call business
Incoming call business mainly can provide business consultation, and outlet is inquired about, and the functions such as bill inquiry, can utilize the automatic report function of IVR directly to provide the functions such as subscriber payment status inquiry in conjunction with charge system.
3.1.2 call business
Call business mainly can provide initiatively carries out call to user, is specially adapted to premium notice, and temporary interruption is rationed the power supply the proactive dissemination of the important informations such as notice.
3.1.3 encased column base
Encased column base refers to and can make full use of vacant resource, and system being supplied to other needs the business unit carrying out call center's business to rent.The mode that both can be to provide system platform carries out outsourcing, also can be to carry out outsourcing to business.
3.2 conclusion
State Grid Shandong Electric Power Company AVAYA voice platform structure is adjusted and optimized, effectively can provide powerful and stable emergent support to state's net voice platform on the one hand, the new business platform of complete set also can be provided on the other hand.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (9)
1. a voice platform framework method of adjustment, is characterized in that: comprise the following steps:
(1) newly-increased Tandem Gateway, after full-service is concentrated, the incoming call of all 95598 processes by newly-increased Tandem Gateway, directly forwards incoming call to southern branch center attend a banquet process by the SIP trunk be connected with SBC;
(2) original AVAYA first networking pass and the second networking are closed and as new business platform, will be applied for new trunk, the incoming call of carrying new business;
(3) backup as newly-increased Tandem Gateway is closed in original 3rd networking, be responsible for the incoming call of 95598 business, connect the extension wire of operator, PN3 gateway retains 8 E1 boards, also retains the IP relay connection with original ASM simultaneously;
(4) backup after concentrating as full-service is closed in original 4th networking, back up the 4th networking pass to be processed by the call platform being responsible for the business of all incoming calls 95598 to forward to Shandong company, original 4th networking is closed the backup after concentrating as full-service and is retained 8 E1 boards;
(5) backup link of the SIP link that the SIP trunk retaining setting quantity in the connection of ASM and SBC is connected with SBC as newly-increased Tandem Gateway;
(6) back up in AVAYA audio call platform and retain the configuration of original CTI/IVR related service, resetting and attend a banquet as init state, retaining and configure with the connection of voice system.
2. a kind of voice platform framework method of adjustment as claimed in claim 1, is characterized in that: in described step (3), to operator's application extension wire, for switching during primary line fault, needs to increase E1 circuit automatic switchover device.
3. a kind of voice platform framework method of adjustment as claimed in claim 1, is characterized in that: in described step (3), operator comprises UNICOM, telecommunications and commmunication company.
4. a kind of voice platform framework method of adjustment as claimed in claim 1, it is characterized in that: in described step (4), there is extreme case, the core network being communicated with southern branch center breaks, or when southern branch center operation system is unavailable, backup the 4th networking is closed and is processed by the call platform being responsible for the business of all incoming calls 95598 to forward to Shandong company.
5. a kind of voice platform framework method of adjustment as claimed in claim 1, is characterized in that: in described step (5), and the SIP trunk quantity that the connection of ASM and SBC will retain is at least 120 tunnels.
6. a kind of voice platform framework method of adjustment as claimed in claim 1, it is characterized in that: in described step (5), E1 line switcher need be increased, increase gateway fails newly and can automatically switch to the 3rd networking once detect Huawei and close on rack circuit.
7. a kind of voice platform framework method of adjustment as claimed in claim 1, it is characterized in that: in described step (5), when there is operator's main line fault, fault occurs in carrier side, situation comprises operator's local side fault, operator's main line equipment failure, operator's main line interrupts; During operator's local side fault, show as a certain operator and all circuits cannot be provided, comprise main line and extension wire, now from Huawei's voice gateways automatic decision faulty line and this operator's route of bypass, can all transfer other operator's routes to; When operator's main line equipment failure or main line physical discontinuity, E1 switch 1 is by automatic decision main line fault, by circuit switching to extension wire, switch 1 will send fault warning automatically to network management system simultaneously, webmaster personnel confirm extension wire upstate, and carry out call testing immediately, and notify that operator checks main line problem.
8. a kind of voice platform framework method of adjustment as claimed in claim 1, it is characterized in that: in described step (5), during voice gateways fault, by E1 switch 2, when finding voice gateways fault, E1 circuit switching is shut to AVAYAG650 the 3rd networking by automatic or manual, realize continuing of business, at utmost reduce the service outage duration that equipment failure brings.
9. a kind of voice platform framework method of adjustment as claimed in claim 1, it is characterized in that: in described step (6), simultaneously, need to back up in AVAYA audio call platform and delete the configuration of original CMS/Recorder related service, recover init state, only retain and configure with the connection of voice system.
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| CN109561227A (en) * | 2018-11-13 | 2019-04-02 | 平安科技（深圳）有限公司 | The method and device of junction line switching, electronic equipment, storage medium |
| CN109561227B (en) * | 2018-11-13 | 2021-09-10 | 平安科技（深圳）有限公司 | Trunk line switching method and device, electronic equipment and storage medium |
| CN110233761A (en) * | 2019-06-12 | 2019-09-13 | 广东佳米科技有限公司 | A kind of redundancy switching method and system based on Relay Server |
| CN110233761B (en) * | 2019-06-12 | 2022-04-22 | 广东佳米科技有限公司 | Redundancy switching method and system based on relay server |
| CN111355988A (en) * | 2020-03-31 | 2020-06-30 | 苏州科达科技股份有限公司 | Business disaster recovery method, equipment and readable storage medium |
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