诺基亚MSC简单介绍

诺基亚MSC简单介绍一、诺基亚设备的基本构架及功能模块简介交换平台：DX200结构：分布式模块化1、DX 200 MSC 结构2、MSC各功能单元ET - Exchange TerminalRedundancy: nonePurpose: The ET performs the electrical synchronization andadaption of external PCM lines. It is able to do the HDB3 codingand decoding, inserts the alarm bits in the outgoing direction andproduces the PCM frame structure.The Number of the ET is the same as the number of the PCMline. Numbers 0-63 are reserved for internal PCM's in the MSC.Type: Functional UnitSubunits: No subunitsInterfaces: - PCM- SynchronizationGSW - Group SwitchRedundancy: 2nPurpose: The GSW is the switching network of the MSC. It iscontrolled by the Marker(M).The minimum size for the MSC is 32x32 PCM's, the maximumsize is 1024x1024.Type: Functional Unit, subunit of the MSubunits: No subunitsInterfaces: - Control-bus to SWCOP in MarkerMB - Message BusRedundancy: 2nPurpose: The MB is the physical connection between the computerunits. It is controlled by the message bus interfaces located inevery computer unit.Type: Functional UnitSubunits: No subunitsInterfaces: - DMC-BusM - MarkerRedundancy: 2nPurpose: The marker controls and supervises the GSW, hunts freecircuits and is responsible for connecting and releasing of allconnections. M, GSW, TG and DTMFG make up a switch-overentity which is duplicated.Type Computer UnitSubunits: GSW Group SwitchOptional: - V ANG Verbal Announcement GeneratorInterfaces: - Message Bus interface- DMC-bus- Control bus to GSWOMU - Operation and Maintenance UnitRedundancy: 2nPurpose: The OMU contains all centralized supervision, alarm andrecovery functions. There is also the user terface(MMI-System).On the OMU hard disks there is the whole system software andthe event buffer for intermediate storing of alarms.Type: Computer UnitSubunits: No subunitsInterfaces: - Message Bus Interface- Small Computer Systems Interface (SCSI)- Wired Alarms- Clock Control Channel (ASS-Channel)- Serial Interface (SERO)CM - Central MemoryRedundancy: 2nPurpose: The central memory takes care of the routing functions(e.g. digit analysis). Further it contains all system configurationdata and master copies of distributed files.It is also responsible for the central functions of the signallingsystem CCS #7 in smaller exchanges.Type Computer UnitSubunits: noneOptional: -V ANG Verbal Announcement GeneratorInterfaces: - Message Bus InterfaceCCMU - Common Channel Signalling Management UnitRedundancy: 2nPurpose: The common channel signalling management unit isresponsible for the network management functions of thesignalling system CCS #7 in bigger exchanges.Type Computer UnitSubunits: noneInterfaces: - Message Bus InterfaceCMU - Cellular Management UnitRedundancy: 2nPurpose: The cellular management part is responsible for thecontrol of the cellular radio network. It is also involved byhandover.Type Computer UnitSubunits: noneInterfaces: - Message Bus InterfaceSTU - Statistical UnitRedundancy: 2nPurpose: The statistical unit collects the performance andmeasurement data from the network. in smaller exchanges it isalso responsible for the collection and storage of charging data Type Computer UnitSubunits: noneInterfaces: - Message Bus Interface- Small Computer Systems Interface (SCSI)CHU - Charging UnitRedundancy: 2nPurpose: The charging unit collects and stores charging datain bigger exchanges (takes over from STU)Type Computer UnitSubunits: noneInterfaces: - Message Bus Interface- Small Computer Systems Interface (SCSI)VLRU - Visitor Location Register UnitRedundancy: 2nPurpose: The VLRU contains information about each subscriberwhich is currently being served by the MSC. The VLRU isavailable in pairs, with a maximum of 5 pairs per MSC. One paircan contain up to 30.000 subscribers.Type Computer UnitSubunits: noneInterfaces: - Message Bus InterfaceBDCU - Basic Data Communication UnitRedundancy: N+1/CPurpose: The BDCU contains all communication links to the O&Mnetwork (analog and/or digital) and to the Billing Center. OneBDCU can handle a maximum of 8 connections.Type: Computer UnitSubunits: No subunitsOptional: - COCEN L AN terminalInterfaces: - Message Bus Interface- X.25- physical interface: V.24/V.28, V.35, X.21 and G.703CLSU - Clock and Synchronization UnitRedundancy: 2nPurpose: The CLSU generates the necessary clock signals for theMSC. When using hierachical mode the oscillator issynchronized to up to four inputs (ET's) usually coming fromPSTN.Type: Functional UnitSubunits: No subunitsInterfaces: - ASS-channel to OMUCCSU - Common Channel Signalling UnitRedundancy: n+1Purpose: The CCSU handles CCS7 signalling between MSC andPSTN and towards other NSS-network elements Type: Computer UnitSubunits: No subunitsInterfaces: - Message Bus Interface- CCS7BSU - Base Station Signalling UnitRedundancy: n+1Purpose: The BSU handles CCS7 signalling between MSC andBSC.Type: Computer UnitSubunits: No subunitsInterfaces: - Message Bus Interface- CCS7IWCU - Interworking Control UnitRedundancy: 2nPurpose: The IWCU controls the different modem-pools(interworking equipment) and the echo-cancellers.Type: Computer UnitSubunits: No subunitsInterfaces: - Message Bus Interface- LAPDECU - Echo Canceller UnitRedundancy: nonePurpose: The ECU cancels the echo generated in the 2 wiresubscriber cable in the PSTN and is controlled by the IWCU.Used only for speech calls!Type: Functional UnitSubunits: No subunitsInterfaces: - PCM- LAPDDASU - Data Service Unit(modem pool)Redundancy: nonePurpose: The modem pool is used for data communication servicestrough the PSTN and is controlled by the IWCU.The DASU is the most general part of the totalinterworking equipment.Type: Functional UnitSubunits: No subunitsInterfaces: - PCM- LAPDLSU - Line Signalling UnitRedundancy: n+1Purpose: The LSU controls the announcement machine (ANM)using Channel Associated Signalling (CAS).Type: Computer UnitSubunits: No subunitsInterfaces: - CAS- Message Bus InterfaceANM - Announcement MachineRedundancy: nonePurpose: The ANM plays back recorded announcements and iscontrolled by the LSU.Type: Functional UnitSubunits: No subunitsInterfaces: - PCM/CASCASU - Channel Associated Signalling UnitRedundancy: n+1Purpose: The CASU is necessary when Channel AssociatedSignalling (CAS) is used in the PSTN. It can handle upto 16signalling links. Furtermore it deals with signallinf test-features,like continuity checking.Type: Computer UnitSubunits: No subunitsInterfaces: - Message Bus Interface- CASPAU - Primary Rate Access unitRedundancy: n+1Purpose: The PAU performs the call control and signalling for thetraffic of a Private Branch Exchange (PBX), usually ISDN,connected to DX 200 system. It can handle upto 16 signallinglinks for DPNSS1 or PRA.Type: Computer UnitSubunits: No subunitsInterfaces: - Message Bus Interface-LAPDCNFC - Conference CircuitRedundancy: nonePurpose: The CNFC enables the multiparty-service and operatorinterception. One CNFC can control 4 conferences, with amaximum of 6 participants per conference.Maximum 18 CNFC per MSC.Type: Functional UnitSubunits: No subunitsInterfaces: - PCMVANG - Verbal Announcement GeneratorRedundancy: 2nPurpose: The V ANG can be used to handle announcements as well.Compared to the ANM, it acts like an internal device. Upto 126channels are available, allowing 2000 announcements. TheV ANG can store about 32 minutes of speech elements.Announcements are recorded by the VARS (VoiceAnnouncement Recording System), which consists of an PCincluding sound card and software. The announcements must becopied to the OMU-disks to make them avalaible for the V ANG.Type: Functional UnitSubunits: No subunitsInterfaces: - PCM二、常用指令ZAHO; 输出当前告警ZWVI; msc/VRL numberZUSI; 查看各功能模块工作状态ZNRI; 查看信令点数据ZNSI; 查看link set数据ZNLI; 查看所有LINK工作状态ZCEL:NCGR=HBA1; 查看电路状态（zrri：gsw;）ZRRI:GSW; 查看电路组参数ZDOI; 查看所有单元CPU负荷值ZDRI；查看同步时钟ZOLT; 查看信令负荷ZYEF:,680; 查看传输状态二、告警监控部分1、告警报告：告警发生的位置、告警的等级一般情况●扰动*●告警*●告警**●严重告警***2、告警打印输出结构举例说明：QQM3/CN57R CCM-0 SWITCH 2005-08-29 09:52:26.36** ALARM BSU-4 1C004-00 CCNETM(4745) 2072 FAILURE IN SIGNALLING LINK ACTIVATION OR RESTORATION 00CC 03 01 012072 FAILURE IN SIGNALLING LINK ACTIVATION OR RESTORATIONMeaningThe activation or restoration of a signalling link fails.If there are other available signalling links in the signalling link set, signalling traffic is transmitted through them.Signalling transmission capacity is, however, decreased.The alarm 1072 SIGNALLING LINK OUT OF SERVICE has also been issued about this signalling link.Supplementary information fields1 number of signalling link2 error code01 initialization of control record of signalling link fails02 semipermanent connection of signalling link terminal inswitching network fails03 initial alignment of signalling link fails04 ET is not in state WO-EX05 signalling link has no signalling link terminal function3 number of signalling link terminal4 number of logical signalling link terminalInstructions1. If the 2nd supplementary information is 03, act accordingto the instructions of alarm 1072.2. If the 2nd supplementary information is 04, check the stateof the ET with the MML command USI and change it into state WOwith the MML command USC.3. If the 2nd supplementary information is 05, not enoughsignallinglink terminal have been equipped or a signalling link terminal isfaulty. Add a new signalling link terminal or replace the faulty signalling link terminal with a new one.You can also move the signalling link to another unit with the MML command NCM.4. If the 2nd supplementary information is 02, check that the INTERN PCM-TSL shown in the printout of the MML command NEL belongs to the route AS7 (246H) (RCI:GSW:NCGR=AS7:;)and that the EXTERN PCM/TSL timeslot belongs to the route CS7 (247H).If not, add them with the MML command RCA.If they do, check the alarms issued by the marker and act according to their instructions.5. If the 2nd supplementary information is 01, the information of the signalling link was not found in the signalling link set file. Store the files SILSET (139H), SLINKF (13AH) from the active CM and SLCONT (13DH) from the active CCM (or CM, if there are no CCMs in the equipping) and contact the local Nokia Customer Service Center.CancellingDo not cancel the alarm. The system cancels the alarm automaticallywhen the fault has been corrected.。