8MAIN FUNCTIONS OF A PSMIn the Single Modules Office ,It Performs the PSTN,ISDN Subscriber Access and Call Handling,In a Multi-module Office ,It Is Connected Into the Central Module As One of the Module Offices .
9PSM cabinets Control cabinet #0 Subscriber cabinet #1
11THE STRUCTURE OF THE PSM DTI: Digital Trunk Interface (One DTI Module is handle 4 PCM)SLU: Subscriber Line Unit (13 SLU in One PSM)SLC: Subscriber Line Circuit (One SLU have 40 SLC and One SLC have Subscribers)40 X 24 = 960 Subscriber.960 X 13 = Subscribers in one PSM.Maximum Subscriber Capacity is 500,000Maximum Trunks Capacity is TrunksDSN: Digital Switching Unit (Simplified as T-Network)
12THE STRUCTURE OF THE PSM DSNI: Digital Switching Network InterfaceFBI: Fiber Bus InterfaceSYCK (Synchronization Oscillator)CKI Function is to provide generate system clock in case of reference failure for SYCK.MTT: Multi Task Test BoardSP: Subscriber ProcessorSPI: Subscriber Processor InterfacePEPD: Environment parameter detecting boardASIG: Analog Signaling UnitMP: Main ProcessorCOMM: Communication ModuleMONI Monitoring board
14THE STRUCTURE OF A PSM × Digital trunk unit Subscriber unit MFC DTMF TONE8Mb/sFBISNMCOMMV5.2No.716*8Mb/sMP0MP12Mb/sSignaling unit2Mb/sSwitching unit8K
15THE STRUCTURE OF THE PSM PSM Consists of the Following Basic Parts:Switching UnitSubscriber UnitDigital Trunk UnitAnalog Signaling UnitControl PartSynchronization Part
16THE STRUCTURE OF THE PSM Switching Network Layer123456789POWBCKISYDNTLFCKI: Function is to provide generate system clock in case of reference failure for SYCKSYCK: Synchronization Oscillator
17Working Mode: Active/Standby active standby MP/DSN /DSNI-SP
18THE STRUCTURE OF THE PSM Switching Network UnitDSN Unit Can Handle Time Slot Switching of the Voice Channel. And Control Message ChannelConstitution:2 DSN boardsDSNDSNWork mode:active /standby
19DIGITAL SWITCHING NETWORK 2 DSN Board in a PSMWorking Mode :Active/standbyEach DSN Board Is a Time Division Non-blocking Switching Network With Embedded T&S Structure
20DIGITAL SWITCHING NETWORK Main Function:Performing Voice Channel Connection Switching of Subscribers Inside the Module;Interconnected With Central Switching Network Module to Realize Inter-module Voice Channel Connection;For Mp to Set up Message Switching Connection and Communication Via Semi-permanent Connections With Function Units;
21Switching network unit THE STRUCTURE OF A PSMSwitching network unit63T networkunit1………...62261………...3132a 8K×8K T network.64 bi-directional HW at 8Mb/s(128TS)
22HWS DISTRIBUTION OF DSN IN PSM Each DSN board has 64 HWS.A HW bus rate is 8Mb/s(128ts)Each DSN board has a capacity of 8K*8K time slots
23HWS DISTRIBUTION IN PSM Message communication123DSN2021224561819Connected with various unitsInter-module connection6061Standby HW line6263Self-looping testing
24HWS DISTRIBUTION IN PSM Those Starting HW20 Upward Are Used for Connection With Subscriber Units. Each Subscriber Unit Seizes Two HW Lines;Those Starting Hw61 Downward Are Used for Connection With Digital Trunks and Analog Signaling Units. Each Unit Seizes One HW Line;FunctionSN.HW0~34HWUsed for Message CommunicationHW4-1916HWUsed For Inter-module ConnectionsHW20-6142HWUsed for Various Unit ConnectionUsually a Standby HW Line, Though It Can Also Be for Communication Between UnitsHW621HWHW631HWUsed for Self-looping Testing
25DSNI(DIGITAL SWITCHING NETWORK INTERFACE BOARD) Classification:An interface of MP level (MP-T network)An interface of SP level (SP –T network)
26DSNI-C (DIGITAL SWITCHING NETWORK INTERFACE BOARD) Function:An interface of MP level (MP- DSN)It Drives the Various Signals Transmitted Between MP and DSN.It Performs the Conversion of 8mb/s Data Stream and 2mb/s Data Stream.A Pair of DSNI Boards Handle 4 HWs.MP--COMM--DSNI-C--DSN
27DSNI-S (DIGITAL SWITCHING NETWORK INTERFACE BOARD) Function:An interface of SP level (SP – DSN)It Drives Transmission Between Function Unit and DSN.No Data Rate ConversionA Pair of DSNI Boards Can Handle 16 HWs.SP--DSNI-S--DSN
28FBI (Fiber Bus Interface) It Applies Synchronous Multiplexing Technique and Optical Fiber Technique to Implement the Interconnections of Modules .It Uses Two Optical Fiber Lines to Transmit up to 16 Lines of 8mb/s PCM SignalsIt Can Reduce Connection Wires and Increase Anti-interference Ability of the System, and to Reduce Mutual Cross Talks Among Wires.
29FBI(Fiber Bus Interface) Note :When HW Lines 4~19 Are Used for Intra-module Unit Connection,the FBI Board Must Be Replaced by the DSNI.
30THE STRUCTURE OF THE PSM Subscriber line unit123456789POWASLCIPOWASLC123456789MTA
31THE STRUCTURE OF THE PSM Subscriber line unit2 SP:Active/standby2 SPI(SP interface);active/standbyMTT(multi-task test board):used for subscriber line testMax.40 SLC(subscriber line circuit)Each SLC board can provides 24 subscriber linesA subscriber unit occupies 2 HWs and 2 Comm. ports
33THE STRUCTURE OF THE PSM Digital trunk unitThe Digital Trunk Unit Is the Interface Unit Between the Digital Switching System or Between Digital SPC Switches and Digital Transmission Devices.ABDTDTPCM 2Mb/s
34THE STRUCTURE OF THE PSM Digital trunk unitOne DT unit only has one DTI boardOne DTI board has 4 PCM (sub-unit)DTIPCM1Provide 120 digital trunk subscribers for every boardPCM2PCM3PCM4
35THE STRUCTURE OF THE PSM Classification:DTI can be configured asCASCCSModule Connect(Connection between modules)BRSU/ARSU (Connection with RLM/RSU)ISDN PRA (Primary Rate ISDN)One digital trunk unit occupies 1 HW,1 comm. port.
36THE STRUCTURE OF THE PSM Analog signaling unitOne Analog signaling unit only has one ASIG board.ASIG board can be configured as---DTMF function---MFC function---TONE function---CID function---Conf. function
37The structure of the PSM Analog signaling unitEach ASIG Provides 120 Channels.One ASIG Board Is Divided Into 2 Sub-units,to Be Separately Configured.DSP2#DSP1#
38DSP2# DSP1# ASIG-1: With all the chip Chip 1: TONE/DTMF/MFC/CID/CONF ASIG-2: W/O Conf. Chip for both DSPsChip 1: DTMF/MFC/CIDChip 2: DTMF/MFC/CIDASIG-3: With TONE only for DSP1Without Conf.Chip for both DSPsChip 1: TONE/DTMF/MFC/CIDChip 2: DTMF/MFC/CID交换机中的语音资源由音板提供，目前使用有两种：4M和64M音板。一块4M音板最多有2个音子单元，可录制16分钟左右，每个音子单元含有1片EPROM和2片FLASH MEMORY，程序固化在EPROM中，而语音通知音则加载到FLASH MEMORY里，可以平均分成256个音元。语音资源分两类，1类是交换机系统的呼叫业务所需的拨号音、忙音、证实音、空号音、特种拨号音、拥塞音等，他们的产生是根据国际通断比进行通断控制而生成的；另一类是语音通知音，它首先由录音设备录好相应语音，因为由录音设备所产生的语音文件有其特有的格式，所以需采用C语言程序(FLASH.CPP)将其转变为语音存储器中的数据格式并生成文件FLASH.DAT，然后由MP通过COMM经T网把录音数据发送到ASIG板上，最后由386EX通过双口RAM编程到FLASH MEMORY中。
39THE STRUCTURE OF THE PSM Control partPOWBSMEC12345678TVDN
40THE STRUCTURE OF THE PSM Control partA Pair of Active and Standby MPShared Memory Board(SMEM)Communication Board(COMM)Monitor Board(MON)Peripheral Environment (PEPD)
41SP---DSNI---DSN(T-network)---DSNI---SP THE VOICE CHANNELSuppose one subscriber in one SLU call another subscriber in another SLU,the voice channel will be as follows.SP---DSNI---DSN(T-network)---DSNI---SP
42The Message Channel SNM or other PSM DSNIC HW0至HW3 FBI MP C O M DSN DSNI-Sfunction unit
43THE STRUCTURE OF THE PSM Clock synchronous partRetrieving the reference clock from the superior exchange(DTI or FBI) ,it provides synchronization timing signalsSYCKSYCKCKIWorking mode:Active/standby
44Other country international office SYNCHRONIZATION MODEOther country international officePlesiochronousInternationalofficeInternationalofficeLSTSTSMaster/slave synchronizationPlesiochronousLSLSTMSMaster/slave synchronizationBITS(building integrated timing supply)RSMEnd office
45THE STRUCTURE OF THE PSM Clock synchronous unit2 SYCK boards1 CKI boardSYCK(synchronization oscillator)According to the reference clock generates the synchronous clock for the module or system(PSM).
46THE STRUCTURE OF THE PSM Clock synchronous unitCKIFunction is to provide generate system clock in case of reference failure for SYCK.
48Compact switching module Flexible configurationCOMM board9,10 slots: Inter-module communication11,12 slots: Intra-module communication13,14 slots: NO.7,V5 boardsASIG board:19-21 slots: Can share trunk slotsDT board:22-26 slots:25,26 slots can be shared by DTI and ODT.PCM1PCM2PCM3PCM4E1:
49HW 0-3 4 5 6 7 8 9 10-13 14-17 Hw 0,2 for communication Hw 1,3 idle Hw for SP..MP......ASIGASIGASIGDTDTDTODT/DTODT/DT..HW
50Compact switching module Flexible configuration:T Net & HW linesHW0--HW2: Used for communicationHW1--HW3: IdleHW4-HW6: Distributed to ASIGHW7-HW9: Distributed to DTHW10-HW17: Distributed to ODTHW18-HW29: Distributed to SPHW30-HW31: Used for self-looping
51RLM(RSU) RLM:Remote subscriber line module , RSU It is a subscriber unit used in a remote subscriber group .Each RLM is usually restricted to with in 960 subscriber lines.The way of connection between the PSM and RLM can be RDT board or RODT board.
53---used also as the DTMF number receiver and TONE voice resource. MTT (multi-task test)board:---used also as the DTMF number receiver and TONE voice resource.REPD board:----control the power board and ODT board----clock synchronization for RLM.
62The structure of background network The Network Contain 3 Types of Nodes:Foreground Active/standby MPBackground Servers(server)Background Maintenance Terminal(clients)
63The structure of background network MP (foreground ) connects with background by the Ethernet.It uses the HUB to connect each other.The communication protocol is TCP/IP.The operating system of Sever and Client is WINDOWS NT
64The structure of background network Each MP and the computer in background have a IP address respectively.The arrangement is as follows:1~128 identify the active/standby Mps of the 64 modules(MP nodes)129~133are background NT Server nodes134~187 are background Client nodes254 is for the specific alarm panel.
66Feature of ZXJ-10 Single Module 12480 Subscribers 2880 Digital Trunks Traffic capacity: More than 4200 Erl.BHCA: The tested result is more than 600K48 NO.7 links or 24 V5.2 interfaces.Active/ Standby non-blocking switching network of 8K×8K
67Multi-Module. (62 Modules) Subscribers64000 Digital TrunksTraffic Capacity: More than130000ErlBHCA: More than 7800KSwitching Network can be 32K, 64K, 128K, and 256K
68Operation and Maintenance According to the size of modules, SNM can be such types as of 32K, 64K, 128K, and 256K, of which 32k network can be employed to connect with 13 PSMs and 35 RSMs.The ZXJ10 SPC exchange employs the centralized maintenance & management mode. Its maintenance & management network has applied not only the client/server structure, which is based on the TCP/IP protocol, but also the WINDOWSNT4.0 operation system. Its contents contain such things as data, statistical traffic, billing, system measurement, system alarm, etc, which are substantial for the management and the maintenance of the exchange. The handling of the software and the data of the whole system is executed in OMM. Then SNM transmits the results to each peripheral module, and can be under remote operation as well as maintenance management.The main processor of MSM (or other PSM modules) can be connected into Ethernet via the standard TCP/IP protocol. Thus, the message inter working between OMM and the foreground processor is available.
70Rich Services Abbreviated dialing Hot-line service with time-out Call restrictionDon’t disturb serviceAbsent-subscriber serviceMalicious call tracingInterception of callsWake-up servicesCall forwarding no replyCall forwarding unconditionalCall forwarding on busyCall back on busy
71Rich Services Register on busy Call waiting Three party service Conference callingCaller identification (CID-I, CID-II)Restriction to the caller identificationCustomer own number reported serviceMultiple subscriber number (MSN)Office code restriction function: To any subscriber of ZXJ10, the coded office numbers can be restricted at the maximum of 96
72ZXJ-10 provides standard ISDN interfaces 2B+D interface30B+D interface
73The Standardized Supplementary Services Direct dial in (DDI)Multiple subscriber number (MSN)Calling line identification presentation (CLIP)Calling line identification restriction (CLIR)Connected line identification presentation (COLP)Connected line identification restriction (COLR)Sub-addressing (SUB)Call forwarding on busy (CFB)Call forwarding no reply (CFNR)
74The Standardized Supplementary Services Call Forwarding Unconditionally (CFU)Call Waiting (CW)Call Holding (CH)Terminal Portability (TP)Conference Calling (CONF)Three-Party Service (3PTY)Closed User Group (CUG)User-User Signaling Service
75Extra New ISDN Services Besides the Supplementary Ones Don’t Disturb ServiceHot Line Without Time-OutCall Out RestrictionWake-Up Service
76NO.7 Signaling SystemThe link number is more than 512, which can be up to 1280 when serving as the independent STP.The number of the signaling link groups is more than 256, which can be up to 640 when serving as the independent STP.The routing area number is over 2000.The simultaneously supported signaling networks can be up to 8.The load of each signaling link exceeds 0.8Erl.The systematic GTT capability exceeds 4,000GTT/s.The number of GT stored by GT translation table exceeds 200,000.Serving as the independent STP, the system signaling processing capability exceeds 40,000MSU/s.Serving as the independent STP, the STP transit delay is below the national standard.
77User Type Telephone Set, PABX Public phone (RASL( reverse polarity subscriber), PASL 16KC charging phone)DDN private line subscriberCentrex subscriber2B+D and 30B+D subscribersIP Access subscriber
78Numbering PlanThe numbering plan can adapt such conditions as the local connection in the networks with both equal number length and unequal number length, the automatic, semi-automatic, manual connection of domestic and international long distance call, special call services, test call and also the numbering requirement when utilizing new services.The numbering plan is flexible. Number modification can be achieved by man-machine commands. It adapts the future change, increase and decrease in specific numbering mode.
79Capability of Number Storage and Analysis Receiving and storing of 16-digit valid calling number, expandable to 20 digits.Analyzing 1 to 8 digits numbers by demand, to meet the requirement for determining the call type, route selection plan, called number length and charging rate. There are different number translation tables for different user groups.Number digits increasing, decreasing or translating according to the received number, income trunk or circuit services type. It meets the requirement of route selection or special connection establishment.The received number is delivered to the destination wholly or partly, and the transmission mode of end-to-end or link-by-link as well as the transmission mode in group or receiving-while sending mode is adopted.The capability of number processing and analyzing is adaptable to the requirement of future network change.
80RoutingIn the range of nominal trunk amount, the number of trunk routes and circuits per route can be assigned according to requirement.To one target office, the number of direction for routing is not less than 5.Routing principle: choosing direct route at first, then choosing the first bypass route, then the second, choosing the final route at last.Complete utilization for the selection of each route circuit group. The traffic load of each circuit will be averaged.The office-to-office trunk of local offices group is utilized.
81Time Monitor Not dialing after hook-off: 10 seconds Not dialing between digits: 20 secondsNo answer of local call: 60 secondsNo answer of long distance call: 90 secondsNo answer of international call: 120 secondsHowler tone: 60 secondsBusy tone: 40 seconds (adjustable)
82Capability of Traffic Load The traffic load of trunk and subscriber line is shown as the following table:Reference loadSubscriber lineTrunkLoad0.25Erl/line0.8Erl/trunk
83Design of Reliability and Availability Hardware:1. The key parts adopt active /standby structure2. Hardware design3. SMT technology, ASIC, EPLD, FPGA and DSP technology is utilized.4. Optical fiber connection between modules5. High reliable components are adopted6. Meeting the electromagnetism compatible test7. Adopting the forced cooling mechanism8. Adopting three-level over-voltage, over-current protection mode, it will recover automatically when over-voltage and over-current.
84Software1. Adopting object-orient technology, software engineering and modular design2. Fully adopting HDLC protocol for communication in modules and between modules3. Adopting advanced network OS and large scale relevant database4. Adopting multiple level inspection, diagnosis and restart mechanism5. Adopting multiple level protection mechanism in charging6. Software trash processing program7. Adopting four-level load control
85Subscriber Line and Signaling Receiver Index Subscriber line indexSubscriber loop resistance: <2000 Ohm (3000 Ohm max)Feed current: >18mAIsolation resistance between lines and between line to ground: >20000 OhmCapacitance between lines: 0.7 μFSubscriber signal indexPulse receiver:Pulse speed is 8~14 pulses/sec
86Subscriber Line and Signaling Receiver Index Make-break ratio 1:1.6±0.3Interval between pulse strings: 350msSubscriber signal index relative with MFPB telephone:Reliable receiving within 2.0% frequency offset; No receiving over 3.0% frequency offset; Receiving not for sure within 2.0%~3.0% frequency offset.While working in dual frequency, single frequency receiving level range is -4~-23dBm, single frequency no response level is -31dBmLevel difference between two frequencies: <=-6dB
87Over-Voltage Protection Exposed (no first level protection), the over-voltage protection ability is more thanThunder wave: 10μS/700μs, voltage peak value is 1000VPower line induction: voltage is 650 V r.m.s, duration time is 500msPower line touch: voltage is 220V r.m.s, duration time is 15min.Unexposed (with first level protection), the over-voltage protection ability is more thanThunder wave: 10μS/700μs, voltage peak value is 4000VPower line induction: voltage is 650V r.m.s, duration time is 1s.
88Network Synchronization The clock and synchronization of the ZXJ10 switch accords with the Recommendation of G.811, G.812 and G.813, providing the grade 2 and grade 3 clock.1. Synchronization mode: master/slave.2. Clock working mode: both grade 2 and grade 3 clocks have rapid capture, tracing, holding and free running mode.3. Redundancy: both grade 2 and grade 3 clocks have two independent clocks with same function, while one clock is fault, another clock can work proper immediately. There are 2~4 selections for reference clock, and with failure auto-switchover function. The BITS interface function is included in the ZXJ10 switch.4. Clock reliability: MTTR of ZXJ10 clock is more than 10 years.5. Accuracy: second level clock: ±4*10-7, third level clock: ±4.6*10-6
89Network Synchronization 6. Initial max frequency offset: second level clock: <5*10-10, third level clock: <1*10-87. Max frequency offset: second level clock: <1*10-9/day, third level clock: <2*10-8/day8. Draught range: second level clock: synchronized with the clock of ±4*10-7 accuracy. third level clock: synchronized with the clock of ±4.6*10-6accuracy.9. Phase stability: change is less than 1/8 UI during the any time of 211UIWhile more or equal with 211UI, the phase change of every 211UI interval is less than 1/8 UI, and total wander is less than 1μs.Long period phase change: in any term of S>=100s, the max time interval error of output clock is less than 1μs.10. Synchronization link interface: meeting the ITU -T G