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AXE10 - Overview

Salient features- Design. SPC stored programme controlPCM principlesTST time space time principle.Duplicated CP central processorRPs ? regional processorsFunctional modularity ? smoother, quicker hardware extension, system upgradation is easier, new functions easily incorporatedHighest degree

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AXE10 - Overview

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    1. AXE10 - Overview M/s Ericsson Telecom , Sweden BHCA – busy hour call attempts capacity 8,00,000 CCS-7 & ISDN support 26,000 Erlang Blocking factor 10 power -6 ie one call in 10,00,000 may fail due to blocking in group switch. Hardware redundancy – duplicated hardware – built in check functions – automatic block and switch over

    2. Salient features- Design SPC stored programme control PCM principles TST time space time principle. Duplicated CP central processor RPs – regional processors Functional modularity – smoother, quicker hardware extension, system upgradation is easier, new functions easily incorporated Highest degree of backward compatibility One system for all applications – local, transit, Mobile switching centre, hybrid

    3. Functional hierarchy

    4. AXE – Subsystems in APT Both software and hardware SSS – subscriber switching subsystem GSS – group switching subsystem TSS – trunk and signalling subsystem CCS- common channelling subsystem OMS – operation and maintenance subsystem Only software SUS – subscriber services subsystem CHS – charging subsystem TCS – traffic control subsystem

    5. AXE – Subsystems in APZ CPS – central processor subsystem RPS – Regional processor subsystem IOG – input output group - FMS File management subsystem - MCS Man machine communication - SPS Support processor subsystem - DCS Data communication subsystem

    6. Functional blocks Each subsystem will have functional blocks. Eg BT both way trunk is a functional block in TSS . Software in RP is BTR, Software in CP is BTU. Interworking between function blocks is only through CP Data of a function block is accessed by its own program only.

    7. SSS – subscriber switching subsystem Functions BORSHCT function Battery feed- (-48V DC) Overvoltage protection Ringing current Subscriber line signalling Hybrid – 2 wire to 4 wire conversion Concentration/expansion Testing of subscriber lines

    8. SSS functions Analogue to digital / D to A conversion Switching Scanning for off/on hook Digit / tones receiving Control tones CJ - combines junctor– a coordinating function block – coordinated all functions in the SSS subsystem – only software

    9. SSS functions Switching within SSS Switching ( time slot change) Calls within same EMG switched without using GSS

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