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香港—資訊社會 - 「數碼21」資訊科技策略

香港—資訊社會 - 「數碼21」資訊科技策略

香港—資訊社會 - 「數碼21」資訊科技策略

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5. 5. Telecommunications Services5.1 — 2.2 5.1 Business receipts - please refer to paragraph2.2 of this Appendix.5.2 CDMA 5.2 Code Division Multiple Access (CDMA) is adigital mobile telecommunications system whichuses a technique of multiplexing called spread spectrum for coding of signals into digital form fortransmission in a communication channel.5.3 — 2.8 5.3 Establishment - please refer to paragraph 2.8of this Appendix.5.4 5.4 External telecommunications services, whichmay include voice, facsimile or data, are services 綫 operated over external leased circuits supplied byFixed Telecommunication Network Services/FixedCarrier/Unified Carrier licensee for communicationswith places outside Hong Kong.5.5 PCS 1.7/1.8 5.5 Personal Communications Services (PCS) is akind of digital mobile telecommunications servicewhich operates in the 1.7/1.8 GHz band.5.6 PMRS 5.6 Public Mobile Radio-telephone Services 800/900(PMRS) is a kind of digital mobiletelecommunications service which operates in the800/900 MHz band.5.7 2G 5.7 Second Generation (2G) wireless services isCDMA the digital mobile telecommunications service TDMAGSM operating on Code Division Multiple AccessPCS(CDMA), Time Division Multiple Access (TDMA),Global System for Mobile Communication (GSM)and Personal Communications Services (PCS)systems.131Hong Kong as an Information Society 2009

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