ct1, ct2 & dect

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CT1, CT2 & DECT

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CT1, CT2 & DECT

Nor Kumalasari Caecar Pratiwi23212301SISTEM KOMUNIKASI NIRKAWATCORDLESS TELEPHONE TECHNOLOGY

CT1, CT2 & DECTCORDLESS TELEPHONECordless telephonesystem are full duplex communication systems that use radio to connect a portable handset to a dedicated base station, which is then connected to a dedicated telephone line with a specific telephone number on the public switched telephone network (PSTN).

CORDLESS TELEPHONE

Classify Of Various Cordless SystemsCT1 First Generation of analog cordless telephones that was standardized by theEuropean Conference of Postal and Telecommunications Administrations(CEPT) in 1984 and deployed in eleven European countries. CT1 Standard SystemCT1CT1+Frequency Band914 - 915 MHz / 959 - 960 MHz885 887 MHz / 930 932 MHzAccess MethodFDMAFDMADuplex MethodFDDFDDNumber Of Carriers4080Channel Per Carriers11Channel Spacing25 KHz25 KHzModulationFMFMCT2 Second Generation of cordless telephones introduced in Great Britain in 1989.CT2 offers good speech quality, is more resistance to interference, noise and fading, and uses a compact handset with built-in antenna.Digital transmission provides better security. CT2 Standard

CT2 Standard Structures Frame CT2Digital Enhanced Cordless Telephone (DECT) Universal cordless telephone standard developed by the European Telecommunication Standards Institute (ETSI). It is first European standard for cordless telephone and was finalized in July 1992.DECT provides a cordless communication framework for high traffic density, short range telecommunications and covers a broad range of application. Offers excellent quality and services for voice and data applications. DECT Architecture

DECT Functional Concept Block DiagramDECT Standard

DECT Standard

DECT TDMA Frame Structure

DECT StandardTERIMAKASIH1

Cordless Telephone Standart

Analog

Digital

CT0

CT1

ISM

CT1+

CT2

DECT

PHS

PCN

PCS

ISM

CVSD

ADPCM

SS

CT2+

To Mobile

From Mobile

2 millisecond

G

D

64 bits of end-user information

D

G

G ~ Guard Time = 8-bitsD ~ Data Channel (Control Information) = 4-bits