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  Telecom U. B. Desai SPANN LabDepartment of Electrical Engineering IIT-Bombay ubdesai@ee.iitb.ac.in   Aug 4, 2005Telecom2 Data Communication Pyramid in India Land Line Phones(56.6 Kbps)(PCOs, Cyber Cafes) Cell Phones(115 to 384 kbps shared data connect) Highspeedconnect .   ã GSM + 3G1x: 55 mil GPRS  – 172 kbps (shared)EDGE  – 384 kpbs (shared)3G-1x --115 kbps (shared) ã 50 mil phones ã ~ 1 mil PCOs) ã Fiber to the curb ã Wireless access   Aug 4, 2005Telecom3 Back Bone: Fiber ã Back bone will be fiber  ã Very cost effective (except for the last mile) ã Various industries are laying fiber across India (BSNL, MTNL, Reliance, Bharati, Tata-Tele, Shyam Telecom, etc.):  – In cities there will be fiber drop every 500 mts. ã in cities we expect fiber to the curb technology, already there in parts of several metros ã thus last mile access will be from curb to building ã There is talk of fiber to home, but at present this is not cost effective  – In rural areas there will be fiber drop every 25 kms. ã BSNL fiber is available at every taluk in the country   Aug 4, 2005Telecom4 500 mtsFiber dropRoad Housing Complex A  Serves Bldg 1,2,3 Fiber drop Serves Bldg 4,5,6 135642Housing Complex B Urban Scenario for Fiber in the Loop Technology
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