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Sample Data Format
 Number of Telephones in Tamil Nadu
(1997-98) 
 Items  Number 
 Numbver of Exchages   
 Number of Equipped capacity   
 Number of Working lines   
 Number of Junction lines   
 Number of Telephones in use   
 Number PBX and PABX   
 Number of Extensions from Direct Exchage lines   
 Number of extension from PBX &  PABX   
 Number of Public Call Offices   
 Local   
 Long Distance   
 Total   
 
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