"Reliance Communications has already complied with a DoT order in this regard and informed the same to the DoT," an RCom official told PTI.
Telecom major Airtel has started circulating SMS to its subscribers for listing their name in directory giving them a choice to opt out. A subscriber opting to be left out of the directory has to send an SMS to Airtel at a cost of Rs 3.
According to industry sources, the DoT order to publish online directory was issued in March 2013 but it is being complied now as there were privacy issues that needed to be addressed.
"We are taking permission of customers if they want to be in. There are apprehensions that telemarketers may start pestering them or even lot of nuisance can be created by mischievous elements. We don't want customers face such issues. We expect to complete process by September 15," a Connect Broadband Official said.
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Progress by state-run telecom firm and market leader in landline segment BSNL could not be ascertained. An MTNL official said that the company is working on the process.
Vodafone, Videocon and MTS jointly account for around 1 per cent market share.
Tata Teleservices, Vodafone and MTS did not reply to queries in this regard.