Some of those conversations with politicians, industrialists and others have been leaked to the media and have been reported on widely.
Rata Tata, who is one of Radia's biggest clients and was on the leaked tapes, had last month filed a case against the government in the Supreme Court on the grounds that the leaked tapes encroached upon his right to privacy.
Tata said that while he had no objection to any investigation by the government, his conversations with Radia that were made available to the public were of a personal nature and are irrelevant to charges like tax evasion and foreign exchange violations, which are among the reasons why Radia's phone was allegedly tapped from 2008-2009.
The tapes are also being used by the CBI to investigate the details of the 2G scam.
BJP to intensify protests
Refusing to get bogged down by the government's one-member probe panel that will investigate the telecom policy from 2001, BJP along with its NDA allies like the JD(U) announced on Friday that it would now take the corruption issue to the streets. Rajya Sabha Leader of the Opposition Arun Jaitley said, "Once the session is over, we will take the issue to the people and carry out agitations in coordiantion with our NDA allies."
Jaitley said his party is seriously examining the possibility of bringing a privilege motion against Sibal for announcing the probe at a press conference and not in parliament, when it is in session. "Our Lok Sabha colleagues are seriously examining the possibility (to move a privilege motion against Sibal)...the motion can be brought in the House of which the minister is a member."
Rejecting Sibal�s move to order probe into telecom auction during NDA regime, BJP sources said, "As far as we are concerned, the probe by a retired SC judge is a non-issue. It does not bother us. They will not hit much dirt.