The Central Bureau of Investigation (CBI) has taken several steps to deal with corruption in Bharat Sanchar Nigam Limited (BSNL). Here are some of the measures taken by the CBI:

• The CBI initiated an investigation into alleged irregularities in awarding contracts to private firms for installing telecom equipment in different parts of the country.
• The CBI conducted searches at several locations, including the offices of BSNL officials and private companies, to collect evidence of corruption and illegal activities.
• Various individuals, including BSNL officials and private company officials, have been arrested and charged under various sections of the Prevention of Corruption Act and Indian Penal Code.
• The CBI has also requested the Department of Telecommunications to take action against BSNL officials found guilty of corruption.

Since the investigation is ongoing, it is difficult to provide an exact number of locations searched by the CBI.