The Joint Parliamentary Committee (JPC) examining telecom policies in the wake of the 2G scam today decided to call all former Telecom Ministers since 1998, including A Raja to depose before it.

CBI Director A P Singh and two senior CBI officials briefed the JPC on the probe agency''s inputs related to its investigation into the scam, Committee Chairman P C Chacko told reporters here.

Singh briefed the JPC on the investigation into the 2G scam and said a third charge sheet into the matter would be filed during the current month.

Fourteen licences were issued to Aircel Maxis in 2004 but the licences were given in 2006. "The CBI is probing why there was a delay," Chacko said.

Singh and his team briefed the JPC about the "progress and findings" into the alleged irregularities into the 2G spectrum allocation in January 2008.

Chacko said the JPC has also finalised a list of 85 witnesses who would be asked to be present for recording of evidence in connection with the telecom policies.

Secretaries of the Departments of Telecom, Law, Finance, Revenue Corporate Affairs will be asked to appear before the JPC, he said.

"All former Telecom Ministers since 1998 will also be called for recording of evidence," Chacko said.