New Delhi: A plea by former Telecom Minister A Raja that he would not cross-examine prosecution witnesses unless the CBI probe is over in 2G spectrum case, was dismissed on Friday by a Delhi court which began formal trial in the matter.

Raja made the plea minutes before Special Judge O P Saini commenced formal trial, beginning it with the recording of first prosecution witness, Reliance Capital Ltd Vice President Anand Subramaniam's statement.

"As soon as the investigation in this case, which started on October 21, 2009, is complete and all the statements as mandated in section 244 of the CrPC as supplied to the applicant, the right to recall the witnesses for cross examination will be exercised," Raja said in an application to the court.

Appearing for Raja, senior advocate Sushil Kumar told the court that the CBI has apprised the Supreme Court that their investigation in connection with Loop Telecom is going on.

Raja's counsel said the court should ask the agency if the investigation as far as all the 17 accused is complete.

He said the investigation in the case is going on as only one FIR has been registered by the CBI.

The court, however, dismissed Raja's plea and began recording the statement of the first prosecution witness.

Trial commenced in a Delhi court in the 2G spectrum allocation case on Friday in which former Telecom Minister A Raja, DMK MP Kanimozhi, corporate honchos and telecom firms are among the high-profile accused.

Special CBI Judge O P Saini started recording statement of Anand Subramaniam, Assistant Vice President of Reliance Capital Ltd, as a prosecution witness.

The court had also summoned for two other prosecution witnesses -- Group President of Reliance A N Sethuraman and Chief Regulatory Officer of Etisalat DB Telecom Pvt Ltd Vinod Kumar Budhiraja -- for their examination.

The CBI, in its first list, had submitted names of 28 persons to be examined as prosecution witnesses before the court in the month of November.

The court after framing charges against 17 accused, including three telecom firms, had slated the trial to begin from Friday.

In the first list, out of 28, 11 witnesses are from Reliance Anil Dhirubhai Ambani Group (ADAG) which suggest that the agency wants to deal first with the charges against accused firms Reliance Telecom Ltd (RTL) and Shahid Usman Balwa promoted Swan Telecom.

Besides Raja and Kanimozhi, the court had framed charges against Reliance ADAG Managing Director Gautam Doshi, its Group President Surendra Pipara, its senior Vice President Hari Nair, Shahid Usman Balwa, Unitech Ltd's MD Sanjay Chandra, DB Realty MD Vinod Goenka, Kalaignar TV MD Sharad Kumar and Bollywood filmmaker Karim Morani.

Former Telecom Secretary Siddharth Behura, Raja's former Private Secretary R K Chandolia, directors of Kusegaon Fruits and Vegetables Pvt Ltd Asif Balwa and Rajeev Agarwal, and three telecom firms -- RTL, Swan Telecom and Unitech Wireless (Tamil Nadu) Pvt Ltd have also been put on trial in the case.

The charges framed against all the accused under various provisions of the IPC and the Prevention of Corruption Act deal with offences of criminal conspiracy, cheating, forgery, faking documents, abusing official position, getting bribe and criminal misconduct by public servant.

The offences entail punishment ranging from six months in jail to life imprisonment.