NEW DELHI  (Reuters) - The speaker of India's parliament will meet all political  parties on Thursday to try resolve an impasse that threatens to deadlock  the February budget session of parliament,  a senior opposition leader  said.
    But no breakthrough was expected as the Congress-led  government  continues to reject demands by the opposition for a  joint parliamentary  committee investigation into the sale of  telecoms licences that could  have lost the state $39 billion  in revenues.
    "There is a lunch meeting called by the speaker. It is  related  to how to overcome the current problem," said S.S.  Ahluwalia of the  main opposition Bharatiya Janata Party (BJP).
    The government says parliament's Public Accounts Committee  is  already looking into the matter. It will examine government  accounts  and reports of the state auditor to see if  expenditure has conformed to  what has been approved by  parliament, but has narrower powers than a  joint parliamentary  committee and cannot question ministers on its own.
      But Prime Minister Manmohan Singh has  offered to appear before  and answer questions from the  PAC, which is headed by the  independent-minded BJP leader  Murli Manohar Joshi.
    BJP protests shut down the December session of parliament  and  the government could not pass key reform bills, including  those to ease  land acquisition for industries and mines.
    A repeat of the deadlock would make it difficult for the   Congress party to get approval for the federal budget for  2011/12 and  further delay reforms. But there is no threat to  the government as it  has a narrow majority in parliament.
