Iran would welcome a broad dialogue with US President-elect Barack Obama's administration, Iranian Ambassador to International Atomic Energy Agency said on Monday.

Ali Ashgar Soltanieh, said that if Obama makes good on his campaign pledge to drop preconditions on talks with Tehran, it could pave the way for a significant cooling of tensions between the US and Iran.

"If these changes are really genuine, and not cosmetic, then there would be optimism that there would be a change" in US foreign policy, Soltanieh told reporters at IAEA headquarters.

"We are fully prepared to sit at the negotiating table with all countries provided that there are no conditions and all are on equal footing."