POTSDAM, Germany, June 7 (Xinhua) -- EU chief diplomat Javier Solana said Wednesday that he is ready for more talks with Iran on the six-nation proposals presented to Iran a day earlier aimed at diffusing the months-long standoff over the country's nuclear crisis.

    "I am ready to visit Teheran again," said Solana in eastern city of Potsdam after meeting German Chancellor Angela Merkel.

    Solana said he is waiting for a swift signal from Iran, noting that talks with Iranian leaders on Tuesday were "good" and "very constructive."

    "I am now much more optimistic than a month ago," said the diplomat after visiting the Potsdam-based operation headquarters of the EU's mission to the Democratic Republic of the Congo.

    Merkel said this is a "really important chance" to solve the conflict through diplomatic solutions and urged Iran to respond positively. Solana, who arrived in Tehran on Monday, has presented a package of incentives, agreed last week between five UN Security Council permanent members, Britain, China, France, Russia and the United States, plus Germany, in exchange for Iran's suspension of uranium enrichment.

    Details of the proposals are unknown, but diplomats said they included a light-water nuclear reactor and a foreign supply of atomic fuel for Iran, as well as an offer to suspend sanctions against Iran in the UN Security Council.

    The proposal also carries penalties that can be applied by the United Nations Security Council if Tehran does not cooperate, said diplomats.

    Iran's top national security official Ali Larijani has said it contained "positive steps" but some "ambiguities" have to be removed.

    The official IRNA news agency quoted Foreign Minister Manouchehr Mottaki as saying "On the nuclear question, we prefer cooperation to confrontation." Enditem