The Bush administration offered major concessions to its allies yesterday, agreeing during a high-level meeting in Paris to allow the sale of advanced telecommunications equipment to newly democratic nations of Eastern Europe, administration and industry sources reported.

The new U.S. position is far more liberal than one President Bush announced a month ago. It would allow the sale of "very sophisticated telecommunications equipment" to countries that have agreed to set up controls that would keep the equipment away from the Soviet military, an industry official said. These countries are Czechoslovakia, Hungary and Poland.

The plan would permit American Telephone & Telegraph Co., for instance, to sell Poland additional equipment to help it make better use of the new digital switches that Warsaw has bought to modernize its creaky telecommunications system.

Just hours after the administration had unveiled its position in a meeting of the Paris-based Coordinating Committee for Multilateral Export Controls (Cocom), the U.S. House of Representatives approved by a 312 to 86 vote a new export-control law that would open the door wider for East European purchases of advanced technology. The legislation, opposed by the administration, included an amendment that would ban the sale of advanced technology to the Soviet Union until it ends its economic boycott of the breakaway republic of Lithuania.

The House also overwhelmingly approved another amendment that would ban exports of commercial satellites to China, which is developing its own launch capability. House members said they were protesting the Chinese government's crackdown on student dissidents a year ago.

The new concessions on telecommunications in Paris follow administration decisions to allow the sale of more advanced machine tools and computers to Eastern Europe and the Soviet Union. These rollbacks from positions announced as recently as a month ago were designed to prevent a serious rupture between the United States and the other members of the 17-nation group that controls high-technology sales to Eastern Europe and the Soviet Union.

Industry sources said the new U.S. stance easing restrictions on sales of machine tools, computers and telecommunications equipment goes beyond what U.S. allies sought last October, when the United States found itself with an unshared position in Cocom. A West German industrialist said he now realizes that "our {West German} proposals {in Cocom} were pretty modest" and should have gone further.

The administration position to liberalize restrictions in some areas of telecommunications appeared to be part of a broader arrangement with Britain that included action by the two governments Tuesday to block competing proposals by U.S. and British telephone companies to build a fiber-optics communications system across the Soviet Union.

The United States also is believed to be working to find a way around British objections to placing more restrictions on sales to Moscow than to its former satellites. This would involve "cleverly crafting" requirements to protect the technology in a way that would exclude the Soviet Union, sources said.

Industry representatives said the Bush administration asked them to withdraw their support for the House legislation in return for the concessions in Cocom, but they said the deal was rejected.

The key new telecommunication technology that would be available to Eastern Europe is known as common channel signal systems. The technology allows more efficient use of long-distance communications circuits by using one channel to place the call and another to carry the voice or data transmissions once the call is completed.

The National Security Agency is believed to have opposed allowing the sale of this technology because it would make it harder for the agency to eavesdrop on telephone conversations.