TEGUCIGALPA (Reuters) – Honduras is on the verge of ending a four-month political crisis after rival camps cut a deal that could return ousted President Manuel Zelaya to power and earn international support for a Nov. 29 election.

Buckling under pressure from US diplomats, negotiators for Zelaya, toppled in a June 28 coup, and the de facto leader Roberto Micheletti who replaced him, agreed to put an end to Central America's worst political turmoil in two decades.

The deal, a diplomatic victory for US President Barack Obama, leaves it up to the Honduran Congress to decide whether Zelaya can be restored to serve the last few months of his term -- the question that caused earlier talks to stumble.

"We've taken a first step,'' Zelaya said on Friday as negotiators put final signatures to the agreement that could end months of isolation for the poor coffee-producing nation.

Zelaya supporters celebrated and even some opponents said they preferred to see him restored than carry on with a crisis that disrupted everyday life. ''I hope Mel comes back because everything was peaceful and better before,'' said ice cream vendor Ramon Sanchez, 41, using the leftist's nickname.

A vote by Congress is expected after the Supreme Court gives a non-binding opinion on the matter, but no date has been set. The breakthrough late on Thursday came after a high-level US delegation flew to Tegucigalpa for a last-ditch effort to end a crisis that created a foreign policy headache for Obama as he seeks better relations with the region.

"Both sides in regard to the issue of restitution, have committed this decision to Congress,'' US Assistant Secretary of State for Western Hemisphere Affairs Tom Shannon said. "Both have indicated that they will abide by it, and I believe them,'' he told reporters. ''This is a political issue that's going to be resolved politically.''

Lawmakers from the ruling and opposition parties said they would not take a stance on returning Zelaya until the Supreme Court had given its opinion on the legality of such a move.