Ireland secured promotion to Davis Cup Group II thanks to an impressive 2-1 victory over Georgia in Saturday's play-off.
The Irish side did it the hard way, coming back from an opening defeat, as Osgar O'hOisin was beaten 6-4 6-3 by Aleksandre Bakshi.
However, the in-form Simon Carr restored parity with a straight sets, 6-2 6-2 victory over Aleksandre Metreveli, which forced a doubles decider.
Carr teamed up with David O'Hare and the duo made light work of Aleksandre Bakshi and Zura Tkemaladze to secure a 6-3 6-1 win.
"We're over the moon," said stand-in captain, Cian Blake. "The last time we went to World Group II was by default, so getting promoted by right, on court, is fantastic.
"I'm really proud of the team. They are warriors."
Meanwhile, in the Billie Jean King Cup, Ireland finished fifth out of 21 teams in Group IV after defeating South Africa 2-1 in the second play-off on Saturday.