Diplomatic foes North and South Korea installed a direct phone line between their leaders on Friday as they prepare for the first summit since 2007 — and the connection was great, the South's presidential office said.

South Korea's presidential Blue House and North Korea's State Affairs Commission tested the hotline for four minutes before South Korea's Moon Jae-in and North Korea's Kim Jong Un talk ahead of next week's summit, the office said.

"The call quality was very good and we felt like we got a call from our next-door neighbor," South Korea's director for the Government Situation Room, Youn Kun-young, told reporters.