South and North Korea held daily phone calls via their liaison and military hotlines Tuesday, officials said, a day after Pyongyang restored the inter-Korean communication channels.

On Monday, the two Koreas reopened the cross-border communication lines following a near two-month suspension. The move came hours after the North's state media announced that the lines would be back in normal operation as of 9 a.m. on the day.

"South and North Korea's daily call at 9 a.m. took place normally via the inter-Korean liaison office," a unification ministry official said.

The defense ministry also said both of their direct military communication lines -- the eastern and western hotlines -- as well as their call via ship-to-ship radio links that use the global merchant marine communication network operated normally.

The resumption of daily calls came 55 days after the North began refusing to answer South Korea's calls in protest of an annual combined military exercise between the South and the United States.

The North has long denounced the allies' annual military exercise as a rehearsal for invasion. (Yonhap)