Telephone links between Tonga and the wider world began to be reconnected on Wednesday, though restoring full internet connectivity is likely to take a month or more according to the owner of the archipelago’s sole undersea communications cable.

The explosion of the Hunga Tonga-Hunga Ha’apai volcano, which has killed at least three people and sent tsunami waves across the Pacific, knocked out communications around the nation of about 105,000 people on Saturday.

Telecom operator Digicel said late Wednesday local time that it had managed to restore international calling capability, though Reuters was not immediately able to reach numbers in Tonga.

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