It has also secured €50 million via a parallel loan from the Black Sea Trade and Development Bank (BSTDB) to use for strategic investments in Greece and develop new generation networks.
OTE plans to invest up to €1.3 billion over the next four years.
Separately, Ekathimerini reports that the Greek-Russian businessman Ivan Savvidis has offered to buy Alpha TV, which faces the prospect of closure.
Savvidis, who owns the Salonika football club PAOK, made the proposal to both Dimitris Kontominas, the owner of Alpha TV, as well as to other channel owners who lost out in a recent licence competition, in comments he made in a sports programme shown by the public broadcaster on September 11.
Savvidis himself failed in his efforts to secure a TV licence, bidding €61.7 million in the process.
Significantly, he said he would also like to cooperate with the four licence winners.