Telecom Indonesia has blocked international calls to and from a human rights group in Papua province.
Telecom Indonesia has declined to say why it has imposed restrictions on the phones at the Els-ham office in Jayapura.
The block applies only to international calls and not to local calls.
Elsham has alleged increased harrassment by pro-Jakarta militia towards human rights activists and volunteers of non-government organisations.
Elsham says the military harrassment is part of a government crackdown on pro-independence supporters.