Subspace transmission
A subspace transmission was a type of subspace communication that was unidirectional.

During a conversation with the Bajoran Sirco Ch'Ano in 2369, Nog scrambled the subspace transmission by using an engineering tool so visual communication was impossible. Sirco believed that a subspace interference affected the signal. ()

After Odo established a subspace link to Kora II for medical records, Jadzia Dax informed him that Gul Dukat had responded to Odo's earlier subspace transmission requesting his attention. ()

In 2370, after Gul Dukat had been kidnapped, Kira Nerys received a signal on Deep Space 9 from somewhere in the Demilitarized Zone from a group taking credit for the kidnapping, and calling themselves the Maquis. ()

Subspace
Communications technology