Simplex Communication

Simplex communication refers to communication that occurs in one direction only. Two definitions have arisen over time: a common definition, which is used in ANSI standard and elsewhere, and an ITU-T definition. The ITU definition of simplex is termed "half duplex" in other contexts.

Read more about Simplex Communication:  ANSI Definition: One Way Signaling, ITU-T Definition: One Way Signaling at A Time