Difference Between Simplex Duplex and Half Duplex

In the transmission of optical communication, we can often hear simplex, duplex and half-duplex, as well as single-core and dual-core; single-fiber and dual-fiber, so are the three related and what is the difference?

First of all, let’s talk about single-core and dual-core; single-fiber and dual-fiber, on the optical module, both are the same, but the name is different, single-core optical module and single-fiber optical module are single-fiber bidirectional both BIDI Optical modules, dual-core optical modules and dual-fiber optical modules are all dual-fiber bidirectional optical modules.

What is Simplex?

Simplex means that only one-way transmission is supported in data transmission. In practical applications, there are printers, radio stations, monitors, etc. Only accept signals or commands, do not send signals.

What is half duplex?

Half-duplex means that data transmission supports bidirectional transmission, but cannot perform bidirectional transmission at the same time. At the same time, one end can only send or receive.

What is duplex?

Duplex means that data is transmitted in two directions at the same time, which is the combination of two simplex communications, requiring the sending device and the receiving device to have independent receiving and sending capabilities at the same time.

In the optical module, half-duplex is the BIDI optical module, which can transmit and receive through one channel, but can only transmit data in one direction at a time, and can only receive data after sending data.

The duplex is an ordinary dual-fiber bidirectional optical module. There are two channels for transmission, and data can be sent and received in the same time period.

Post time: Mar-14-2022