--- title: Which duplex option should I be using for comms? description: "In Reach Control there are two options when you set up a port: full-duplex or half-duplex. "Duplex" is used to refer to the direction of communication, and whether communications are going in both dir" --- [Skip to content](https://reach-robotics.com/knowledge-base/which-duplex-option-should-i-be-using-for-comms#main-content) English Show submenu for translations [SUBMIT A SUPPORT TICKET](https://reach-robotics.com/knowledge-base/kb-tickets/new?hsLang=en) ![Reach.Robotics-Logo.White.png\]](https://reach-robotics.com/hs-fs/hubfs/Reach.Robotics-Logo.White.png?height=40&name=Reach.Robotics-Logo.White.png) Open main navigation Close main navigation - English Show submenu for translations - [SUBMIT A SUPPORT TICKET](https://reach-robotics.com/knowledge-base/kb-tickets/new) - RETURN TO MAIN SITE RETURN TO MAIN SITE KNOWLEDGE & SUPPORT HUB - There are no suggestions because the search field is empty. 1. [KNOWLEDGE & SUPPORT](https://reach-robotics.com/knowledge-base?hsLang=en) 2. [Integration](https://reach-robotics.com/knowledge-base/integration?hsLang=en) # Which duplex option should I be using for comms? In Reach Control there are two options when you set up a port: full-duplex or half-duplex. "Duplex" is used to refer to the direction of communication, and whether communications are going in both directions at the same time, or just one. **Full Duplex** means that data is being both transmitted and received at the same time, while **Half Duplex** means that data can only be transmitted OR received at the same time. When configuring your port, use the following options for each type of communication: - **RS232**: Full Duplex - **RS485**: Half Duplex - **UDP**: Full Duplex - **TCP**: Full Duplex - [Operation](https://reach-robotics.com/knowledge-base/operation?hsLang=en) - [Integration](https://reach-robotics.com/knowledge-base/integration?hsLang=en) - [Software](https://reach-robotics.com/knowledge-base/software?hsLang=en) - [Troubleshooting](https://reach-robotics.com/knowledge-base/troubleshooting?hsLang=en) - [Accessories](https://reach-robotics.com/knowledge-base/accessories?hsLang=en) - [Theory](https://reach-robotics.com/knowledge-base/theory?hsLang=en) - [Training](https://reach-robotics.com/knowledge-base/training?hsLang=en) - [Support & Servicing](https://reach-robotics.com/knowledge-base/support-servicing?hsLang=en) [![Chill listening crop-3](https://reach-robotics.com/hs-fs/hubfs/Reach.Robotics-Logo.Navy-01.png?width=126&height=41&name=Reach.Robotics-Logo.Navy-01.png "Chill listening crop-3")](https://www.reachrobotics.com) 3-5 Queen Street, Glebe, NSW 2037, Australia Copyright © 2026, Reach Robotics