Push to Talk (PTT) over Cellular (PoC), using mobile 3G / 4G / 5G or Wi-Fi networks, is the modern way of instant voice group communication.
The Group PTT feature provides the equivalent service of a traditional two way radio (walkie talkie). GroupTalk Group PTT benefit from basically unlimited geographical coverage and crystal clear voice communication and text messaging.
GroupTalk users select a PTT group (sometimes referred to as a "channel" as in the analog radio world) from the list of available groups. Everyone in that PTT group can instantaiously communicate with each other using voice at a push of a button. Push to Talk is half duplex, thus only one user can talk at a time.
Mobile users can only select one primary group at a time while dispatchers using the service on a PC can participate in multiple groups simultaneously. Additionally, mobile users can "scan" groups in the background. Incoming voice on scanned groups will be heard when there is no voice traffic in the primary group. All communication is in real time. User access to the PTT groups are managed centrally on the web.