1 Push-to talk (PTT) talk-group interoperability is accomplished by connecting two-way radio “donor” devices to the RIU (Radio Interface Unit), which connects to the Mobile Extension Feature Appliance.
2 The donor devices act like a transceiver, with the field devices communicating with the donor. Each talk-group requires a dedicated two-way radio donor.
3 Push-to-Talk Express communications are carried over the enterprise WLAN/LAN to Radio Link Express through the IP network. Radio Link Express then routes communication to the two-way donor device for the associated talk group, which in turn, sends communications out to the user two-way devices. The opposite flow applies for two-way radio to Push-to-Talk Express Talk Groups.