If your mine or industrial operation has an existing Wi-Fi-enabled network, Matrix has an easy, low-cost way to add individual, group or area voice communications through VoIP or RoIP handsets. Icom’s WLAN-based radio system offers scalable, license-free communication that uses simple, standardized wireless network products.
The Icom IP100H Radio Phone is powerful and one of the smallest professional radios available.
Icom’s IP1000C wireless network system link keeps track of the radios in your network and allows communications with third-party WLAN access points.
"License-Free Full-Duplex Voice Communication Over Wireless LAN and IP Networks"