Free space optics (also known as "wireless fiber") enables enterprises to connect buildings at distances of several hundred meters (roughly a few thousand feet) over a point-to-point wireless laser link. Free space optics operates at speeds of 100 Mbps or higher and is traditionally used to connect LANs at the different sites. RAD's IPmux TDM over IP (TDMoIP) gateway delivers traditional TDM-based voice and signaling protocols to connect PBX circuits across the Ethernet-based laser transport. The TDMoIP solution enables simple transmission of voice traffic over the laser link without the need for costly upgrades to the existing infrastructure. Moreover, the transparent transport method provided by RAD's TDMoIP technology easily extends traditional voice switches to the customer PBXs without the expense and complexity of upgrading to VoIP or leasing costly E1/T1 lines.

In the scenario shown here, the Cisco router can be used to transmit LAN traffic while TDMoIP delivers legacy services.

Other TDMoIP products, such as RAD's Megaplex, connect FXO and FXS interfaces as well as PBX traffic over Ethernet/IP-based free space optics.