Hybrid Network
TUNet is a wireless RF (Radio Frequency) network that combines a 220 MHz wide area network (WAN) with a 900 MHz local area network (LAN). The result is a bi-directional communications system that is effective, affordable, flexibly deployed, and serves both rural and urban service areas. It is a self-initiating, self-healing network to ensure uninterrupted communications.

The 220 MHz frequency is a licensed spectrum used by many utilities for SCADA applications; the 900 MHz frequency is an unlicensed spread spectrum shared by industrial and scientific applications.

How it works
An endpoint—meter, recloser, capacitor— is fitted with a TUNet device that contains an optical reader for measuring voltage and consumption, and a 900 MHz radio modem that communicates with the LAN. Each TUNet LAN device can send data and receive commands.

A WAN Sharkfin serves as the communications router between the LAN and the radio tower, allowing bi-directional communication between the control center and individual LAN devices.

An antenna is mounted on a radio tower. A TUNet Network Controller located at the tower's base station sends and receives commands via the 220 MHz frequency.The utility/municipality can also use fiber, cellular, WiFi or other Ethernet connection for WAN transmission.

The tower connects to a Network Server located at the utility via TCP/IP. Incoming and outgoing data is relayed through this central server. Data can be easily integrated into MDM, OMS, CIS GIS and other applications as well as displayed on a Web browser.

> TUNet Diagram :: 11x17 :: 750k PDF