This is a great question.  We have mentioned “dual band amplifiers” in the past.  When we talk about dual band we are generally referring to an amplifier.  This means the amplifier is built to amplify/enhance signals for both the 800 MHz cellular or the 1900 MHz PCS frequencies.

Each frequency range has a band designator and each range of frequencies behaves differently and performs different functions. The frequency spectrum is shared by civil, government, and military users of all nations according to International Telecommunications Union (ITU) radio regulations.

For communications purposes, the usable frequency spectrum now extends from about 3Hz to about 300GHz. There are also some experiments at about 100THz where research on laser communications is taking place but we won’t discuss this now. This range from 3Hz to 300GHz has been split into regions.

In a telecommunications network the backhaul portion of the network comprises the intermediate links between the backbone, of the network and the small subnetworks at the “edge” of the entire hierarchical network.  An example would be: cell phones communicating with a single cell tower constitute a local subnetwork, the connection between the cell tower and the rest of the world begins with a backhaul link to the core of the telecommunications network.

Visualizing the entire hierarchical network as a human skeleton, the core network would be the spine, the backhaul links would be the limbs, the edge networks would be the hands and feet, and the individual links within those edge networks would be the fingers and toes.

The objective in this type of solutions is to transmit data from several distribution/access points to one centralized point of presences.  This technology offers great benefit to enterprise, particularly campus style environments such as hospitals and universities.  Harris Communications offers both licensed and unlicensed point to point and multi point solutions.

Harris Communications implements a multi- carrier repeater solution for the physicians lounge at Cleveland Regional Medical Center

Shelby, NC (February 23, 2009) Cleveland Regional Medical Center was seeking in-building cellular signal enhancement for the physicians lounge to facilitate cellular signals in a confined area. As an answer, Harris Communications custom designed and implemented the Distributive Antenna Solution (DAS) for all carriers to ensure adequate in-building cellular phone signal for the physicians lounge and surrounding area.