Interference from Wireless Devices into Network Equipment Inside COs Between 450 and 914 MHz

Abstract

The increasing need for wireless communication in or near telephone exchange facilities has raised concern for sustained integrity of telecommunications switching equipment operation through immunity to electromagnetic interference (EMI). In addition to portable communication systems (PCS), several wireless devices such as cordless phones, handi-talkies, and other portable transceivers may be used near telephone company Central Offices (COs), huts, and remote nodes at customer sites. The intent of this work is to perform a realistic analysis by considering the presence of equipment cabinets and other scattering objects inside a CO and to better quantify the electromagnetic compatibility of wireless transmitting devices with switching equipment inside telephone company facilities. Measurements have been performed to determine the immunity of a few network switches in the presence of wireless devices.