Nortel T7406 Installation Manual

Contents

Provisioning the T7406 / 7T7406 Installation GuideProvisioning the T7406This chapter provides specification and provisioning information forthe T7406 cordless system.The T7406 is a Frequency Hopping Spread Spectrum (FHSS) cordlesstelephone. The benefits of this technology are: improved range,robustness and, less susceptibility to interference, fading and multipath.The use of a common wall-mounted base station for multiple handsetsallows you to position the base antennas for maximum performance andcoverage. The indoor range of the T7406 is 95 meters (300 feet) in atypical office environment. This range may vary with differingenvironments.Operational BandwidthsThe T7406 cordless telephone operates in the ISM (Industrial,Scientific, and Medical) 902-928 MHz band. The T7406 divides theISM band into two sets of operating frequencies to allow thecoexistence of other ISM devices. Examples of these products are SKUscanners and remote controls for products such as garage door openersand home theatre systems. Note that, since the T7406 is a frequencyhopper, it uses at least half of the available frequencies in the ISM bandfor operation and can make it difficult for other 900 MHz devices tooperate correctly. The following table identifies the frequencies usedfor the upper and lower bands of operation:• Lower: 902 - 915 MHz• Upper: 915.1 - 928 MHzThese bands are selectable for each base station through dip switcheslocated on the back of the T7406 base station. Each base stationsupports up to three handsets. Selection of the correct band foroperation may minimize interference between devices.Operational ParametersFor example, with a configuration of six handsets, two base stations arerequired (three handsets per base station). One base station will be set tothe upper band, and the other base station will be set to the lower band.