800 MHz
Incumbent 800 SMR systems are entitled to co-channel protection by EA licensees. Specifically, EA licensees must provide protection to incumbents by locating stations at least 70 miles (113 km) from incumbent facilities or by complying with the short-spacing rules. See
rule 90.621.
Incumbent systems are not allowed to expand beyond existing interference contours unless they obtain the concurrence of the EA licensee for the relevant channels or acquire the EA license. See
rule 90.693.
900 MHz
Incumbent 900 SMR systems are entitled to co-channel protection by MTA licensees. Incumbent systems, however, are not allowed to expand beyond existing service areas unless they obtain the concurrence of the MTA licensee for the relevant channels or acquire the MTA license. See
rule 90.663, rule 90.621, and rule 90.667.
Requires coverage to at least 1/3 of the population within three years and at least 2/3 coverage of the population within five years. Alternatively, within five years, a showing of “substantial service” is required. See
rule 90.685 (800 MHz) or rule 90.665 (900 MHz).
An SMR licensee with facilities that have discontinued operations for 90 continuous days is presumed to have permanently discontinued operations. See
rule 90.631(f)
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