Sec. 22.655  Channel usage.

    The FCC is redesignating the public mobile channels in the 470-512 
MHz range from trunked mobile operation to point-to-multipoint operation 
as the demand for trunked mobile service decreases.
    (a) The licensees in each market shall measure channel usage at 
least once every 3 months. These measurements shall be reported to the 
FCC within 30 days. Measurements shall be taken during the busiest 12-
hour periods on 3 days (within a 7-day period) having normal usage. The 
information must be reported separately for each of the 3 days selected, 
must be reported by dates, and must disclose the following:
    (1) The number of mobile units in service during each of the days 
specified;
    (2) The number of calls completed each hour;
    (3) The total number of minutes during each hour that the channels 
were utilized for communications by the mobile units;
    (4) The average channel usage for the busiest hour for the 3 days 
measured; and
    (5) Any additional information that more accurately reflects channel 
usage.
    (b) If the measured probability of blocking decreases below 25%, the 
FCC will redesignate channels not needed to maintain blocking at 25% or 
less. The number of channels needed to maintain blocking below 25% will 
be determined from the channel usage reports and the Erlang C tables.
    (c) Although two or more channels are necessary to provide trunked 
service, the FCC may, pursuant to this section, reduce to one the number 
of channels assigned. In such cases, the licensee may provide non-
trunked two-way public mobile service on the one remaining channel.