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Narrowband Dates
·
Texas Law 1
and Texas Law 2 should no longer be referred to as inter-city
mobile, inter-city
base or any other name except as identified by this plan.
·
Texas Law 1,
2 & 3; Texas Fire 1, 2 & 3; Texas Medical 1 and Texas Air 2 are
all subject to the
12-20-2004 ruling by the FCC that mandates narrowband radio
equipment below 512 MHz
and sets conversion deadlines which make wide-band operations
secondary to narrow-band
operations on January 1, 2013. If a wide-band channel creates
interference to a narrow-band
user after this date, it will be required to cease operation.
o
After
January 1, 2013, all systems must have converted either to 12.5
kHz
bandwidth or to a technology that provides one voice channel per
12.5 kHz
or operates at a data rate of 4800 bps per 6.25 kHz of
bandwidth.
o
New FCC
license applications for 25 kHz bandwidth will be accepted until
January 1, 2011. After this date, applications for greater than
12.5 kHz
bandwidth will be accepted only if the equipment meets the
efficiency
standard of one voice channel/12.5 kHz bandwidth or 4800
bps/6.25 kHz
(9600 bps/12.5 kHz; 19.2 Kbps for 25 kHz).
o
Modifications of existing 25 kHz systems will be accepted by the
FCC until
January 1, 2011. After this date, applications for
modifications to 25 kHz
systems which result in an expanded service contour will be
accepted on
if the equipment meets the efficiency standard of one voice
channel/12.5 kHz
bandwidth or for data 4800 bps/6.25 kHz (9600 bps/12.5 kHz; 19.2
Kbps for 25 kHz).
o
25 kHz
equipment can be manufactured and imported until January 1,
2011.
After this date, equipment operating at greater than 12.5 kHz
bandwidth
must meet the efficiency standard of one voice channel per 12.5
kHz
bandwidth or 4800 pbs/6.25 kHz.
o FCC
rule 90.203(j) has been amended to allow certification of
equipment
operating at 25 kHz bandwidth after January 1, 2005 if it meets
the efficiency
standards listed above.
o The
FCC also revised its rules to exempt Part 90 paging-only
frequencies from
the narrowbanding requirements. These are specifically
designated frequencies
for paging only operations. Dedicated paging transmitters are
not exempt from
the interference rules. If a jurisdiction uses a voice
transmitter in a secondary
mode to page from, care should be taken to assure that future
paging operations
are not affected.
·
Efficient
and effective interoperability requires that all of the
equipment that is used for
emergencies operate within the current FCC rules, regulations
and guidelines. In order
to assure compliance, it is strongly recommended that all radios
and ancillary equipment are
tested on an annual basis as part of a documented, routine
maintenance program.
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