https://hfunderground.com/wiki/index.php?title=Wi-Fi&feed=atom&action=historyWi-Fi - Revision history2024-03-29T00:07:39ZRevision history for this page on the wikiMediaWiki 1.16.5https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=15103&oldid=prevR4002: /* 900 MHz (802.11ah) */2023-05-20T13:30:50Z<p><span class="autocomment">900 MHz (802.11ah)</span></p>
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<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 13:30, 20 May 2023</td>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region). </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region). </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz [[LoRa]] and related [[mesh network]] [[Meshtastic]]<del class="diffchange diffchange-inline">system</del>, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz [[LoRa]] and related [[mesh <ins class="diffchange diffchange-inline">network|</ins>network]] <ins class="diffchange diffchange-inline">systems such as </ins>[[Meshtastic]], vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The [[Nationwide_Public_Safety_Interoperability#700_MHz_band|700 MHz]] and [[Nationwide_Public_Safety_Interoperability#800_MHz_band|800 MHz]] bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE, 5G (and earlier generation) mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The [[Nationwide_Public_Safety_Interoperability#700_MHz_band|700 MHz]] and [[Nationwide_Public_Safety_Interoperability#800_MHz_band|800 MHz]] bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE, 5G (and earlier generation) mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=15102&oldid=prevR4002: /* 900 MHz (802.11ah) */2023-05-20T13:29:01Z<p><span class="autocomment">900 MHz (802.11ah)</span></p>
<table style="background-color: white; color:black;">
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<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 13:29, 20 May 2023</td>
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<td colspan="2" class="diff-lineno">Line 6:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region). </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region). </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz <ins class="diffchange diffchange-inline">[[</ins>LoRa<ins class="diffchange diffchange-inline">]] and related [[mesh network]] [[Meshtastic]]</ins>system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The [[Nationwide_Public_Safety_Interoperability#700_MHz_band|700 MHz]] and [[Nationwide_Public_Safety_Interoperability#800_MHz_band|800 MHz]] bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE, 5G (and earlier generation) mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The [[Nationwide_Public_Safety_Interoperability#700_MHz_band|700 MHz]] and [[Nationwide_Public_Safety_Interoperability#800_MHz_band|800 MHz]] bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE, 5G (and earlier generation) mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=15098&oldid=prevR4002: /* 900 MHz (802.11ah) */2023-05-18T18:05:10Z<p><span class="autocomment">900 MHz (802.11ah)</span></p>
<table style="background-color: white; color:black;">
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<td colspan='2' style="background-color: white; color:black;">Revision as of 18:05, 18 May 2023</td>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The [[Nationwide_Public_Safety_Interoperability#700_MHz_band|700 MHz]] and [[Nationwide_Public_Safety_Interoperability#800_MHz_band|800 MHz]] bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE <del class="diffchange diffchange-inline">and </del>5G mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The [[Nationwide_Public_Safety_Interoperability#700_MHz_band|700 MHz]] and [[Nationwide_Public_Safety_Interoperability#800_MHz_band|800 MHz]] bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE<ins class="diffchange diffchange-inline">, </ins>5G <ins class="diffchange diffchange-inline">(and earlier generation) </ins>mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=15097&oldid=prevR4002: /* 900 MHz (802.11ah) */2023-05-18T18:04:52Z<p><span class="autocomment">900 MHz (802.11ah)</span></p>
<table style="background-color: white; color:black;">
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<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 18:04, 18 May 2023</td>
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<td colspan="2" class="diff-lineno">Line 8:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The 700 MHz and 800 MHz bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE and 5G mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The <ins class="diffchange diffchange-inline">[[Nationwide_Public_Safety_Interoperability#700_MHz_band|</ins>700 MHz<ins class="diffchange diffchange-inline">]] </ins>and <ins class="diffchange diffchange-inline">[[Nationwide_Public_Safety_Interoperability#800_MHz_band|</ins>800 MHz<ins class="diffchange diffchange-inline">]] </ins>bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE and 5G mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=15096&oldid=prevR4002: /* 900 MHz (802.11ah) */2023-05-18T18:03:48Z<p><span class="autocomment">900 MHz (802.11ah)</span></p>
<table style="background-color: white; color:black;">
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<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 18:03, 18 May 2023</td>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>==900 MHz (802.11ah)==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>==900 MHz (802.11ah)==</div></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region). <ins class="diffchange diffchange-inline"> </ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including [[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|33cm]] amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">The 700 MHz and 800 MHz bands are allocated to land mobile radio services, including public safety radio systems, 4G, 4G LTE and 5G mobile cellular networks, as well as other services - depending on the local frequency allocations and other regulations. </ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=15089&oldid=prevR4002: /* 2.4 GHz (802.11b/g/n/ax) */2023-05-18T17:58:02Z<p><span class="autocomment">2.4 GHz (802.11b/g/n/ax)</span></p>
<table style="background-color: white; color:black;">
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr valign='top'>
<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 17:58, 18 May 2023</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 73:</td>
<td colspan="2" class="diff-lineno">Line 73:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Includes 802.11b, 802.11g, 802.11n, 802.11ax wireless specification. Look at 2.45 GHz or 2450 MHz center frequency on a [[SDR]] waterfall or spectrum analyzer and you'll see the insanity. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Includes 802.11b, 802.11g, 802.11n, 802.11ax wireless specification. Look at 2.45 GHz or 2450 MHz center frequency on a [[SDR]] waterfall or spectrum analyzer and you'll see the insanity. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The 2.4 GHz band is '''extremely congested''' in many areas with numerous devices using this frequency band, including high power [[ISM]] devices, [[Cordless_telephone|cordless telephones]], Bluetooth, analog and digital wireless video link systems (video senders), baby monitors, wireless intercoms, wireless microphone systems, short-range [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|data]] and audio/video link systems of various power output levels and bandwidths...along with dozens of other uses, including [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] (RC) systems, 2.4G drone [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] systems and countless others. </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The 2.4 GHz band is '''extremely congested''' in many areas with numerous devices using this frequency band, including high power [[ISM]] devices, [[Cordless_telephone|cordless telephones]], Bluetooth, analog and digital wireless video link systems (video senders)<ins class="diffchange diffchange-inline">, general [[SRD|Short Range Devices]]</ins>, baby monitors, wireless intercoms, wireless microphone systems, short-range [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|data]] and audio/video link systems of various power output levels and bandwidths...along with dozens of other uses, including [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] (RC) systems, 2.4G drone [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] systems and countless others. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The availability of the 5 GHz band for WLAN / WiFi applications, the 900 MHz band and/or the 5.8 GHz band for cordless telephones and the 1.9 GHz / 1900 MHz [[DECT]] band for cordless telephones, wireless intercoms (many use [[FRS#Wireless_Intercom_Systems_FM_Intercoms|FRS]] frequencies at considerably lower power levels), baby [[Part_15#15.235_Operation_within_the_band_49.82-49.90_MHz.|monitors]], business cordless phone PBX systems, etc. means that some of the interference on 2.4 GHz could be eliminated with careful planning and frequency/channel use coordination among local users. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The availability of the 5 GHz band for WLAN / WiFi applications, the 900 MHz band and/or the 5.8 GHz band for cordless telephones and the 1.9 GHz / 1900 MHz [[DECT]] band for cordless telephones, wireless intercoms (many use [[FRS#Wireless_Intercom_Systems_FM_Intercoms|FRS]] frequencies at considerably lower power levels), baby [[Part_15#15.235_Operation_within_the_band_49.82-49.90_MHz.|monitors]], business cordless phone PBX systems, etc. means that some of the interference on 2.4 GHz could be eliminated with careful planning and frequency/channel use coordination among local users. </div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=15088&oldid=prevR4002: /* 2.4 GHz (802.11b/g/n/ax) */2023-05-18T17:57:24Z<p><span class="autocomment">2.4 GHz (802.11b/g/n/ax)</span></p>
<table style="background-color: white; color:black;">
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr valign='top'>
<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 17:57, 18 May 2023</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 73:</td>
<td colspan="2" class="diff-lineno">Line 73:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Includes 802.11b, 802.11g, 802.11n, 802.11ax wireless specification. Look at 2.45 GHz or 2450 MHz center frequency on a [[SDR]] waterfall or spectrum analyzer and you'll see the insanity. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Includes 802.11b, 802.11g, 802.11n, 802.11ax wireless specification. Look at 2.45 GHz or 2450 MHz center frequency on a [[SDR]] waterfall or spectrum analyzer and you'll see the insanity. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The 2.4 GHz band is '''extremely congested''' in many areas with numerous devices using this frequency band, including high power [[ISM]] devices, [[Cordless_telephone|cordless telephones]], Bluetooth, analog and digital wireless video link systems (video senders), baby monitors, wireless intercoms, wireless microphone systems, short-range <del class="diffchange diffchange-inline">[[</del>[[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|data]] and audio/video link systems of various power output levels and bandwidths...along with dozens of other uses, including [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] (RC) systems, 2.4G drone [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] systems and countless others. </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The 2.4 GHz band is '''extremely congested''' in many areas with numerous devices using this frequency band, including high power [[ISM]] devices, [[Cordless_telephone|cordless telephones]], Bluetooth, analog and digital wireless video link systems (video senders), baby monitors, wireless intercoms, wireless microphone systems, short-range [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|data]] and audio/video link systems of various power output levels and bandwidths...along with dozens of other uses, including [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] (RC) systems, 2.4G drone [[Remote_Control#2.4_GHz_RC_Frequencies|remote control]] systems and countless others. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The availability of the 5 GHz band for WLAN / WiFi applications, the 900 MHz band and/or the 5.8 GHz band for cordless telephones and the 1.9 GHz / 1900 MHz [[DECT]] band for cordless telephones, wireless intercoms (many use [[FRS#Wireless_Intercom_Systems_FM_Intercoms|FRS]] frequencies at considerably lower power levels), baby [[Part_15#15.235_Operation_within_the_band_49.82-49.90_MHz.|monitors]], business cordless phone PBX systems, etc. means that some of the interference on 2.4 GHz could be eliminated with careful planning and frequency/channel use coordination among local users. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The availability of the 5 GHz band for WLAN / WiFi applications, the 900 MHz band and/or the 5.8 GHz band for cordless telephones and the 1.9 GHz / 1900 MHz [[DECT]] band for cordless telephones, wireless intercoms (many use [[FRS#Wireless_Intercom_Systems_FM_Intercoms|FRS]] frequencies at considerably lower power levels), baby [[Part_15#15.235_Operation_within_the_band_49.82-49.90_MHz.|monitors]], business cordless phone PBX systems, etc. means that some of the interference on 2.4 GHz could be eliminated with careful planning and frequency/channel use coordination among local users. </div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=14804&oldid=prevR4002: /* 900 MHz (802.11ah) */2023-02-21T14:59:04Z<p><span class="autocomment">900 MHz (802.11ah)</span></p>
<table style="background-color: white; color:black;">
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr valign='top'>
<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 14:59, 21 February 2023</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 6:</td>
<td colspan="2" class="diff-lineno">Line 6:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region).</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including 33cm amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including <ins class="diffchange diffchange-inline">[[Ham_radio#Amateur_Radio_Bands_VHF_UHF_and_up|</ins>33cm<ins class="diffchange diffchange-inline">]] </ins>amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum ([[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|FHSS]]) [[Business_Radio|business radio]] two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio systems]] as well as being an [[ISM]] (FCC Rules Part 18).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=14803&oldid=prevR4002: /* 900 MHz (802.11ah) */2023-02-21T14:58:30Z<p><span class="autocomment">900 MHz (802.11ah)</span></p>
<table style="background-color: white; color:black;">
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr valign='top'>
<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 14:58, 21 February 2023</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 6:</td>
<td colspan="2" class="diff-lineno">Line 6:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region).</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>802.11ah operates in sub-gigahertz unlicensed bands. While it is referred to as "900 MHz" it actually covers various bands including the 700 MHz band, 800 MHz band (including the European Short Range Device - SRD - [[SRD860]] band allocations) and 900 MHz band. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including 33cm amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum (FHSS) [[Business_Radio|business radio]] systems as well as being an [[ISM]] (FCC Rules Part 18).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>It is important to note that the 902-928 MHz band is allocated to numerous other services, including 33cm amateur radio band, [[cordless telephone]] systems, license-free [[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|telemetry/data link]] systems, 915 MHz LoRa system, vehicle transponder systems, train and railroad telemetry systems and [[Part_15#15.247_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_and_5725-5850_MHz.|unlicensed]] frequency hopping spread spectrum (<ins class="diffchange diffchange-inline">[[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|</ins>FHSS<ins class="diffchange diffchange-inline">]]</ins>) [[Business_Radio|business radio]] <ins class="diffchange diffchange-inline">two-way [[Motorola_DTR_series_900_MHz_frequency_hopping_hopsets|radio </ins>systems<ins class="diffchange diffchange-inline">]] </ins>as well as being an [[ISM]] (FCC Rules Part 18).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The following sub-bands are defined in the 802.11ah specifications:</div></td></tr>
</table>R4002https://hfunderground.com/wiki/index.php?title=Wi-Fi&diff=14093&oldid=prevR4002: /* 2.4 GHz (802.11b/g/n/ax) */2022-06-23T19:15:17Z<p><span class="autocomment">2.4 GHz (802.11b/g/n/ax)</span></p>
<table style="background-color: white; color:black;">
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr valign='top'>
<td colspan='2' style="background-color: white; color:black;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black;">Revision as of 19:15, 23 June 2022</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 73:</td>
<td colspan="2" class="diff-lineno">Line 73:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Includes 802.11b, 802.11g, 802.11n, 802.11ax wireless specification. Look at 2.45 GHz or 2450 MHz center frequency on a [[SDR]] waterfall or spectrum analyzer and you'll see the insanity. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Includes 802.11b, 802.11g, 802.11n, 802.11ax wireless specification. Look at 2.45 GHz or 2450 MHz center frequency on a [[SDR]] waterfall or spectrum analyzer and you'll see the insanity. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The 2.4 GHz band is '''extremely congested''' in many areas with numerous devices using this frequency band, including high power [[ISM]] devices, [[Cordless_telephone|cordless telephones]], Bluetooth, analog and digital wireless video link systems (video senders), baby monitors, wireless intercoms, wireless microphone systems, short-range [[[[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.<del class="diffchange diffchange-inline">|</del>|data]] and audio/video link systems of various power output levels and bandwidths...along with dozens of other uses, including remote control (RC) systems, 2.4G drone remote control systems and countless others. </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The 2.4 GHz band is '''extremely congested''' in many areas with numerous devices using this frequency band, including high power [[ISM]] devices, [[Cordless_telephone|cordless telephones]], Bluetooth, analog and digital wireless video link systems (video senders), baby monitors, wireless intercoms, wireless microphone systems, short-range [[[[Part_15#15.249_-_Operation_within_the_bands_902-928_MHz.2C_2400-2483.5_MHz.2C_5725-5875_MHz.2C_and_24.0-24.25_GHz.|data]] and audio/video link systems of various power output levels and bandwidths...along with dozens of other uses, including <ins class="diffchange diffchange-inline">[[Remote_Control#2.4_GHz_RC_Frequencies|</ins>remote control<ins class="diffchange diffchange-inline">]] </ins>(RC) systems, 2.4G drone <ins class="diffchange diffchange-inline">[[Remote_Control#2.4_GHz_RC_Frequencies|</ins>remote control<ins class="diffchange diffchange-inline">]] </ins>systems and countless others. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The availability of the 5 GHz band for WLAN / WiFi applications, the 900 MHz band and/or the 5.8 GHz band for cordless telephones and the 1.9 GHz / 1900 MHz [[DECT]] band for cordless telephones, wireless intercoms (many use [[FRS#Wireless_Intercom_Systems_FM_Intercoms|FRS]] frequencies at considerably lower power levels), baby [[Part_15#15.235_Operation_within_the_band_49.82-49.90_MHz.|monitors]], business cordless phone PBX systems, etc. means that some of the interference on 2.4 GHz could be eliminated with careful planning and frequency/channel use coordination among local users. </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The availability of the 5 GHz band for WLAN / WiFi applications, the 900 MHz band and/or the 5.8 GHz band for cordless telephones and the 1.9 GHz / 1900 MHz [[DECT]] band for cordless telephones, wireless intercoms (many use [[FRS#Wireless_Intercom_Systems_FM_Intercoms|FRS]] frequencies at considerably lower power levels), baby [[Part_15#15.235_Operation_within_the_band_49.82-49.90_MHz.|monitors]], business cordless phone PBX systems, etc. means that some of the interference on 2.4 GHz could be eliminated with careful planning and frequency/channel use coordination among local users. </div></td></tr>
</table>R4002