GMRS - Revision history

R4002: /* GMRS Simplex Repeaters */

2026-04-27T13:36:38Z

GMRS Simplex Repeaters

← Older revision		Revision as of 13:36, 27 April 2026
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	*462.700 MHz		*462.700 MHz
	*462.725 MHz		*462.725 MHz
-
-
-	*FRS Channel 15 - 462.5500 MHz - 67.0 Hz, 71.9 Hz, 107.2 Hz, 110.9 Hz, 123.0 Hz, 136.5 Hz, 162.2 Hz, D731N, D732N, D743N
-
-	*FRS Channel 16 - 462.5750 MHz - 67.0 Hz, 110.9 Hz, 114.8 Hz, 118.8 Hz, 136.5 Hz, 203.5 Hz, D023N, D143N, D654N, D731N, D732N, D743N, D743I
-
-	*FRS Channel 17 - 462.6000 MHz - 67.0 Hz, 110.9 Hz, 114.8 Hz, 118.8 Hz, 136.5 Hz, 186.2 Hz, 241.8 Hz, D455N, D332I
-
-	*FRS Channel 18 - 462.6250 MHz - 67.0 Hz, 110.9 Hz, 123.0 Hz, 127.3 Hz, 136.5 Hz, 186.2 Hz, D023N, D156N
-
-	*FRS Channel 19 - 462.6500 MHz - 67.0 Hz, 110.9 Hz, 127.3 Hz, 136.5 Hz, 186.2 Hz, 218.1 Hz, 225.7 Hz, D023N, D025N, D351N, D243I
-
-	*FRS Channel 20 - 462.6750 MHz - 67.0 Hz, 110.9 Hz, 127.3 Hz, 131.8 Hz, 136.5 Hz, 141.3 Hz, 146.2 Hz, 186.2 Hz, 199.5 Hz, D023N, D172N, D606N
-
-	*FRS Channel 21 - 462.7000 MHz - 67.0 Hz, 100.0 Hz, 118.8 Hz, 131.8 Hz, 136.5 Hz, 186.2 Hz, 192.8 Hz, 206.5 Hz, D155N, D743N, D731I
-
-	*FRS Channel 22 - 462.7250 MHz - 67.0 Hz, 110.9 Hz, 136.5 Hz, 186.2 Hz, 250.3 Hz, 254.1 Hz, D223N, D252N, D734N, D743N, D754N, D461I, D462I

	== GMRS Channel Names Frequency Designators ==		== GMRS Channel Names Frequency Designators ==

R4002: /* GMRS Simplex Repeaters */

2026-04-27T13:36:24Z

GMRS Simplex Repeaters

← Older revision		Revision as of 13:36, 27 April 2026
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	*462.700 MHz		*462.700 MHz
	*462.725 MHz		*462.725 MHz
		+
		+
		+	*FRS Channel 15 - 462.5500 MHz - 67.0 Hz, 71.9 Hz, 107.2 Hz, 110.9 Hz, 123.0 Hz, 136.5 Hz, 162.2 Hz, D731N, D732N, D743N
		+
		+	*FRS Channel 16 - 462.5750 MHz - 67.0 Hz, 110.9 Hz, 114.8 Hz, 118.8 Hz, 136.5 Hz, 203.5 Hz, D023N, D143N, D654N, D731N, D732N, D743N, D743I
		+
		+	*FRS Channel 17 - 462.6000 MHz - 67.0 Hz, 110.9 Hz, 114.8 Hz, 118.8 Hz, 136.5 Hz, 186.2 Hz, 241.8 Hz, D455N, D332I
		+
		+	*FRS Channel 18 - 462.6250 MHz - 67.0 Hz, 110.9 Hz, 123.0 Hz, 127.3 Hz, 136.5 Hz, 186.2 Hz, D023N, D156N
		+
		+	*FRS Channel 19 - 462.6500 MHz - 67.0 Hz, 110.9 Hz, 127.3 Hz, 136.5 Hz, 186.2 Hz, 218.1 Hz, 225.7 Hz, D023N, D025N, D351N, D243I
		+
		+	*FRS Channel 20 - 462.6750 MHz - 67.0 Hz, 110.9 Hz, 127.3 Hz, 131.8 Hz, 136.5 Hz, 141.3 Hz, 146.2 Hz, 186.2 Hz, 199.5 Hz, D023N, D172N, D606N
		+
		+	*FRS Channel 21 - 462.7000 MHz - 67.0 Hz, 100.0 Hz, 118.8 Hz, 131.8 Hz, 136.5 Hz, 186.2 Hz, 192.8 Hz, 206.5 Hz, D155N, D743N, D731I
		+
		+	*FRS Channel 22 - 462.7250 MHz - 67.0 Hz, 110.9 Hz, 136.5 Hz, 186.2 Hz, 250.3 Hz, 254.1 Hz, D223N, D252N, D734N, D743N, D754N, D461I, D462I

	== GMRS Channel Names Frequency Designators ==		== GMRS Channel Names Frequency Designators ==

R4002: /* GMRS Simplex Repeaters */

2026-04-27T13:35:55Z

GMRS Simplex Repeaters

← Older revision		Revision as of 13:35, 27 April 2026
Line 120:		Line 120:
	Simplex repeaters are also becoming popular on GMRS. These systems are store-and-forward devices, often called "parrots". Simplex repeaters record a transmission received, and then play the recorded transmission on the same frequency. They are considerably less complex and therefore less expensive than traditional repeaters. They may be used on the 8 GMRS repeater output frequencies (the high power GMRS 50 watt channels).		Simplex repeaters are also becoming popular on GMRS. These systems are store-and-forward devices, often called "parrots". Simplex repeaters record a transmission received, and then play the recorded transmission on the same frequency. They are considerably less complex and therefore less expensive than traditional repeaters. They may be used on the 8 GMRS repeater output frequencies (the high power GMRS 50 watt channels).

-	Anyone setting up a simplex repeater should determine which, if any, regular GMRS repeaters are operating in their area and use that information to determine which frequency to use and which CTCSS or DCS tone/codes to use to avoid interference and to avoid the undesirable situation of a simplex repeater re-transmitting traffic from a GMRS repeater output. If you set up a simplex repeater, use of CTCSS is strongly recommended, avoiding use of the same CTCSS tones or DCS codes that are used by GMRS repeaters in your area as well as commonly used CTCSS tones / DCS codes on channels 15-22 to avoid repeating unintended FRS or GMRS simplex traffic.	+	Anyone setting up a simplex repeater should determine which, if any, regular GMRS repeaters are operating in their area and use that information to determine which frequency to use and which CTCSS or DCS tone/codes to use to avoid interference and to avoid the undesirable situation of a simplex repeater re-transmitting traffic from a GMRS repeater output. If you set up a simplex repeater, use of CTCSS is strongly recommended, avoiding use of the same CTCSS tones or DCS codes that are used by GMRS repeaters in your area as well as commonly used ([[FRS#CTCSS_.28PL.29_and_DCS_.28DPL.29_Tones_and_Codes_To_Avoid_on_FRS_and_GMRS_Channels\|popular]] and factory default) CTCSS tones / DCS codes on channels 15-22 to avoid repeating unintended FRS or GMRS simplex traffic.

	''Simplex repeaters use the same frequency for input and output.''		''Simplex repeaters use the same frequency for input and output.''

R4002: /* GMRS Simplex Repeaters */

2026-04-27T13:35:05Z

GMRS Simplex Repeaters

← Older revision		Revision as of 13:35, 27 April 2026
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	''Simplex repeaters use the same frequency for input and output.''		''Simplex repeaters use the same frequency for input and output.''

-	*462.550 MHz	+	*462.550 MHz
	*462.575 MHz		*462.575 MHz
	*462.600 MHz		*462.600 MHz

R4002: /* GMRS Repeater Tones */

2026-04-27T13:34:52Z

GMRS Repeater Tones

← Older revision		Revision as of 13:34, 27 April 2026
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	Some GMRS repeaters use so-called "split tone" operation. This means that the repeater input requires a different CTCSS tone (PL tone) than the repeater transmits on the output. In other cases, DCS is used on the input and CTCSS is transmitted on the output. Other examples include repeaters which require a CTCSS tone (PL tone) or a DCS code (DPL code, CDCSS code) on the input but are carrier squelch on the output.		Some GMRS repeaters use so-called "split tone" operation. This means that the repeater input requires a different CTCSS tone (PL tone) than the repeater transmits on the output. In other cases, DCS is used on the input and CTCSS is transmitted on the output. Other examples include repeaters which require a CTCSS tone (PL tone) or a DCS code (DPL code, CDCSS code) on the input but are carrier squelch on the output.
		+
		+
		+	== GMRS Simplex Repeaters ==
		+
		+	Simplex repeaters are also becoming popular on GMRS. These systems are store-and-forward devices, often called "parrots". Simplex repeaters record a transmission received, and then play the recorded transmission on the same frequency. They are considerably less complex and therefore less expensive than traditional repeaters. They may be used on the 8 GMRS repeater output frequencies (the high power GMRS 50 watt channels).
		+
		+	Anyone setting up a simplex repeater should determine which, if any, regular GMRS repeaters are operating in their area and use that information to determine which frequency to use and which CTCSS or DCS tone/codes to use to avoid interference and to avoid the undesirable situation of a simplex repeater re-transmitting traffic from a GMRS repeater output. If you set up a simplex repeater, use of CTCSS is strongly recommended, avoiding use of the same CTCSS tones or DCS codes that are used by GMRS repeaters in your area as well as commonly used CTCSS tones / DCS codes on channels 15-22 to avoid repeating unintended FRS or GMRS simplex traffic.
		+
		+	''Simplex repeaters use the same frequency for input and output.''
		+
		+	*462.550 MHz
		+	*462.575 MHz
		+	*462.600 MHz
		+	*462.625 MHz
		+	*462.650 MHz
		+	*462.675 MHz
		+	*462.700 MHz
		+	*462.725 MHz

	== GMRS Channel Names Frequency Designators ==		== GMRS Channel Names Frequency Designators ==

R4002: /* GMRS Repeaters */

2026-04-27T13:29:00Z

GMRS Repeaters

← Older revision		Revision as of 13:29, 27 April 2026
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	\| 22 \|\| 462.725 \|\| 467.725 \|\|		\| 22 \|\| 462.725 \|\| 467.725 \|\|
	\|}		\|}
-
-

	== GMRS Repeater Tones ==		== GMRS Repeater Tones ==

R4002: /* GMRS Repeater Tones */

2026-04-27T13:28:44Z

GMRS Repeater Tones

← Older revision		Revision as of 13:28, 27 April 2026
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	Just like with simplex-only FRS, there are some [[FRS#CTCSS_.28PL.29_and_DCS_.28DPL.29_Tones_and_Codes_To_Avoid_on_FRS_and_GMRS_Channels\|tone/frequency combinations which should be avoided]] to reduce the chance of interference from FRS simplex users on the same frequency. See the [[FRS]] page for more detailed information.		Just like with simplex-only FRS, there are some [[FRS#CTCSS_.28PL.29_and_DCS_.28DPL.29_Tones_and_Codes_To_Avoid_on_FRS_and_GMRS_Channels\|tone/frequency combinations which should be avoided]] to reduce the chance of interference from FRS simplex users on the same frequency. See the [[FRS]] page for more detailed information.

		+	Some GMRS repeaters use so-called "split tone" operation. This means that the repeater input requires a different CTCSS tone (PL tone) than the repeater transmits on the output. In other cases, DCS is used on the input and CTCSS is transmitted on the output. Other examples include repeaters which require a CTCSS tone (PL tone) or a DCS code (DPL code, CDCSS code) on the input but are carrier squelch on the output.

	== GMRS Channel Names Frequency Designators ==		== GMRS Channel Names Frequency Designators ==

R4002 at 20:43, 11 March 2026

2026-03-11T20:43:59Z

← Older revision		Revision as of 20:43, 11 March 2026
Line 5:		Line 5:
	''Not to be confused with the similarly named '''[[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|General Radio Service]]''' (official name for the 27 MHz [[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|CB radio]] service in Canada).''		''Not to be confused with the similarly named '''[[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|General Radio Service]]''' (official name for the 27 MHz [[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|CB radio]] service in Canada).''

-	~~== GMRS Frequencies GMRS Channels ==~~
-
-	GMRS (and by extension, FRS) evolved out of the original 465 MHz "Class A" [[CB]] service. Calling frequency 462.675 MHz CTCSS 141.3 Hz (sometimes referred to as the "travel channel" - FRS channel 20). See page for [[FRS]] for information about combined FRS/GMRS "bubble pack" radios. As of late 2017, the FCC legalized the 8 "GMRS only" 462 MHz frequencies as part of the FRS service, changing the number of shared frequencies from 7 to 15 and legalizing the use of all 22 channels for simplex use under the FRS rules. GMRS license holders are still granted higher transmit power privileges and use of repeaters under the new rules. See also, [[FRS#FRS_calling_frequencies_and_Preppers_Emergency_Preparedness_Recommended_Channel.2FCode_Combinations\|the FRS subpage for standardized calling channels, emergency channels]], etc.
-
-	Maximum power 50 watts on GMRS is except on shared narrow band channels (FRS channels 1-7) where maximum power is 5 watts. Wide band FM (25 kHz or 20K0F3E, 16K0F3E or [[Business_Radio#Emission_Designators\|similar]]) or narrow band FM (11K2F3E, 11K0F3E and several other emissions with even narrower bandwidths) allowed on the 16 GMRS only frequencies for repeater or simplex use. Low power mobile and portable radios generally use narrow FM for compatibility with other handheld FRS radios aimed at the consumer market.
-
-	Like the FRS service, the FCC permits use of digital transmissions on the GMRS service. Digital transmissions are limited to text messages, requests for text messages, group chat messages, in-range location "ping" transmissions to verify that a radio is still within range of another radio (automatic range transponder capability), GPS location transmissions, GPS location requests, etc.

	== GMRS Frequencies GMRS Channels ==		== GMRS Frequencies GMRS Channels ==
Line 48:		Line 41:

	Licensed GMRS users may transmit up to 50 watts on 462.550 MHz, 462.575 MHz, 462.600 MHz, 462.625 MHz, 462.650 MHz, 462.675 MHz, 462.700 MHz and 462.725 MHz (channels 15-22). GMRS users may use these frequencies for simplex (non-repeater) use or as repeater output frequencies. Because of the extensive simplex FRS use of all 22 channels, GMRS users are strongly encouraged to use CTCSS or DCS on any repeater pair and for simplex operations.		Licensed GMRS users may transmit up to 50 watts on 462.550 MHz, 462.575 MHz, 462.600 MHz, 462.625 MHz, 462.650 MHz, 462.675 MHz, 462.700 MHz and 462.725 MHz (channels 15-22). GMRS users may use these frequencies for simplex (non-repeater) use or as repeater output frequencies. Because of the extensive simplex FRS use of all 22 channels, GMRS users are strongly encouraged to use CTCSS or DCS on any repeater pair and for simplex operations.
		+
		+
		+	== GMRS History ==
		+
		+	GMRS (and by extension, FRS) evolved out of the original 465 MHz "Class A" [[CB]] service. Calling frequency 462.675 MHz CTCSS 141.3 Hz (sometimes referred to as the "travel channel" - FRS channel 20). See page for [[FRS]] for information about combined FRS/GMRS "bubble pack" radios. As of late 2017, the FCC legalized the 8 "GMRS only" 462 MHz frequencies as part of the FRS service, changing the number of shared frequencies from 7 to 15 and legalizing the use of all 22 channels for simplex use under the FRS rules. GMRS license holders are still granted higher transmit power privileges and use of repeaters under the new rules. See also, [[FRS#FRS_calling_frequencies_and_Preppers_Emergency_Preparedness_Recommended_Channel.2FCode_Combinations\|the FRS subpage for standardized calling channels, emergency channels]], etc.
		+
		+	Maximum power 50 watts on GMRS is except on shared narrow band channels (FRS channels 1-7) where maximum power is 5 watts. Wide band FM (25 kHz or 20K0F3E, 16K0F3E or [[Business_Radio#Emission_Designators\|similar]]) or narrow band FM (11K2F3E, 11K0F3E and several other emissions with even narrower bandwidths) allowed on the 16 GMRS only frequencies for repeater or simplex use. Low power mobile and portable radios generally use narrow FM for compatibility with other handheld FRS radios aimed at the consumer market.
		+
		+	Like the FRS service, the FCC permits use of digital transmissions on the GMRS service. Digital transmissions are limited to text messages, requests for text messages, group chat messages, in-range location "ping" transmissions to verify that a radio is still within range of another radio (automatic range transponder capability), GPS location transmissions, GPS location requests, etc.
		+

R4002 at 20:42, 11 March 2026

2026-03-11T20:42:53Z

← Older revision		Revision as of 20:42, 11 March 2026
Line 1:		Line 1:
	'''General Mobile Radio Service'''		'''General Mobile Radio Service'''

-	''22 channel voice and data service, shares frequencies with [[FRS]] service. License required. Very simple license requirement. Repeater operation allowed on 8 specific frequency pairs (repeater outputs are also used for simplex operation).''	+	''22 channel voice and data service, shares all simplex frequencies with [[FRS]] service. License required. Very simple license requirement. Repeater operation allowed on 8 specific frequency pairs (repeater outputs are also used for simplex operation).''

	''Not to be confused with the similarly named '''[[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|General Radio Service]]''' (official name for the 27 MHz [[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|CB radio]] service in Canada).''		''Not to be confused with the similarly named '''[[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|General Radio Service]]''' (official name for the 27 MHz [[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|CB radio]] service in Canada).''
		+
		+	== GMRS Frequencies GMRS Channels ==

	GMRS (and by extension, FRS) evolved out of the original 465 MHz "Class A" [[CB]] service. Calling frequency 462.675 MHz CTCSS 141.3 Hz (sometimes referred to as the "travel channel" - FRS channel 20). See page for [[FRS]] for information about combined FRS/GMRS "bubble pack" radios. As of late 2017, the FCC legalized the 8 "GMRS only" 462 MHz frequencies as part of the FRS service, changing the number of shared frequencies from 7 to 15 and legalizing the use of all 22 channels for simplex use under the FRS rules. GMRS license holders are still granted higher transmit power privileges and use of repeaters under the new rules. See also, [[FRS#FRS_calling_frequencies_and_Preppers_Emergency_Preparedness_Recommended_Channel.2FCode_Combinations\|the FRS subpage for standardized calling channels, emergency channels]], etc.		GMRS (and by extension, FRS) evolved out of the original 465 MHz "Class A" [[CB]] service. Calling frequency 462.675 MHz CTCSS 141.3 Hz (sometimes referred to as the "travel channel" - FRS channel 20). See page for [[FRS]] for information about combined FRS/GMRS "bubble pack" radios. As of late 2017, the FCC legalized the 8 "GMRS only" 462 MHz frequencies as part of the FRS service, changing the number of shared frequencies from 7 to 15 and legalizing the use of all 22 channels for simplex use under the FRS rules. GMRS license holders are still granted higher transmit power privileges and use of repeaters under the new rules. See also, [[FRS#FRS_calling_frequencies_and_Preppers_Emergency_Preparedness_Recommended_Channel.2FCode_Combinations\|the FRS subpage for standardized calling channels, emergency channels]], etc.
Line 35:		Line 37:
	*Channel 21 - 462.7000 MHz - 50 watt power limit, simplex or repeater output, shared with FRS simplex		*Channel 21 - 462.7000 MHz - 50 watt power limit, simplex or repeater output, shared with FRS simplex
	*Channel 22 - 462.7250 MHz - 50 watt power limit, simplex or repeater output, shared with FRS simplex		*Channel 22 - 462.7250 MHz - 50 watt power limit, simplex or repeater output, shared with FRS simplex
		+
		+

	Channels 1-22 are shared with the FRS service. FRS users may operate simplex only.		Channels 1-22 are shared with the FRS service. FRS users may operate simplex only.

R4002 at 13:57, 22 February 2024

2024-02-22T13:57:35Z

← Older revision		Revision as of 13:57, 22 February 2024
Line 1:		Line 1:
	'''General Mobile Radio Service'''		'''General Mobile Radio Service'''
		+
		+	''22 channel voice and data service, shares frequencies with [[FRS]] service. License required. Very simple license requirement. Repeater operation allowed on 8 specific frequency pairs (repeater outputs are also used for simplex operation).''

	''Not to be confused with the similarly named '''[[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|General Radio Service]]''' (official name for the 27 MHz [[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|CB radio]] service in Canada).''		''Not to be confused with the similarly named '''[[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|General Radio Service]]''' (official name for the 27 MHz [[CB#US_.22FCC.22_.22CEPT.22_or_.22mid_band.22_CB_Frequencies\|CB radio]] service in Canada).''