HF pagers

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List of known pager paging data link data systems remote control radio control in the 26-28 MHz CB or 11-meter frequency range.

See also the Remote Control FCC Part 95 Class C Page


In the United States, Part 95 of the FCC rules allow use of the six 26 MHz/27 MHz RC frequencies for high power control, supervision, data link and "attention getting" devices. Mean (average) power limit is 4 watts on 26.995 MHz, 27.045 MHz, 27.095 MHz, 27.145 MHz, 27.195 MHz and 25 watts on 27.255 MHz. The majority of high power systems use 27.255 MHz - however some do transmit 4 watts on 26.995 MHz.

26.995, 27.045, 27.095, 27.145 and 27.195 MHz are all RC exclusive frequencies and voice transmissions are not allowed. However, these frequencies are often used as a "secret channel" or "A channel" by CBers and freeband operators. 27.255 MHz is CB channel 23 and data transmissions must co-exist with voice traffic on the same frequency. This likely explains the 25 watt power limit on 27.255 compared to the 4 watt power limit on the original 5 R/C channels.

The original five RC frequencies can trace their roots back to the origins of the CB radio service - when the band was first allocated as 26.96 MHz to 27.23 MHz the FCC band plan included five model control/data channels 35 kHz from the band edges with 50 kHz spacing between each RC channel. 26.995 MHz is 35 kHz above the bottom of the band (26.960 MHz) and 50 kHz away from the next R/C channel (27.045 MHz). 27.195 MHz is 35 kHz below the original edge of the band (27.230 MHz) as well. The 50 kHz spacing was in line with the capability of remote control systems in the 1950s. 27.255 MHz was originally used for paging and kept that use even after being designated as CB channel 23.

There is also extensive Part 15 usage of these frequencies for low-power R/C model control. Higher power levels are used by professional grade systems. Most higher-end remote control/radio control devices use the 72 MHz and 75 MHz frequencies (where 0.75 watts is the maximum power output) or the unlicensed 2.4 GHz band. However, there remains considerable use of 26-27 MHz for data link, remote sensor monitoring and other similar purposes due to the high power available for unlicensed users and excellent propagation characteristics for point-to-point data networks. Some vendors are now offering systems that operate on the 5 VHF MURS frequencies for data link purposes (although these are covered under the Part 95 rules as well, they are not part of the RCRS under FCC Part 95).

There appears to be extensive use of the 26 to 28 MHz band for paging, data link networks and other non-voice purposes in Europe and Russia.

Linear Pro Access XT-1 transmitter operating on 27.255 MHz with 10 watt transmit power, can be used as part of a long-range data link, remote sensor and remote system control systems along with companion receiver(s) and even other transmitters in the same network.
View of the PCB for the XT-1 27 MHz transmitter, note the crystal for frequency control. This device transmits a 10 watt FSK signal on 27.255 MHz (USA model) or a 4 watt FSK signal on 26.995 MHz (Canada model).
Frequency Remarks
26.200 MHz UK Paging on-site pager
26.200 MHz Italy Paging on-site pager (European standard frequency, AM and FM allowed)
26.220 MHz UK Paging on-site pager (offset frequency)
26.225 MHz UK Paging on-site pager (offset frequency)
26.237 MHz UK Paging on-site, non-hospital use (offset frequency, 26.2375 MHz, 26.238 MHz)
26.250 MHz UK Paging on-site pager
26.300 MHz UK Paging on-site pager
26.350 MHz UK Paging on-site pager
26.350 MHz Italy Paging on-site pager (European standard frequency, AM and FM allowed)
26.410 MHz UK Paging on-site, non-hospital use
26.435 MHz UK Paging on-site, non-hospital use (offset frequency, 26.436 MHz)
26.437 MHz UK Paging on-site, non-hospital use (offset frequency, 26.4375 MHz, 26.438 MHz)
26.460 MHz UK Paging on-site, non-hospital use (offset frequency)
26.462 MHz UK Paging on-site, non-hospital use (offset frequency, 26.4625 MHz, 26.463 MHz)
26.500 MHz Paging, heard in Europe, noted use in Holland
26.545 MHz UK Paging on-site, non-hospital use
26.580 MHz UK Paging on-site, non-hospital use
26.590 MHz UK Paging on-site, non-hospital use (offset frequency, 26.5875 MHz, 26.588 MHz)
26.600 MHz Paging, heard in Europe, allocated in Holland (see 26.5 MHz above)
26.605 MHz Pager, unknown origin, heard on European SDRs during band openings, possible offset for 26.6 MHz
26.615 MHz UK Paging on-site, non-hospital use, heard on European SDRs during band openings
26.635 MHz Unknown origin pager, logged August 2017 sending POCSAG on UK remote SDR
26.670 MHz UK Paging on-site, non-hospital use
26.675 MHz Designated FM (ROS, PSK31, etc) data channel in Germany [German CB channel 52]
26.685 MHz Designated FM (ROS, PSK31, etc) data channel in Germany [German CB channel 53]
26.695 MHz Offset frequency for 26.700 MHz, heard in Western Europe and UK
26.700 MHz European on-site paging systems, pager transmitter center frequency (see 26.695 MHz and 26.705 MHz)
26.705 MHz Offset frequency for 26.700 MHz, heard in Western Europe and UK
26.715 MHz UK Paging on-site pager
26.725 MHz UK Paging on-site pager
26.735 MHz Pager, unknown origin, possibly Eastern Europe and/or Russia
26.745 MHz UK Paging on-site pager
26.750 MHz UK Paging on-site pager
26.755 MHz UK Paging on-site pager, monitored in Finland and elsewhere in Europe
26.785 MHz UK Paging on-site pager
26.815 MHz UK Paging on-site pager
26.815 MHz France - low power RC radio control data frequency
26.825 MHz France - low power RC radio control data frequency
26.835 MHz POCSAG pager - unknown origin pager (heard sporadically in UK, heard often in Russia)
26.835 MHz France - low power RC radio control data frequency
26.845 MHz France - low power RC radio control data frequency
26.855 MHz France - low power RC radio control data frequency
26.865 MHz UK Paging on-site pager
26.865 MHz France - low power RC radio control data frequency
26.875 MHz France - low power RC radio control data frequency
26.885 MHz France - low power RC radio control data frequency
26.890 MHz POCSAG pager logged in Europe during band openings, unknown origin
26.895 MHz France - low power RC radio control data frequency
26.900 MHz POCSAG pager - unknown origin (heard daily in UK, very strong signals)
26.905 MHz France - low power RC radio control data frequency
26.915 MHz France - low power RC radio control data frequency
26.915 MHz Designated FM (ROS, PSK31, etc) data channel in Germany [German CB channel 76]
26.925 MHz Designated FM (ROS, PSK31, etc) data channel in Germany [German CB channel 77]
26.925 MHz Data link system, heard in UK during band opening to Eastern Europe, CIS and/or Russia
26.945 MHz POCSAG pager (other modes heard) - heard daily in Russia - Russian 26 MHz paging system
26.950 MHz Local pager, heard in mainland Europe, transmits "idle" signal even when no pages are being sent
26.955 MHz Paging heard on several Russian SDRs, possible alternate to 26.945 MHz and 26.95 MHz frequencies?
26.955 MHz European standardized R/C and telemetry
26.957 MHz BEGIN ISM ISM ALLOCATION 26957-27283 kHz [center frequency 27120 +/- 163 kHz]
26.960 MHz Local pager, heard in mainland Europe, POCSAG paging 26MHz
26.960 MHz European standardized R/C and telemetry
26.965 MHz On-site local paging 5 watt ERP (Finland)
26.975 MHz UK data frequency, UK low-power R/C "Black" telemetry (100 mw limit)
26.978 MHz New Zealand channel RP1A on-site paging POCSAG
26.995 MHz Data link, paging systems and pagers, worldwide - also used for R/C purposes "Channel 3A"
26.995 MHz Radio Control RC Service Part 95 4 watt power limit in USA
26.995 MHz Linear Controls "Xtended Range Wireless" telemetry/control system, 4 watts FSK mode (Canada version)
26.995 MHz Migro Wireless Industrial wireless monitoring and control systems 27MHz - 4 watt FM FSK data link networks
26.995 MHz Australian 27 MHz R/C Channel 1
26.995 MHz UK data frequency, UK low-power R/C "Brown" telemetry (100 mw limit)
27.003 MHz New Zealand channel RP2A on-site paging POCSAG
27.007 MHz POCSAG paging signal, heard in Finland (unknown source)
27.015 MHz Noted use for low-power on site paging in Ireland
27.020 MHz New Zealand R/C Channel 102 (100mw maximum power)
27.025 MHz UK data frequency, UK low-power R/C "Brown-Red" telemetry (100 mw limit)
27.028 MHz New Zealand channel RP3A on-site paging POCSAG
27.045 MHz Data link, paging systems and pagers, worldwide - also used for R/C purposes "Channel 7A"
27.045 MHz Radio Control RC Service Part 95 4 watt power limit in USA
27.045 MHz Australian 27 MHz R/C Channel 2
27.045 MHz UK data frequency, UK low-power R/C "Red" telemetry (100 mw limit)
27.053 MHz New Zealand channel RP4A on-site paging POCSAG
27.070 MHz New Zealand R/C Channel 107 (100mw maximum power)
27.075 MHz On-site local paging 5 watt ERP (Finland)
27.075 MHz UK data frequency, UK low-power R/C "Red-Orange" telemetry (100 mw limit)
27.078 MHz New Zealand channel RP5A on-site paging POCSAG
27.090 MHz Russian pagers, heard on Russian and Eastern European SDRs
27.095 MHz Data link, paging systems and pagers, worldwide - also used for R/C purposes "Channel 11A"
27.095 MHz Radio Control RC Service Part 95 4 watt power limit in USA
27.095 MHz Australian 27 MHz R/C Channel 3
27.075 MHz UK data frequency, UK low-power R/C "Orange" telemetry (100 mw limit)
27.103 MHz New Zealand channel RP6A on-site paging POCSAG
27.120 MHz ISM center frequency 27.120 MHz +/- 163 kHz, often used for Part 15 devices (26.957 to 27.283 MHz)
27.120 MHz Part 15 Beacon frequency (second harmonic of 22 meters 13.56 MHz x2 - 27.12 MHz)
27.120 MHz New Zealand R/C Channel 112 (100mw maximum power)
27.125 MHz UK data frequency, UK low-power R/C "Orange-Yellow" telemetry (100 mw limit)
27.137 MHz New Zealand channel RP7A on-site paging POCSAG (offset frequency, 27.1375 MHz, 27.138 MHz)
27.140 MHz Russian pagers, heard on Russian and Eastern European SDRs
27.145 MHz Data link, paging systems and pagers, worldwide - also used for R/C purposes "Channel 15A"
27.145 MHz Radio Control RC Service Part 95 4 watt power limit in USA
27.145 MHz Australian 27 MHz R/C Channel 4
27.145 MHz UK data frequency, UK low-power R/C "Yellow" telemetry (100 mw limit)
27.162 MHz New Zealand channel RP8A on-site paging POCSAG (offset frequency, 27.1625 MHz, 27.163 MHz)
27.170 MHz New Zealand R/C Channel 117 (100mw maximum power)
27.175 MHz UK data frequency, UK low-power R/C "Yellow-Green" telemetry (100 mw limit)
27.187 MHz New Zealand channel RP9A on-site paging POCSAG (offset frequency, 27.1875 MHz, 27.188 MHz)
27.190 MHz Paging, possibly on-site, heard on French and German SDRs
27.195 MHz Data link, paging systems and pagers, worldwide - also used for R/C purposes "Channel 19A"
27.195 MHz Radio Control RC Service Part 95 4 watt power limit in USA
27.195 MHz Australian 27 MHz R/C Channel 6
27.195 MHz UK data frequency, UK low-power R/C "Green" telemetry (100 mw limit)
27.212 MHz New Zealand channel RP10A on-site paging POCSAG (offset frequency, 27.2125 MHz, 27.213 MHz)
27.220 MHz New Zealand R/C Channel 122 (100mw maximum power)
27.225 MHz UK data frequency, UK low-power "Green-Blue" R/C telemetry (100 mw limit)
27.230 MHz European standardized R/C and telemetry
27.235 MHz Digital modes (ROS, PSK31, etc) and paging found here - Europe
27.237 MHz New Zealand channel RP11A on-site paging POCSAG (offset frequency, 27.2375 MHz, 27.238 MHz)
27.240 MHz European standardized R/C and telemetry
27.245 MHz Digital modes (ROS, PSK31, etc) and paging found here - Europe
27.245 MHz UK data frequency, UK low-power R/C "Blue" telemetry (100 mw limit)
27.250 MHz Noted use in Eastern Europe/Russia for POCSAG
27.255 MHz Data link, paging systems and pagers, worldwide - also used for R/C purposes - CB Channel 23
27.255 MHz Paging USA, 25 watt power allowed in US for paging, telemetry, data link and R/C
27.255 MHz Radio Control RC Service Part 95 25 watt power limit in USA
27.255 MHz Linear Controls "Xtended Range Wireless" telemetry/control system, 10 watts FSK mode
27.255 MHz On-site local paging 5 watt ERP (Finland)
27.255 MHz Multiple-site FSK 27 MHz data link system noted near Poughquag, NY USA, 7.5-8 kHz bandwidth FSK bursts
27.255 MHz Multiple-site FSK 27 MHz data link system noted near Highland Falls, NY USA, nearly constant FSK data bursts
27.255 MHz RadioShack 7-watt FSK paging system on-site paging system frequency (legal under Part 95 of FCC rules)
27.255 MHz WAVE Lightning Detection/Alert Remote Sirens - 10 watt data network connecting remote sites using FSK on 27.255 MHz
27.255 MHz POCSAG Paging System - unknown location last heard during 11 meter band opening in 2016
27.262 MHz New Zealand channel RP12A on-site paging POCSAG (offset frequency, 27.2625 MHz, 27.263 MHz)
27.270 MHz Local pager, heard in mainland Europe, similar to systems operating on 27.300 MHz and 27.350 MHz
27.275 MHz UK data frequency, UK low-power R/C "White" or "Purple" telemetry (100 mw limit)
27.280 MHz New Zealand R/C Channel 128 (100mw maximum power)
27.283 MHz END ISM ALLOCATION 26957-27283 kHz [center frequency 27120 +/- 163 kHz]
27.300 MHz POCSAG Paging (heard daily in UK)
27.350 MHz POCSAG Paging (heard sporadically in UK - unknown origin)
27.360 MHz POCSAG Paging (heard sporadically in UK - unknown origin)
27.400 MHz On-site local paging 5 watt ERP (Finland)
27.400 MHz Republic of Korea / South Korea on-site paging frequency allocation
27.410 MHz Republic of Korea / South Korea on-site paging frequency allocation
27.410 MHz European standardized R/C and telemetry
27.412 MHz Republic of Korea / South Korea on-site paging frequency allocation (offset frequency 27.4125 MHz)
27.415 MHz European standardized R/C and telemetry
27.422 MHz Republic of Korea / South Korea on-site paging frequency allocation (offset frequency 27.4225 MHz)
27.440 MHz Republic of Korea / South Korea on-site paging frequency allocation
27.450 MHz Paging, heard in several parts of Europe
27.510 MHz Paging, German allocation pager 27 MHz
27.545 MHz R/C, data link and telemetry low power "RC channel 31"
27.550 MHz Paging, POCSAG, heard on European SDRs, unknown origin
27.600 MHz POCSAG Paging (heard daily in Netherlands)
27.615 MHz R/C, data link and telemetry low power "RC channel 32"
27.615 MHz R/C, data link and telemetry low power "RC channel 32"
27.635 MHz R/C, data link and telemetry low power "RC channel 33"
27.635 MHz Digital modes (ROS, PSK31, etc) and paging found here - Europe
27.650 MHz POCSAG Paging (heard daily in Netherlands)
27.650 MHz Data link (US East Coast based), possibly US military
27.675 MHz R/C, data link and telemetry low power "RC channel 34"
27.700 MHz POCSAG Paging (heard daily in Netherlands)
27.725 MHz R/C, data link and telemetry low power "RC channel 35"
27.750 MHz POCSAG Paging (heard daily in Netherlands)
27.775 MHz R/C, data link and telemetry low power "RC channel 36"

Keywords:

26 MHz pager 27MHz paging 27.255 MHz data link 27 MHz data transmitter 27007 kHz 27255 kHz FCC Part 15 Part 95 POCSAG 26.995MHz 27.045MHz 27.095MHz 27.145MHz 27.195MHz 27.225MHz 27.235MHz 27.245MHz 27.255MHz 27.270MHz 27.12 MHz ISM 27MHz band paging Long Range Systems 467.750 MHz RCRS Remote Control Radio Service 25 watt 27.255 data 27MHz data link 100mw low power data link IOT low frequency 900 MHz 151.820 MHz 151.880 MHz 151.940 MHz 154.570 MHz 154.600 MHz MURS data datalink 154MHz 151MHz license free long range 10 watt FSK signal Linear Systems WAVE lightning detector remote monitoring link 27MHz CB radio frequency list HFUnderground

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