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FCC Station Class Codes

From The RadioReference Wiki

Station class codes describe the purpose for which a particular station is used.

Most common Public Safety and Business Station Class Codes

FB - Base Station

A station at a specified site authorized to communicate with mobile stations.

MO - Mobile Station

A station in the mobile service intended to be used while in motion or during halts at unspecified points. This includes hand carried transmitters and, with certain limitations, may also include boats and aircraft.

FB2 - Mobile Relay

A repeater. This may be conventional, decentralized trunking, or centralized trunking depending on frequency band and rules under which it is deployed. It may also be a very simple or very elaborate system.

FX1 - Control Station

A base station that operates through a repeater in the same way as a mobile station. It is intended to speak with mobile and portable radios only through the repeater and not directly. FX1 stations licensed under the 6.1 Meter Rule may be placed at various locations throughout the system's area of operation and are typically listed only by the state of operation, but the protected service area is that of the system, not statewide.

FXO - Operational Fixed Station

A transceiver which may operate as a link between two or more fixed locations. The designator is often used in radio link or SCADA telemetry systems. With the exception of certain frequencies, operational fixed stations are typically secondary to land mobile communications.

FB4 - Community Repeater

A conventional repeater which is usually stand-alone (no connection to other sites or repeaters) and operates multiple CTCSS or CDCSS tones, or possibly a single-frequency LTR repeater which accommodates multiple subscribers. These subscribers need to be licensed individually to use their respective tone, code, or LTR talkgroup.

FB6 - Private Carrier (profit)

A repeater operated by a radio communications provider for multiple subscribers who are covered under the carrier's license.

FB7 - Private Carrier (non-profit)

A repeater operated by a not-for-profit entity for multiple subscribers who are covered under the entity's license.

FB8 - Centralized Trunk Relay

A repeater operating within a centralized trunked radio system which has exclusive use of the designated frequency within a given geographic area. The designation is used between 150 - 512 MHz and may indicate a variety of technologies including analog, P25, 2-slot DMR (MOTOTRBO), NXDN, or other centralized trunking scheme. The use of FB8 on T-Band is seen, but is redundant, as T-Band systems which meet channel loading criteria already have geographic exclusivity. A T-Band trunked system should rather use FB2 instead, with trunking operation indicated as a YW in the Radio Service field.

An FB8 station must pass rigorous criteria typically governed by 47 C.F.R. 90.187 during coordination. These include (for VHF), the proposed system's 19 dBu F(50,10) "interference contour" not intersecting an incumbent user's 37 dBu F(50,50) "service contour;" the interference contour of all incumbents not intersecting the proposed system's service contour (called "reverse engineering"); and derated interference contours (bandwidth dependent) not interfering with adjacent channel incumbent licensees and earlier requests for frequency coordination. Mobiles within the system had classically been required to be brought out to the edge of their area of operation, with interference contours drawn in the closest vector toward incumbent operations. Additionally, some regions require international coordination. The FCC requires the consent of all affected parties be documented in writing before granting FB8 exclusivity. Therefore, converting an FB2 that already exists to an FB8 should never be assumed, nor should there be assumption that there is adequate spectrum to construct in congested bands without significant effort - particularly considering combiner/multicoupler frequency isolation requirements.

MO8 - Trunked Subscriber Unit

A mobile or hand-held transceiver operating in a centralized trunked radio system within an exclusive geographic area. This designation is used between 150 - 512 MHz to indicate that the frequency corresponds to an exclusive trunked system. Public safety and business industrial coordinators may use slightly different methodologies in coordinating these systems.

Interconnect

A connection to the telephone network to allow radio users to make or receive telephone calls. Also called a phone patch. Some implementations construe this appendage to include wireline control of the system, but the original intent was for connection to the public switched telephone network (PSTN). These stations are usually indicated by a "C" appended to the station class code for Connected.

Itinerant

A station that is operated temporarily at different locations. These stations are usually indicated by an "I" appended to the station class code for Itinerant.

Temporary

A station that is not permanently located and may be moved about within a declared geographic area. As the locations are uncertain, these stations are not protected from co-channel or adjacent channel interference. These stations are usually indicated by a "T" appended to the station class code for Temporary.

Stand-by

A station that is not in primary operation, but is there "just in case." These stations are not protected from co-channel or adjacent channel interference. These stations are usually indicated by an "S" appended to the station class code for Stand-by.

Full List of FCC Station Class Codes

FCC Station Class Codes
Code Description
AOX Operational Fixed
APC ALASKA PUBLIC
APX ALASKA PRIVATE
APX2 ALASKA PRIVATE (TEMPORARY)
AX AERONAUTICAL FIXED
AX1 AERONAUTICAL FIXED (MOBILE)
AX2 AERONAUTICAL FIXED (TEMPORARY)
DGP DIFFERENTIAL GPS
ELT ELT TEST
ELT1 ELT TEST (MOBILE)
FA AERONAUTICAL ENROUTE
FA1 AERONAUTICAL ENROUTE (MOBILE)
FA2 AERONAUTICAL ENROUTE (TEMPORARY)
FAA AERONAUTICAL ADVISORY (UNICOM)
FAA1 AERONAUTICAL ADVISORY (UNICOM) (MOBILE)
FAA2 AERONAUTICAL ADVISORY (UNICOM) (TEMPORARY)
FAB AUTOMATIC WEATHER OBSERVATION
FAC AIRPORT CONTROL TOWER
FAS AVIATION SUPPORT INSTRUCTIONAL
FAS1 AVIATION SUPPORT INSTRUCTIONAL (MOBILE)
FAT FLIGHT TEST
FAT1 FLIGHT TEST (MOBILE)
FAT3 FLIGHT TEST (ITINERANT)
FB Base
FB2 Mobile Relay
FB2A Mobile Relay - Airport Terminal Use
FB2C Mobile Relay - Interconnect
FB2I Mobile Relay - Itinerant
FB2J Mobile Relay - Temporary Interconnect
FB2K Mobile Relay - Stand-by Interconnect
FB2L Mobile Relay - Itinerant Interconnect
FB2S Mobile Relay - Stand-by
FB2T Mobile Relay - Temporary
FB4 Community Repeater
FB4A Community Repeater - Airport Terminal Use
FB4C Community Repeater - Interconnect
FB4I Community Repeater - Itinerant
FB4J Community Repeater - Temporary Interconnect
FB4K Community Repeater - Stand-by Interconnect
FB4L Community Repeater - Itinerant Interconnect
FB4S Community Repeater - Stand-by
FB4T Community Repeater - Temporary
FB6 Private Carrier (profit)
FB6A Private Carrier (profit) - Airport Terminal Use
FB6C Private Carrier (profit) - Interconnect
FB6I Private Carrier (profit) - Itinerant
FB6J Private Carrier (profit) - Temporary Interconn
FB6K Private Carrier (profit) - Stand-by Interconne
FB6L Private Carrier (profit) - Itinerant Interconn
FB6S Private Carrier (profit) - Stand-by
FB6T Private Carrier (profit) - Temporary
FB7 Private Carrier (non-profit)
FB7A Private Carrier (non-profit) - Airport Terminal Use
FB7C Private Carrier (non-profit) - Interconnect
FB7I Private Carrier (non-profit) - Itinerant
FB7J Private Carrier (non-profit) - Temporary Inter
FB7K Private Carrier (non-profit) - Stand-by Interc
FB7L Private Carrier (non-profit) - Itinerant Inter
FB7S Private Carrier (non-profit) - Stand-by
FB7T Private Carrier (non-profit) - Temporary
FB8 Centralized Trunk Relay
FB8A Centralized Trunk Relay - Airport Terminal Use
FB8C Centralized Trunk Relay - Interconnect
FB8I Centralized Trunk Relay - Itinerant
FB8J Centralized Trunk Relay - Temporary Interconnect
FB8K Centralized Trunk Relay - Standby Interconnect
FB8L Centralized Trunk Relay - Itinerant Interconnect
FB8S Centralized Trunk Relay - Standby
FB8T Centralized Trunk Relay - Temporary
FBA Base - Airport Terminal Use
FBAT Small Base - Temporary
FBBS Base
FBC Base - Interconnect
FBCT FBCT
FBGS Ground
FBI Base - Itinerant
FBJ Base - Temporary Interconnect
FBK Base - Stand-by Interconnect
FBL Base - Itinerant Interconnect
FBS Base - Stand-by
FBSI Air-ground Signaling
FBST Standby
FBT Base - Temporary
FC PUBLIC COAST
FC2 PUBLIC COAST(TEMPORARY)
FCA MARINE SUPPORT-TESTING & TRAINING
FCA2 MARINE SUPPORT-TESTING & TRAINING (TEMPORARY)
FCL PRIVATE COAST
FCL2 PRIVATE COAST (TEMPORARY)
FCU MARINE UTILITY
FCU1 MARINE UTILITY (MOBILE)
FIS Flight Information Services
FIS1 Flight Information Services with Hand Held/Mobile
FIS2 Flight Information Services for Temporary Operatio
FLT Auxiliary Test
FLTC Auxiliary Test - Interconnect
FLTI Auxiliary Test - Itinerant
FLTL Auxiliary Test - Itinerant Interconnect
FLU AVIATION SUPPORT SERVICE
FLU1 AVIATION SUPPORT SERVICE (MOBILE)
FMA1 AIRCRAFT FLIGHT TEST STATION
FX Fixed
FX1 Control
FX1A Control - Airport Terminal Use
FX1C Control - Interconnect
FX1I Control - Itinerant
FX1J Control - Temporary Interconnect
FX1K Control - Stand-by Interconnect
FX1L Control - Itinerant Interconnect
FX1S Control - Stand-by
FX1T Control - Temporary
FX2 Fixed Relay
FX2A Fixed Relay - Airport Terminal Use
FX2C Fixed Relay - Interconnect
FX2I Fixed Relay - Itinerant
FX2J Fixed Relay - Temporary Interconnect
FX2K Fixed Relay - Stand-by Interconnect
FX2L Fixed Relay - Itinerant Interconnect
FX2S Fixed Relay - Stand-by
FX2T Fixed Relay - Temporary
FX3 Secondary Fixed (Tone Signalling)
FX3A Secondary Fixed - Airport Terminal Use
FX3C Secondary Fixed - Interconnect
FX3I Secondary Fixed - Itinerant
FX3J Secondary Fixed - Temporary Interconnect
FX3K Secondary Fixed - Stand-by Interconnect
FX3L Secondary Fixed - Itinerant Interconnect
FX3S Secondary Fixed - Stand-by
FX3T Secondary Fixed - Temporary
FX5 Temporary Fixed
FXA Fixed - Airport Terminal Use
FXB Primary Permanent Fixed Stations or Links
FXC Fixed - Interconnect
FXCO Central Office
FXCT Control
FXDI Dispatch
FXI Fixed - Itinerant
FXIO Inter-office
FXJ Fixed - Temporary Interconnect
FXK Fixed - Stand-by Interconnect
FXL Fixed - Itinerant Interconnect
FXO Operational Fixed
FXOA Fixed - Interconnect - Airport Terminal Use
FXOC Operational Fixed - Interconnect
FXOI Operational Fixed - Itinerant
FXOJ Operational Fixed - Temporary Interconnect
FXOK Operational Fixed - Stand-by Interconnect
FXOL Operational Fixed - Itinerant Interconnect
FXOS Operational Fixed - Stand-by
FXOT Operational Fixed - Temporary
FXRP Repeater
FXRX Fixed Relay
FXS Fixed - Stand-by
FXSB Fixed Subscriber
FXT Fixed - Temporary
FXTS Auxiliary Test
FXV CTS Exceeding 20'
FXW CTS Meeting 20'
FXY Interzone
FXYC Interzone - Interconnect
FXZ Zone
FXZC Zone - Interconnect
GCO GROUND COMMUNICATIONS OUTLET
LR Radiolocation Land
LRC Radiolocation Land - Interconnect
LRJ Radiolocation Land - Temporary Interconnect
LRK Radiolocation Land - Stand-by Interconnect
LRS Radiolocation Land - Stand-by
LRT Radiolocation Land - Temporary
MFL AERONAUTICAL MULTICOM
MFL1 AERONAUTICAL MULTICOM (MOBILE)
MFL2 AERONAUTICAL MULTICOM (TEMPORARY)
MFX MARINE OPS FIXED
MFX2 MARINE OPS FIXED (TEMPORARY)
MLSB Mobile Subscriber
MO Mobile
MO3 Vehicular Repeater
MO3A Vehicular Repeater - Airport Terminal Use
MO3C Vehicular Repeater with Interconnect
MO3I Vehicular Repeater - Itinerant
MO3J Vehicular Repeater with Temporary Interconnect
MO3K Vehicular Repeater with Stand-by Interconnect
MO3L Vehicular Repeater with Itinerant Interconnect
MO3S Stand-by Vehicular Repeater
MO3T Temporary Vehicular Repeater
MO5 Mobile & Temporary Fixed
MO6 Private Carrier Mobile Operation (profit)
MO6A Private Carrier Mobile Operation (profit) - Airport Terminal Use
MO6C Private Carrier Mobile Operation (profit) - Interconnect
MO6I Private Carrier Mobile Operation (profit) - Itinerant
MO6J Private Carrier Mobile Operation (profit) with Temporary Interconnect
MO6K Private Carrier Mobile Operation (profit) with Stand-by Interconnect
MO6L Private Carrier Mobile Operation (profit) with Itinerant Interconnect
MO6S Private Carrier Mobile Operation (profit) - Stand-by
MO6T Temporary Private Carrier Mobile Operation (profit)
MO7 Private Carrier Mobile Operation (non-profit)
MO7A Private Carrier Mobile Operation (non-profit) - Airport Terminal Use
MO7C Private Carrier Mobile Operation (non-profit) - Interconnect
MO7I Private Carrier Mobile Operation (non-profit) - Itinerant
MO7J Private Carrier Mobile Operation (non-profit) with Temporary Interconnect
MO7K Private Carrier Mobile Operation (non-profit) with Stand-by Interconnect
MO7L Private Carrier Mobile Operation (non-profit) with Itinerant Interconnect
MO7S Private Carrier Mobile Operation (non-profit) - Stand-by
MO7T Temporary Private Carrier Mobile Operation (non-profit)
MO8 Centralized Trunk Mobile
MO8A Centralized Trunk Mobile - Airport Terminal Use
MO8C Centralized Trunk Mobile - Interconnect
MOA Mobile - Airport Terminal Use
MOC Mobile - Interconnect
MOI Mobile - Itinerant
MOJ Mobile with Temporary Interconnect
MOK Mobile with Stand-by Interconnect
MOL Mobile with Itinerant Interconnect
MOS Mobile - Stand-by
MOT Mobile - Temporary
MOU1 AERONAUTICAL UTILITY MOBILE
MR Radiolocation Mobile
MRT MARINE RECEIVER TEST
MRT2 MARINE RECEIVER TEST (TEMPORARY)
MSC SHORE RADAR TEST
MSC2 SHORE RADAR TEST (TEMPORARY)
MSR SHORE RADIONAVIGATION
MSR2 SHORE RADIONAVIGATION (TEMPORARY)
RCO REMOTE COMMUNICATIONS OUTLET
RLA AERONAUTICAL MARKER BEACON
RLA1 AERONAUTICAL MARKER BEACON (MOBILE)
RLA2 AERONAUTICAL MARKER BEACON (TEMPORARY)
RLB AERONAUTICAL RADIO BEACON
RLB1 AERONAUTICAL RADIO BEACON (MOBILE)
RLB2 AERONAUTICAL RADIO BEACON (TEMPORARY)
RLC SHORE RADIOLOCATION TEST
RLC2 SHORE RADIOLOCATION TEST (TEMPORARY)
RLD RADAR/RADAR TEST
RLD1 RADAR/RADAR TEST (MOBILE)
RLD2 RADAR/RADAR TEST (TEMPORARY)
RLG GLIDE PATH (SLOPE)
RLG1 GLIDE PATH (SLOPE) (MOBILE)
RLG2 GLIDE PATH (SLOPE) (TEMPORARY)
RLL LOCALIZER
RLL1 LOCALIZER (MOBILE)
RLL2 LOCALIZER (TEMPORARY)
RLO OMNIDIRECTIONAL RADIO RANGE
RLO1 OMNIDIRECTIONAL RADIO RANGE (MOBILE)
RLO2 OMNIDIRECTIONAL RADIO RANGE (TEMPORARY)
RLR SHORE RADIOLOCATION/RACON
RLR2 SHORE RADIOLOCATION/RACON (TEMPORARY)
RLT RADIONAVIGATION LAND TEST
RLT1 RADIONAVIGATION LAND TEST (MOBILE)
RLT2 Radionavigation Land Test - Temporary
RNV RADIONAVIGATION LAND
RNV1 RADIONAVIGATION LAND (MOBILE)
RNV2 RADIONAVIGATION LAND (TEMPORARY)
RPC RAMP CONTROL
SAR SEARCH AND RESCUE
SAR1 SEARCH AND RESCUE (MOBILE)
UAT Universal Access Transceiver service - Fixed
UAT1 Universal Access Transceiver service - Mobile
UAT2 Universal Access Transceiver service - Temporary Fixed
WDX Radiolocation Weather Radar
WDXS Radiolocation Weather Radar - Standby
WDXT Radiolocation Weather Radar - Temporary


*FXO or FXB on 4.9 GHz?

4.9 GHz systems installed at permanent locations must be licensed to the particular sites they will be used at. In FCC 09-29, the Commission afforded priority to 4.9 GHz systems carrying broadband data versus those that did not. To differentiate primary or secondary status, in DA 09-2530, the Commission retasked the station class code FXB to indicate "broadband" and primary status. The legacy code, FXO now indicates secondary status for 4.9 GHz links only. This primary/secondary status for broadband does not apply to any other frequency band or use. Broadband can practically be carrying VoIP E9-1-1 and Computer Aided Dispatch traffic to and from remote PSAPs, or can be supplying transport to and from future generation LTE eNode-B stations. Discrete voice radio traffic itself does not fit the Commission's "broadband" qualifier, but radio traffic digitized and multiplexed into other data can.

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