EWA Assistance for Interference Complaints
The Enterprise Wireless Alliance (EWA) has
executed Memorandum of Understanding with the Federal Communications
Commission (FCC) whereby EWA assists licensees to identify and
resolve instances of radio frequency interference in the spectrum
bands allocated for use by business, industrial and land
transportation entities. EWA works in conjunction with the FCC’s
Compliance and Information Bureau (CIB) to protect the operational,
technical and regulatory integrity of the private enterprise
wireless communications environment.
There are many forms of interference and the
information contained on these pages is designed to provide:
Assistance in identifying specific forms of radio frequency
Recommended solutions to various forms of interference; and
Suggest methods to resolve instances of interference.
Please note that EWA cannot address
interference matters involving broadcast spectrum, marine radio
spectrum, cell phone service, or interference to home electronics.
Complaints of that nature should be directed to the FCC at
1-888-225-5322 (1-888-CALL FCC).
There are many causes of interference to radio
frequency communication systems.
Some forms are essentially minor in nature, often termed
nuisance interference, while other cases are more serious and are
called “harmful” interference.
The following provides a brief overview of what constitutes
nuisance and harmful interference.
The majority of voice and data communication
systems that are purchased and operate on channels allocated for use
by business, industrial and land transportation licenses are shared
among a number of users and, as such radio communications compete
for airtime. In this
shared frequency environment, it is not uncommon to hear other
communications that are not intended for your employees, management
or dispatcher. This is
not considered “harmful interference” under the FCC rules. It is
EWA’s experience that many interference problems are caused by
licensees unwittingly operating beyond the scope of their license
authorization. In these cases, resolution of the interference
problem may be achieved simply by notifying the offending licensee
of its obligations under FCC rules and regulations. By educating
licensees unfamiliar with sharing requirements (i.e., monitoring,
use of call signs, etc.) all parties may arrive at an equitable
resolution to the interference without the need for EWA or
If you are able to identify the source of the
other signal you are hearing (usually by means of over the air
monitoring), you should contact them directly to discuss the matter
and work to establish a cooperative channel sharing arrangement.
Contact information for all licensees can be found using the FCC’s
Universal Licensing System (ULS) (http://wireless.fcc.gov/uls/).
The ULS allows you to search the FCC’s license database using
either a call sign or licensee name.
If you are not able to identify the other user
via monitoring you can still search the ULS to view all of your
co-channel licensees who are legally operating in your geographic
area using the FCC’s General Menu Reports (GenMen) (http://svartifoss2.fcc.gov/reports/index.cfm).
GenMen presents a variety of search options using frequency,
geographic coordinates, radio service, state, etc.
Harmful Unlicensed Operations
If you are able to conclusively determine that
the source of the interfering signal is an unlicensed operator, EWA
will be pleased to refer your complaint to the FCC. Since EWA has no
enforcement authority, clear violations of the FCC’s licensing
requirement can only be resolved by the FCC. In order to provide the
FCC with complete information about the problem you are experiencing
we request that you complete a Compliance
Request Report (link) and return it to EWA (e-mail: TBD;
or fax: (703) 524-1074).
Some interference problems are technical in nature and require a
corresponding technical solution. There are a number of ways in
which technical interference can manifest itself. Please review Types
of Interference (link) and Manifestations
of Interference, Causes of Interference, and Solutions to
Interference (link) for more details. These kinds of problems
generally require some level of technical sophistication to diagnose
and correct so your first recommended action is to contact your
radio sales/technical representative. If you do not use the services
of a radio dealer/service organization, EWA can identify several for
you in your immediate geographic area. In order to take advantage of
this service, we request that you complete a Compliance Request
Report (link) and return it EWA (e-mail
Cell: (301) 785-6716
Call your local
radio dealer, USMSS, or RF Consultant for your
interference resolution needs.