Telecommunications: rights and network operations · France / Switzerland
Radio interference: prepare an evidence-based report
A useful interference report identifies the wanted radio service and describes a repeatable disturbance in its actual operating context. Record frequency, place, time, equipment and recent changes, then attach available measurements. France and Switzerland have their own reporting authorities and investigation routes. Separate observations from suspected causes; a connection failure alone does not identify an interfering transmitter or establish responsibility.
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- Jurisdiction
- Service and frequency
- Location and periods
- Configuration and checks
- Measurements and report
- Official texts cited
- Sources checked on
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Where and when does the disturbance occur?
France: preserve dated places, times, duration and repeatability conditions. Switzerland: retain the corresponding observation log with its author, distinguishing contemporary measurements from later recollection instead of treating every account as the same evidence.
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Which wanted service and frequency are affected?
France: identify the wanted service, known frequency and observed disturbance before reporting to the relevant ANFR route. Switzerland: identify the same concrete radio service; service loss alone does not establish interference or its source.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Radio-observation and measurement chronology
Synthetic example: fictional records. Radio-observation and measurement chronology.
Synthetic example: fictional records · Radio-observation and measurement chronology
- Jurisdiction
- France
- Service and frequency
- Service S1, frequency F1 to identify
- Location and periods
- Site L1, time windows H1
- Configuration and checks
- Equipment E1, checks T1
- Measurements and report
- Logs M1, submission D1
Separate observations from suspected causes; a connection failure alone does not identify an interfering transmitter or establish responsibility.
Where and when does the disturbance occur?
France: preserve dated places, times, duration and repeatability conditions. Switzerland: retain the corresponding observation log with its author, distinguishing contemporary measurements from later recollection instead of treating every account as the same evidence.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Preparation reference: Radio-observation and measurement chronology
| Preparation question | Point to verify |
|---|---|
| Which wanted service and frequency are affected? | France: identify the wanted service, known frequency and observed disturbance before reporting to the relevant ANFR route. Switzerland: identify the same concrete radio service; service loss alone does not establish interference or its source. |
| Where and when does the disturbance occur? | France: preserve dated places, times, duration and repeatability conditions. Switzerland: retain the corresponding observation log with its author, distinguishing contemporary measurements from later recollection instead of treating every account as the same evidence. |
| What equipment configuration was operating at the time? | France: describe receiver, antenna, connections and settings during the event. Switzerland: preserve the actual configuration and changes as well; measurements from different setups should not silently be treated as directly comparable observations. |
| What distinguishes a repeatable radio disturbance from a connection fault? | France: distinguish a connection fault, equipment fault and alleged radio disturbance using checks actually performed. Switzerland: keep those alternatives visible; an internet interruption is not automatically evidence identifying a harmful radio transmitter. |
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
What equipment configuration was operating at the time?
France: describe receiver, antenna, connections and settings during the event. Switzerland: preserve the actual configuration and changes as well; measurements from different setups should not silently be treated as directly comparable observations.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
What distinguishes a repeatable radio disturbance from a connection fault?
France: distinguish a connection fault, equipment fault and alleged radio disturbance using checks actually performed. Switzerland: keep those alternatives visible; an internet interruption is not automatically evidence identifying a harmful radio transmitter.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Which official provision helps explain this situation?
A useful interference report identifies the wanted radio service and describes a repeatable disturbance in its actual operating context. Record frequency, place, time, equipment and recent changes, then attach available measurements. France and Switzerland have their own reporting authorities and investigation routes. Separate observations from suspected causes; a connection failure alone does not identify an interfering transmitter or establish responsibility.
Which measurements and technical checks are available?
France: retain measurement, instrument, method, place and date, including limitations. Switzerland: supply the same available technical evidence for investigation; a standalone graph does not prove the responsible emitter or replace the competent examination.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
What known transmitters or recent changes are relevant observations?
France: identify known transmitters or recent changes with their actual evidence. Switzerland: preserve those observations separately from hypotheses; proximity to an antenna alone does not establish that it caused the disturbance.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Which national authority should receive the report and attachments?
France: L43 identifies ANFR’s disturbance-investigation role. Switzerland: LTC 34 gives OFCOM investigation and intervention powers in its scope, including concerning a compliant installation; reporting facts does not itself establish noncompliance or require automatic shutdown.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
What investigation is still needed before identifying a responsible transmitter?
France: identifying responsibility still requires linking the disturbance and source while examining alternatives. Switzerland: preserve that same investigative distinction. This record supports a factual report and is not a finding of fault or an order against another operator.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Which preparation steps come first?
Editorial preparation order, not a popularity or success-probability ranking. Prioritise repeatable observations, then measurements and hypotheses kept distinct from established facts.
Identify the wanted service
Service and frequency define the investigation before a source is suspected.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Record place, time and repeatability
A reproducible observation can be compared with other evidence; recollection remains identified separately.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Preserve the operating configuration
Different receivers, antennas or settings can make two observations incomparable.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Attach measurements with their method
Instrument, date and location make a reading interpretable rather than a disconnected graph.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Keep hypotheses separate from the report
The authority receives attributed facts and evidence, without a presumed responsible transmitter.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
Which official references should you consult?
- Code des postes et des communications électroniques : L43-I-perturbationwww.legifrance.gouv.fr
- Loi sur les télécommunications : 34www.fedlex.admin.ch
Texts cited last checked: 3 November 2026
What other questions arise in this file?
Where and when does the disturbance occur?
France: preserve dated places, times, duration and repeatability conditions. Switzerland: retain the corresponding observation log with its author, distinguishing contemporary measurements from later recollection instead of treating every account as the same evidence.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
What distinguishes a repeatable radio disturbance from a connection fault?
France: distinguish a connection fault, equipment fault and alleged radio disturbance using checks actually performed. Switzerland: keep those alternatives visible; an internet interruption is not automatically evidence identifying a harmful radio transmitter.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
What known transmitters or recent changes are relevant observations?
France: identify known transmitters or recent changes with their actual evidence. Switzerland: preserve those observations separately from hypotheses; proximity to an antenna alone does not establish that it caused the disturbance.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34
What investigation is still needed before identifying a responsible transmitter?
France: identifying responsibility still requires linking the disturbance and source while examining alternatives. Switzerland: preserve that same investigative distinction. This record supports a factual report and is not a finding of fault or an order against another operator.
Code des postes et des communications électroniques : L43-I-perturbationLoi sur les télécommunications : 34