Switzerland and the Principality of Liechtenstein
Radio Interface Regulation

784.101.21 / RIR10091)
Radio microphones and ALD

RIR1009-12
ALD
173.965 - 223 MHz
10 mW e.r.p.
Edition 4.0 / 01.01.2024

Nr Parameter2)DescriptionComments
1Radiocommunication service--
2ApplicationALDAssistive Listening Devices (ALD). Also referred to as aids for the hearing impaired.
3Frequency band173.965 - 223 MHzAssistive Listening Devices may suffer from interference in Switzerland and in the Principality of Liechtenstein. They have to accept interference from broadcasting services (174 – 223 MHz) and PMR (173.965 – 174 MHz).
4Channelling--
5Modulation / Occupied bandwidth--
6Direction / Separation--
7Transmit power / Power densityMax. 10 mW e.r.p.-
8Channel access and occupation rules--
9Authorisation regimeSwitzerland: License exempt.
Liechtenstein: General authorisation.		Operation on NIB / NPB. (Non interference basis / non protection basis).
10Additional essential requirements--
11Frequency planning assumptionsEN 300 422-4-
12Planned changes--
13ReferenceEN 300 422-4 /-/ ERC/REC 70-03, Annex 10.Effective use of spectrum / ECC Decisions / ECC Recommendations.
14Notification numberG/TBT/N/CHE/280
2023/9009/CH		-
15RemarksEN 301 489-9-

Normative part: 1 to 11
Informative part: Nr 12 to 15

1) RIR for similar and/or other applications are available under: https://www.bakom.admin.ch/bakom/en/home/frequenzen-antennen/nationaler-frequenzzuweisungsplan/schnittstellen-anforderungen.html
2) For explanations and legal status, please refer to basis document 784.101.21 / RIR0000