(29) Technology exists that enables providers of electronic communications services to limit the reception of unwanted, malicious or nuisance calls by end-users in different ways, including blocking silent calls and other unwanted, malicious and nuisance calls, such as calls originating from invalid numbers, i.e. numbers that do not exist in the numbering plan, valid numbers that are not allocated to a provider of a number-based interpersonal communications service, and valid numbers that are allocated but not assigned to an end-user. Providers of number-based interpersonal communications services should deploy this technology and protect end-users against such calls free of charge. Providers should ensure that end-users are aware of the existence of such functionalities, for instance, by publicising the fact on their webpage.
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