The article is devoted to the question of dieremes (signals of juncture) in the phonetics of the modern Russian language. The behavior of phonemes in strong deafness-sonority positions located at the junctions of a full-meaning word with enclitic and proclitic is analyzed. The research was conducted using examples recorded from speech that can be called colloquial (interviews, videos from personal blogs). It is noticed that in enclitism, dieremes appear – phonemes are realized with a deaf sound, although they are in strong positions. In proclitism, as a rule, dieremes do not appear – phonemes are realized by voiced consonants. The results of the study allowed us to conclude that both phenomena are explained by phonetic laws: before enclitics, a diereme is necessary to indicate that a full-meaning word has ended (stun at the end of the word); proclitics are semantical and as non-independent words, do not need stun – the phoneme in a strong position is realized by a voiced consonant.