Telnet used ASCII along with CR-LF line endings, and software using other conventions would translate between the local conventions and the NVT.
tˈɛlnɪt jˈuːzd ˈæski ɐlˈɔŋ wɪð sˌiːˈɑːɹɹˌɛlˈɛf lˈaɪn ˈɛndɪŋz, ænd sˈɔftwɛɹ jˈuːzɪŋ ˈʌðɚ kənvˈɛnʃənz wʊd tɹænslˈeɪt bᵻtwˌiːn ðə lˈoʊkəl kənvˈɛnʃənz ænd ðɪ ˌɛnvˌiːtˈiː.