Большой англо-русский и русско-английский словарь
telecommunicati(ons) system, telephone system, telephone communications system, voice system
Англо-русский словарь технических терминов
voice system, telecommunications system, telecom system, telephone communications system, telephone system
Русско-английский политехнический словарь
voice system, telecommunications system, telecom system, telephone communications system, telephone system
Dictionnaire technique russo-italien
sistema telefonico