| Subject | English | Spanish |
| IT | voice frequency interface | interfaz en frecuencia vocal |
| IT | voice frequency interface 4-wire | interfaz de frecuencia vocal de 4 hilos |
| comp., MS | Voice User Interface | Interfaz de usuario de voz (An interface that is used to navigate the menus of a Unified Messaging (UM) system using speech inputs) |
| IT | voice/fax interface board | tablero de interfaz de voz/fax |