| Subject | English | Spanish |
| comp., MS | shared line appearance | apariencia de línea compartida (A telephony feature that makes two or more phones behave as if they are linked; that is, that a call to one number causes all phones to ring) |
| commun. | shared-service line | línea compartida en dos sentidos |
| tel. | shared-service line | línea compartida entre dos abonados |
| el. | specialised line "transmission mixed/shared reception" | enlace especializado "emisión mixta/compartida/recepción" |
| el. | specialized line "transmission mixed/shared reception" | enlace especializado "emisión mixta/compartida/recepción" |