| Subject | English | French |
| IT, el. | null modem | modem nul |
| IT | Null Modem | éliminateur de modem |
| comp., MS | null modem | câble null modem (Special cabling that eliminates the modem's need for asynchronous communications between two computers over short distances. A null modem cable emulates modem communication) |
| IT | null modem cable | câble d'éliminateur de modem |
| avia., Canada, tech. | null modem cable | câble simulateur de modem |