From Computer History Wiki
Also known as the M7819.
This was an 8 port serial card (Asynchronous Mux) for VAX 11/780's, and other Digital computers.
Common accessories for the M7819 are:
- H317 Cable Box assembly
- DZ11 EIA distribution panel
- BC05W 50 conductor signal cable
- H325 test connector
- H3271 test connector.