The 24XDB9 is a patch bay featuring 12 DB-9 feed-through connectors. This works great for serial data processing such as RS-422. It fits in a 2 RU space.
DB-9 Connectors
DB-9 female connectors allow attachment to serial data devices such as video tape control devices.
Rackmountable
This made to fit in a 1 Rack Unit space.