The DB9 A/B switch latching card allows you to switch between two DB9 connections
If power is lost the connection will retain its connected state
Controller Cards take up only one slot, and external power connects to the controller card, One slot is reserved for future use, leaving you with 16 slots for A/B Switch Cards
All switch cards take up one slot except for the power A/B cards which take up two slots
Manage access to networks, implement backup systems for network and computer connections, or share peripherals and other equipment