Black Box ACX1MR-AR KVM Extender Receiver Upgrade Module - Analog Audio (Bi-Directional), RS232

The ACX1MR-AR is the receiver-side upgrade card for a Black Box DKM modular KVM extender. It adds bidirectional analog audio and an RS232 serial channel to a link that would otherwise carry keyboard, video and mouse alone, so the remote console gets talkback in both directions and a serial control path to the machine at the far end.

It is a modular card that seats in a slot of the DKM chassis rather than a box that sits beside it, so an extender already in service gains the function without being replaced. Connectors are analog audio and serial, bidirectional. Made in Germany.