Serial Port 2nd SFF

HP 638815-001 is a second serial-port part for adding serial connectivity to supported HP desktop systems. HP’s parts map identifies it as the second serial port for the Compaq 4000 Pro Small Form Factor PC and lists the same part number as a serial-port PCI card for the Compaq 8200 Elite SFF.

The part is intended to provide an additional serial connection alongside the system’s standard rear serial port. This makes it useful where a compatible desktop setup needs a further serial interface for attached equipment.

HP lists the part for these SFF systems; the documentation does not establish support for other models or specify package contents.