The AX92906 from Axiomtek is a Full-size PCI Express Mini Module with COM in the form of 2 x RS-232 ports. It has a USB connector to 2 channels of high speed RS-232 ports. The module also supports one half-size PCI Express Mini card slot.
USB to 2 Channel high speed RS-232 ports
Supports: one half-size PCI Express Mini card slot (PCIe only)
Form factor: Full-size PCI Express Mini Card
Specification: 2 COM ports (2 x RS-232) and half-size PCI Express Mini Card slot (PCIe only)