This seem to be an ASKEY modem, model is V1456VQH-P, Chip PCTEL PCT388P-A.
Two operating modes according to JP4,JP5, JP6 PnP (ON, ON, OFF) or not PnP (OFF, OFF, ON). If Pnp, just tell windows where the driver is (unzip the file) If not PnP, First install the port through the control panel, add new hardware... and then the modem from the Modems icon. Restart and test.
Hope it works fine for you.Micky