Can't find 2nd fax modem in windows fax / scan

Hi Everyone,

I setup a fax modem in windows server 2012 R2, it works fine.

Then I put in another fax modem in same server, prepare to let one fax modem receive fax, anther fax modem send fax.

In device manager can detect both fax modem, but in windows fax / scan, it only recognizes one fax modem.

wonder why and how to fix.

Thanks,

itdragon