Int 2F Fn DB00  - Zyxel Zfax V2.0-2.23 - Installation Check                [F]

   AX = DB00h

Return:    AL = 5Bh installed
Program: ZFAX is the bundled FAX software which comes with the ZyXEL model
     fax modems.

See Also: AX=CBDCh,AX=DA01h,AX=DA02h,AX=DA03h