INT 2F - Communicating Applications SpecificationDCA and Intel's standard programmatic interface for sending and receiving FAXes via any of a number of internal FAX boards. - INSTALLATION CHECK
	AX = CB00h
Return: AL = status
	    00h not installed, OK to install
	    01h not installed, not OK to install
	    FFh installed
Note:	AH = CBh is the default identifier, but may be reconfigured
SeeAlso: AH=2Ah,AX=8000h"FaxBIOS",AX=CB0Eh,AX=CBDCh