INT 6B - NPC NCSI EXTENDED SERIAL I/O - ALLOCATE A VIRTUAL CIRCUIT
        AH = 11h
        ???
Return: CF clear if successful
            AL = virtual circuit number??? (01h for Novell TELAPI.EXE)
            CL = ??? (01h for Novell TELAPI.EXE)
            CH = ??? (01h for Novell TELAPI.EXE)
        CF set on error
            ???
Note:   this function is also supported by TelAPI
SeeAlso: AH=12h,AH=15h,AH=16h,AH=17h,AH=18h

.