Int 14 Fn A7  - 3com Bapi Serial I/o - Read Status                         [S]

   AH = A7h
   DH = session ID (00h for external session managment)

Return: AH = return code (00h,03h,07h,0Ah,0Bh) (see AH=A0h"BAPI")
   CX = number of bytes available for reading

Note:  Novell TELAPI.EXE v4.01 always returns either 0 or 1 bytes available

See Also: AH=A5h"BAPI"