Int 14 Fn B1  - 3com Bapi Serial I/o - Enter Command Mode                  [S]

   AH = B1h

Return: AH = return code (00h,07h,0Ah) (see AH=A0h"BAPI")
Desc:  provide a means for the application or terminal emulator to perform
     the same action normally caused by the ECM character

See Also: AH=B0h,AH=B2h