Int 6B Fn 0600 - Novell Nasi/nacs, Ungermann-bass Net One Serial I/o - C [S] AX = 0600h CX = command 02h send break 04h disconnect 06h hold Return: CF clear if successful AL = 00h CF set on error AX < 0 Note: this function is also supported by TelAPI and NPC NCSI