Fujitsu FMW4503TS128A01 manual Command Specification Default

	Command			Specification	Default
/N		0	Normal speed-buffered mode.
		1	Direct mode (if parallel I/F is selected, same as /NO).
		2	MNP reliable mode (MNP -> disconnect)
		3	Auto-reliable mode (LAPM -> MNP -> NORMAL -> disconnect).		3
			Same as /N5.
		4	LAPM-reliable mode (LAPM -> disconnect)
		5	Auto-reliable mode (LAPM -> MNP -> NORMAL -> disconnect).
			Same as /N3.
/V		0	Disable protocol result code appended to DCE speed.
		1	Enable protocol result code appended to DCE speed.		3
		2	Same as /V1.
/X		0	Do not pass XON/XOFF flow control characters.		3
		1	Pass XON/XOFF flow control characters.
-V90=<n>			=0	Disable V.90
			=1	Enable V.90 Auto Rate	3
			=2	Attempt to connect at 28000 bit/s
			=3	Attempt to connect at 29333 bit/s
			=4	Attempt to connect at 30666 bit/s
			=5	Attempt to connect at 32000 bit/s
			=6	Attempt to connect at 33333 bit/s
			=7	Attempt to connect at 34666 bit/s
			=8	Attempt to connect at 36000 bit/s
			=9	Attempt to connect at 37333 bit/s
			=10	Attempt to connect at 38666 bit/s
			=11	Attempt to connect at 40000 bit/s
			=12	Attempt to connect at 41333 bit/s
			=13	Attempt to connect at 42666 bit/s
			=14	Attempt to connect at 44000 bit/s
			=15	Attempt to connect at 45333 bit/s
			=16	Attempt to connect at 46666 bit/s
			=17	Attempt to connect at 48000 bit/s
			=18	Attempt to connect at 49333 bit/s
			=19	Attempt to connect at 50666 bit/s
			=20	Attempt to connect at 52000 bit/s

AT Commands Table 83