Digi 90000583_A manual =XON/XOFF &K4

Register		Function	Range	Units	Saved	Default
	General Bit Mapped Options Status
	Telnet support for modem emulation.
	Default:0
	Bit 0-1 Send TCP transmit data timer
	0 = 100ms
	1 = 200 ms
	2 = 300 ms
	3 = 500 ms
	Bits 2-3 Service TCP transmit data watermark
	0	= 256
	1	= 512
	2	=768
S37	3	=1024	-	-	*	0
	Bits 4-5 Service TCP receive data watermark
	0	= 256
	1	= 512
	2	=768
	3	=1024
	Bits 6-7 Telnet support (RFC 2217)
	0	= Disabled
	1	= Receive Telnet support enabled
	2	= Transmit Telnet support enabled
	3	= Receive and Transmit Telnet support
	enabled
S38	Accepted but ignored.		0-255	s		20
	Flow Control Bit Mapped Options Status
	Default:3 (00000011b)
	Bits 0-2Status of command options
	0	=No flow control
S39	3	=RTS/CTS (&K3) (Default.)	-	-	*	3
	4	=XON/XOFF (&K4)
	5	=Transparent XON (&K5)
	6	=Both methods (&K6)
	Bits 3-7Reserved
S40	Accepted but ignored.		-	-	*	104
						(68h)
S41	Accepted but ignored.		-	-	*	195
						(C3h)
S42 - S45	Reserved		-	-		-
S46	Accepted but ignored.		-	-	*	138
S48	Accepted but ignored.		-	-	*	7
S82	Accepted but ignored.		-	-		128(40h)
S86	Accepted but ignored.		0-255	-		-

56 Chapter 7 Special Features: Modem Emulation