3Com 56K manual Disable the faster retrains that occur, Disable V.32terbo S38

I-6APPENDIX I: S-REGISTERS

Register	Default	Function
		Bit	Value	Result
		1	2	Disable the Business Modem's
				enhanced, proprietary V.32bis
				modulation. Used for
				troubleshooting.
		2	4	Disable the faster retrains that occur
				during proprietary V.32terbo
				modulation. Used for
				troubleshooting.
		3	8	Enable V.23. Required for some
				British connections.
		6	64	Disable the remote-access busy
				message.
		7	128	Disable V.32terbo.
S38	0	Sets the duration, in seconds, before a forced hang-up and
		clearing of the Transmit buffer when DTR drops during an
		ARQ call. This is provided to allow time for a remote device
		to acknowledge receipt of all transmitted data. Default =
		0: The Business Modem immediately hangs up when DTR
		drops. If the Business Modem receives the ATH command,
		it ignores S38 and immediately hangs up.
S41	0	Sets the number of allowable remote-access login attempts,
		thus enabling or disabling remote access. The default
		setting of zero allows no remote login attempts, thus
		disabling remote access. A value of 1 or greater enables
		remote access. If the number of unsuccessful login
		attempts exceeds the limit set by this register, the Business
		Modem returns online and any further login attempts
		during the remainder of that connection are refused.
S42	126	Stores the ASCII decimal code for the remote-access escape
		character. The default character is a tilde (~).
S43	200	Sets the duration, in fiftieths of a second, of the guard time
		for the remote-access (~~~~) sequence.
S51	0	Bit-mapped register. See Chapter 1, Using the AT
		Command Set, for instructions about how to set
		bit-mapped registers.
		Bit	Value	Result
		0	1	Disable MNP/V.42 for V.22 (1200 bps)
		1	2	Disable MNP/V.42 for V.22bis (2400
				bps)
		2	4	Disable MNP/V.42 for
				V.32/V.32bis/V.32terbo
				(9600/14400/19200/21600 bps).