3Com 56K manual Bit Value Result

A-6APPENDIX A: S-REGISTERS

Register	Default	Function
S13	0	Bit-mapped register. See the beginning of this appendix for
		information about setting bit-mapped registers.
		Bit	Value	Result
		0	1	Reset when DTR drops.
		1	2	Reverse normal Auto Answer
				operation: On incoming RING, enter
				Originate Mode and look for an
				answer tone.
		2	4	Disable 250 ms pause before result
				code display.
		3	8	On DTR signal, autodial the number
				stored in NVRAM at position 0.
		4	16	At power-on/reset, autodial number
				stored in NVRAM at position 0.
		5	32	Disable HST (used for testing
				V.32terbo in Business Modems).
		6	64	Disable MNP Level 3 (used for
				testing Level 2).
		7	128	Hardware reset (works like
				powering off and then on).
S14	1	Bit-mapped register (See the beginning of this appendix for
		information about setting bit-mapped registers).
		Bit	Value	Result
		0	1	Disconnect on escape code.
S15	0	Bit-mapped register. (See the beginning of this appendix for
		information about setting bit-mapped registers).
		Bit	Value	Result
		0	1	Disable the Business Modem's extra
				high-frequency equalization if it
				causes problems on shorter-link
				calls for HST modulation only.
		1	2	Disable online fallback.
		2	4	Disable 450 bps back channel* HST
				only.
		3	8	Reset non-ARQ mode Transmit
				buffer from 1.5K bytes to 128.* (for
				the convenience of BBS operators

taking calls from remote users of slower modems).