Multi-Tech Systems MT2834MR6 manual Registers

Chapter 4 - S-Registers

4.1Introduction

This chapter describes the MT2834MR6’s S-registers, which are small regions of memory where modem configuration information is stored. Whereas AT commands tell a modem what to do, S-registers tell the modem how to do it. Each S-register has a name that consists of the letter S and a number (S0, S1, S2, etc.), hence the term S-register. Use the Sr? command to read the value stored in an S-register, and the Sr=n command to change it.

4.2S-Registers

S0	Number of Rings Until Modem Answers
	Unit: 1 ring
	Range: 0–255
	Default: 1
	S0 defines the number of rings the modem waits before answering an incoming call. The
	default value is one ring, which causes the modem to answer the call immediately after the
	first ring. The maximum number of rings that can be configured is 255. Setting the value to
	zero disables autoanswer.
S1	Ring Count
	Unit: 1 ring
	Range: 0–255
	Default: 0
	S1 counts the number of rings that have occurred. It is a “read” type of register and is
	seldom, if ever, used in typical operation. Each time an incoming ring signal is detected, S1
	increases its value by one, up to a maximum of 255. If you set S1 to a value other than its
	default value of zero, or if the value is increasing with rings, this new value remains stored
	in S1 for eight seconds after the last ring is counted, after which the value reverts back to
	zero.
S2	Escape Code Character
	Unit: Decimal
	Range: 0–127
	Default: 43 (+)

S2 defines the escape code character by its decimal ASCII code. The default character is the plus (+) sign (decimal 43). S2 may be set for any ASCII character. Setting an S2 value greater than 127 results in no escape character, and therefore no means of entering command mode from online mode without breaking the online connection, unless you use the BREAK method. See Appendix H, “Multi-Tech Escape Methods.”

Note: If you change the S2 value, you must make corresponding changes in your data communications software.

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