Multi-Tech Systems MT5600SMI-L32 Carrier Detect Response Time Supported for backward, Reserved

				Chapter 5 – AT Commands, S-Registers, and Result Codes
Register	Unit	Range	Default	Description
S9	0.1 s	1–255	6	Carrier Detect Response Time: Supported for backward
				compatibility only. No value can be written. Responds with default
				value. *
S10	0.1 s	1–255	14	Lost Carrier to Hang Up Delay: Sets the length of time, in tenths of
				a second that the modem waits before hanging up after a loss of
				carrier. This allows for a temporary carrier loss without causing the
				local modem to disconnect. When register S10 is set to 255, the
				modem functions as if a carrier is always present. *
				The actual interval the modem waits before disconnecting is the value
				in register S10 minus the value in register S9. Therefore, the S10
				value must be greater than the S9 value or else the modem
				disconnects before it recognizes the carrier.
				Note: For Call Waiting detection, if the modem is set to US country
				code and S10 >=16, then the modem will detect the Call Waiting tone
				and hang-up the line. If S10 <16, the modem will not detect Call
				Waiting tone.
S11	0.001 s	50–255	95	DTMF Tone Duration: 1. For US models, S11 sets the duration of
				tones in DTMF dialing (has no effect on pulse dialing).
				2. For W-class models, S11 is a country parameter. The default is
				country dependent. *
S12	0.02 s	0–255	50	Escape Prompt Delay (EPD): Defines the maximum period, in
				fiftieths of a second, allowed between receipt of the last character of
				the three escape character sequence from the DTE and sending of
				the OK result code to the DTE. If any characters are detected during
				this time, the OK will not be sent. Sending of the OK result code does
				not affect entry into command mode. (See 3.1.3). *
S14			138 (8Ah)	General Bit-Mapped Options Status: Indicates the status of
				command options.
				Bit 0 This bit is ignored.
				Bit 1 Command echo (En)
					0 =	Disabled (E0)
					1 =	Enabled (E1) (Default.)
				Bit 2 Quiet mode (Qn)
					0 =	Send result codes (Q0) (Default.)
					1 =	Do not send result codes (Q1)
				Bit 3 Result codes (Vn)
					0 =	Numeric (V0)
					1 =	Verbose (V1) (Default.)
				Bit 4	Reserved
				Bit 5 Tone (T)/Pulse (P)
					0 =	Tone (T) (Default.)
					1 =	Pulse (P)
				Bit 6	Reserved
				Bit 7	Originate/Answer
					0 =	Answer
					1 =	Originate (Default.)
				S19 is supported for backward compatibility only. No value can be
				written. Responds with default value.
S16			0	Test Mode Bit-Mapped Options Status: Indicates the test in
				progress status.
				Bit 0 Local analog loopback
					0 =	Disabled (Default.)
					1 =	Enabled (&T1)
				Bits 1-7		Not used
S19 and S20				Reserved

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 76