Intel 537EX manual 3768, +EFCS=m

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Error Correction and Data Compression

Table 21. V.44/V.42/V.42 bis and MNP Data Modem Command Descriptions (Continued)

	Command	Default		Description

			V.44 Data Compression: This command controls the V.44 data compression function if provided in the
			DCE. It accepts the following sub parameters:
			m=[<direction>[,<compression_negotiation>[,<capability>[,<max_codewords_tx>[,<max_codewords_rx>
			[,<max_string_tx>[,<max_string_rx>[,<max_history_tx>[,<max_history_rx>]]]]]]]]]
			<direction> specifies the desired direction(s) of operation of the data compression function.
			0	Negotiated… no compression
			1	Transmit only
			2	Receive only
			3	Both directions, accept any direction
			<compression_negotiation> specifies whether or not the DCE should continue to operate if the desired
			result is not obtained.
			0	Do not disconnect if Rec. V.44 is not negotiated by the remote DCE as specified in
				<direction>. Always set to 0.
		3, 0, 0,	<capability> specifies the use of stream method, packet method, multi-packet method.
		3, 0, 0,	0	Stream method
		471,	0	Stream method
		471,	1	Packet method
		942,	1	Packet method
		942,
	+DS44=m	140,	2	Multi-packet method
		140,	<max_codewords_tx> specifies the maximum number of codewords which should be negotiated in the
		1884,
		1884,	transmit direction.
		3768	transmit direction.
		3768	256 to 65536
			256 to 65536
			<max_codewords_rx> specifies the maximum number of codewords which should be negotiated in the
			receive direction.
			256 to 65536
			<max_string_tx> specifies the maximum string length to be negotiated in the transmit direction.
			32 to 255
			<max_string_rx> specifies the maximum string length to be negotiated in the receive direction.
			32 to 255
			<max_history_tx> specifies the maximum size of the history buffer to be negotiated in the transmit
			direction.
			≥ 512
			<max_history_rx> specifies the maximum size of the history buffer to be negotiated in the receive
			direction.
			≥ 512

			32-bit Frame Check Sequence: Controls the use of 32-bit frame check sequence option in V.42.
	+EFCS=m	0	0	Use 16-bit FCS
	+EFCS=m	0	1	Use 32-bit FCS if available in remote DCE; otherwise use 16-bit FCS
			1
			2	Use 32-bit FCS if available in remote DCE; otherwise disconnect

NOTE: An asterisk (*) denotes the factory-default setting.

536EX Chipset Developer’s Manual

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Intel Confidential

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Contents Developer’s Manual 537EX ChipsetIntel Confidential Contents Figures Tables Date Revision Description Revision History001 Initial release Controllerless Modem Driver Overview IntroductionWindows 95 and Windows Tapi V.90/V.92 and V.34 Data ModesUnimodem Intelsdb.VXDModem Connection Overview DTE-to-DCE Data Rates for Each Mode AT Commands OverviewDCE-to-DCE Data Rates for Each Mode DCE-to-ISP Data Rates for V.90 ModeDelayed Call Sending CommandsDTE-Modem Data Rate Response Codes Numeric TextAT Escape Sequences Command FunctionDial Modifier Dialing digitsCommand Function Default Range Reported By &Vn Data Mode Command SummaryIntel Confidential Intel Confidential Intel Confidential +ESA +EB+ESR +ETBM44/V.42/V.42 bis MNP Command Summary Processes flow control characters and passes to local Fax Class 1 Command Summary Fax Identity Command SummaryVoice DTE→DCE Character Pairs IS-101 Voice Command SummaryResponse Hex Code Function Voice DTE←DCE Character Pairs Voice DTE →DCE Character PairsDEL ESCDial Modifiers Register Function Default Range Units Reported by &VnRegister Summary AsciiRegister Function Default Range Units Modem Responses and Command Echo En, Vn, Xn, Wn, Qn Using AT Commands to Access the S-Registers Sn?, Sn=x, ?Modem Setup Host Modem Response Command Data Reporting Wn Mapping Disable EnableDTE Resets and then configures the modem to Nvram user profile Establishing a Modem Connection A, D, DS = n, S0 AT Commands Product InformationProduct Identification Information Hanging Up Hn, S10, Zn, &D2 Online Command Mode Escape Codes, OnModem-to-Modem Connection Data Rates Intel Confidential Modem-on-Hold Incoming Voice Call in Data Mode Modem-on-Hold Initiating a Voice Call in Data Mode Intel Confidential Carrier Description Supported Modulation TypesLocal Analog Loopback AT&T1 Diagnostic Testing S18, &TnLocal Modem or Test Modem Local Analog Loopback With Self-Test AT&T8Time-Independent Escape Sequence AT Escape SequencesLicensing Requirements for Hayes Escape Sequence Example Command Default Description Data Mode Command DescriptionsHayes* Escape Sequence Host in either online or off-line command mode Previously stored in the Nvram with the AT&Zn=x commandEcho disabled Echo enabledDTE ATI2Sn=x Modem dials a telephone number touch tone dialing CommandNumeric or verbose form Numeric formSubsequent commands to be ignored DisconnectingResets the modem and recalls user profile DCD or Rlsd signalActive Profile AT&V0Stored Profile Telephone NumbersCommand to see the stored telephone number S-register configurations into the Nvram user profile ‘n’Select profile = 0-9 a B C D # * T P R W @Indication Definition Command Default+EB Nrzi encoding and decoding disabled CRC generation and checking disabledSecondary channel operation, and vice versa 12/V.34+ETBM +ESR+GSN +GMR+IFC +ILRR=m+MA? will display a list of enabled alternative modulations +MS command description= carrier,carrier,…carrier If +MS = ,0,, no alternative modulations will be availableBELL103 Carrier DescriptionBELL212 +MS=m See ‘m’+PMHF +PHSW=Value Description +PMHREnable Short Phase 1 and Short Phase Conjunction with the +PSS commandEnable Short Phase Disable short Phase 1 and Short PhaseOperating Modes Mode Features+ES Settings Answer Modem 44/V.42/V.42 bis and MNP Data Modem Command DescriptionsResulting +ES Connection Types +ES=1, 0 +ES=4, 4 +ES=3, 0 +ES=3, 2 \Bn \Kn Direction +DR=m+DS=m Max string+EFCS=m 3768Decimal value and the format is as follows Display messages when +ER =+ER=m +ER LapmControl during non-error control operation Setting is ignored if origrqst=6Non-error control operation +ES=mFax Class 1 Commands Fax Identity CommandsFax Identity Command Descriptions +FMFR?/+FMIValue Modulation Speed bps Mod Selection TableClass 1 DTE-Generated Hdlc Frame Information AT+FTH=mod 30 Hdlc Frame Format+FCLASS? Fax Mode Command Descriptions+FCLASS +FRS=m +FRH=m+FTH=m IS-101 Voice Mode AT Commands Dtmf Detection Reporting Voice Mode Command DescriptionsRelay Control +FLO=m +VDR=m See ‘m’ Enable report FunctionCaller ID report Command Reserved Distinctive ringing All Defaults = ‘C’, BB860980, BFE63883, BB863EE0Event Description +VEM=m See ‘m’EX Value BIT Value Event EIGHT-DIGIT HEX Code B B 8 6 3 E EHEX Digit Location 128 Nominal transmit level Local telephone, or speaker+VIP Label Preassigned Voice I/O Labels+VLS=m Relay/Playback Control Voice I/O Primitive CodesPrimitive Code Description +VSD=m See ‘m’ +VRX141 AD3 3-bit Adaptive differential pulse code modulation +VSM=? command to obtain supported sampling rates+VSM=m Range 4800, 7200, 8000, and 11025 samples/secondSerial CmlHard Disk Compression100 Default value 1 second Factory default is ‘0’100 Range 5-255 units of 0.01 seconds+VTS=m None Dual tones may be sent using the following formatSpecified by +VTD=m This sends a 500 ms period of silenceCommand Default Description Register Command Descriptions S10 Escape sequences Range Seconds Default 0 secondsS16 S22 118 S21S25 S30Modem or when a ring signal is detected Modem exits sleep mode whenever the host reads or writes toSleep mode is disabled by setting S33 to ‘0’ Inactive state whenTag Description Caller ID Tags for Formatted ReportingRing Uart Emulation in Intelsdb.VxD Uart Emulation in the Controllerless ModemTHR UartRBR Parallel Host Interface Uart Register Bit Assignments Scratch Register SCR Uart Register DefinitionsModem Status Register MSR OE Overrun Error-Not supported Bit Framing errorLine Status Register LSR StackProcedure is as follows IER Interrupt Enable registerModem Control Register MCR Line Control Register LCRBit Fifo Control Register FCRInterrupt Control Functions Interrupt Identity Register IIRID1 ID0 ID bit 2 for Fifo mode Interrupt Enable Register IERTransmitter Holding Register THR Dlab =Divisor Latch Registers DLM and DLL Receiver Buffer Register RBRProgrammable Data Rates Data Rate Divisor Number Divisor Latch HexFifo Polled Mode Operation Fifo Interrupt Mode Operation16C550A Uart Fifo Operation 102536EX Chipset Developer’s Manual 103