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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

		MNP Block Size: This command specifies the maximum number of data bytes in an MNP data frame. A
		smaller frame size may improve throughput on high-impairment (noisy) telephone lines.
		Range: 0–3
\An	3	n = 0	Maximum 64 characters
		n = 1	Maximum 128 characters
		n = 2	Maximum 192 characters
		n = 3*	Maximum 256 characters

		Transmit Break: This command causes the modem to send a break (attention signal) to the remote for
\Bn	3	duration specified by ‘n’. ‘n’ is specified in 100 ms units. When n = 0, the default break length is used.
		Range: 0–9

		Set Auto-Reliable Buffer (requires a license from Microcom*): In auto-reliable mode (+ES=3,0,2), this
		command determines the fallback method and enables data buffering. The settings for this command are
		used by the modem during the V.42 detection phase.
		Range: 0–2
\Cn	0	n = 0*	Does not buffer data.
		n = 1	Reserved.
		n = 2	Does not buffer data. Switches to buffer (normal) mode upon receipt of auto-reliable
			fallback character and passes it to serial port. This feature allows non-V.42 modems to
			connect immediately to a V.42 modem without data loss.

		Set Modem Port Flow Control: In buffer (normal) mode (either +ES=1,0,1 or after fallback), this
		command enables modem-to-modem flow control using XOFF (13h) to stop and XON (11h) to start
\Gn	0	transmission between modems.
\Gn	0	n = 0, 1
		n = 0, 1
		n = 0*	Disables port flow control
		n = 1	Sets port flow control to XON/XOFF

		bps Rate Adjust Control: If this command is enabled, the serial port speed automatically changes to the
		modem-connection speed. This forces the user to change the DTE-to-modem bps rate, if needed. If the
		command is disabled, the serial port speed is independent of the connection speed, which allows much
\Jn	0	greater throughput when using error correction and data compression.
\Jn	0	n = 0, 1
		n = 0, 1
		n = 0*	Turns off feature
		n = 1	Turns on feature

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

58	536EX Chipset Developer’s Manual

Intel Confidential

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Intel manual Intel Confidential, Error Correction and Data Compression, 536EX Chipset Developer’s Manual

Contents

Developer’s Manual 536EX ChipsetJanuary Intel Confidential 536EX Chipset Developer’s Manual Contents Contents Figures Tables Revision Revision HistoryDate Description Introduction 1.1Controllerless Modem Driver Overview User applications Figure 1. WDM Driver Block Diagram1.1.2Windows 95 and Windows Kernel - ring0 Figure 2. VxD Mini Port Driver Block Diagram 1.2V.90/V.92 and V.34 Data Modes 1.3Modem Connection Overview Table 2. DCE-to-DCEData Rates for Each Mode Table 1. DTE-to-DCEData Rates for Each ModeTable 3. DCE-to-ISPData Rates for V.90 Mode 1.4.1Sending Commands Table 4. DTE-ModemData Rate Response Codes 1.4.2AT Escape Sequences 1.4.3Dial Modifier AT Command Summary Tables AT Command Summary TablesTable 5. Data Mode Command Summary Table 5. Data Mode Command Summary Continued Result code type Intel Confidential Generate data mode calling tone Table 6. V.44/V.42/V.42 bis MNP Command Summary connect state, transmits Table 7. Fax Identity Command Summary Table 8. Fax Class 1 Command Summary Table 9. IS-101Voice Command Summary Table 10. Voice DTE→DCE Character Pairs Table 10. Voice DTE→DCE Character Pairs Continued Table 11. Voice DTE←DCE Character Pairs Table 12. Dial Modifiers Table 11. Voice DTE←DCE Character Pairs ContinuedTable 13. S-RegisterSummary Table 13. S-RegisterSummary Continued Data Mode AT COMMANDS Data Mode AT COMMANDS ATW0 Table 14. Data Reporting Wn MappingFigure 3. Example of a Remote Connection •ATW2 Intel Confidential +FMFR?, +FMDL?, +FREV? 3.7Hanging Up Hn, S10, Zn, &D2 3.6Online Command Mode Escape Codes, On3.8Modem-to-ModemConnection Data Rates Intel Confidential +VCID=1 +PMH=0+PCW=0 +++AT Intel Confidential hook to connect the call. Now you can answer the phone and talk. After completing your voice conversation, the modem will issue another +PMHF and ATO command to initiate a Quick Connect. If the server rejects the request to go on hold, the user can stay on line ATO command issued or disconnect from his initial data connection ATH command issued Table 16. Supported Modulation Types 3.9Diagnostic Testing S18, &Tn 3.9.1Local Analog Loopback AT&T1 Figure 6. Local Analog Loopback Test 3.9.2Local Analog Loopback With Self-TestAT&T8LOCAL MODEM Local Modem or Test Modem 3.10.1Time-IndependentEscape Sequence Licensing Requirements for Hayes Escape Sequence Format <char1><char2><char3><AT command><contents of S3>char1 = char2 = char3 = escape character S2 Table 18. Data Mode Command Descriptions 3.10.2Hayes* Escape Sequence Intel Confidential Sn=x Intel Confidential Data Mode AT COMMANDS536EX Chipset Developer’s Manual Intel Confidential AT&V0 Intel Confidential Indication Command DefaultDefinition 1, 0, Intel Confidential +ETBM +ESR1, 1, +IFC +GMR+GSN +ILRR=m modulations +MS=m <carrier>Description see ‘m’ <value> +PHSW=+PMHF +PMHR Intel Confidential Error Correction and Data Compression Error Correction and Data Compression4Table 19. Operating Modes Table 20. Resulting +ES Connection Types NOTES Intel Confidential Error Correction and Data Compression536EX Chipset Developer’s Manual Intel Confidential +DS=m +DR=mdirection <max string> 3768 +EFCS=m +ER=m +ES=m 5.2Fax Class 1 Commands Fax Class 1 AT Commands5.1Fax Identity Commands Fax Class 1 AT Commands Table 23. <mod> Selection Table Figure 8. T.30 HDLC Frame Format Table 24. Fax Mode Command Descriptions Refer to Table 23 on page Table 24. Fax Mode Command Descriptions Continued+FRH=m shown in Table 23 on page +FTH=m IS-101Voice Mode AT Commands IS-101Voice Mode AT Commands 6.1DTMF Detection Reporting Table 25. Voice Mode Command Descriptions6.2Relay Control +FLO=m m = <deassert>, <assert> m=<enable>, <report> +VDR=m m = <mask> +VEM=m Intel Confidential +VIP Preassigned Voice I/O Labels +VLS=m Voice I/O Primitive Codes Relay/Playback Control: cont m = <sds>, <sdi> +VRX+VSD=m +VSM=m m= <cml>, <vsr>, <scs>, <sel>Transmission: Range: Compression Method Selection: cont +VSP=m factory default is ‘0’ +VTS=m none Description CommandDefault DTMF and Tone Generation: cont Table 26. S-RegisterCommand Descriptions S-RegistersS-Registers S-Registers Intel Confidential536EX Chipset Developer’s Manual S-Registers Intel Confidential536EX Chipset Developer’s Manual S-Registers Intel Confidential536EX Chipset Developer’s Manual S-Registers Caller ID Caller IDTable 27. Caller ID Tags for Formatted Reporting <DLE> R RING DATE = TIME = NMBR = NAME = DOE JOHN MESG =RING RING NMBR = Parallel Host Interface 16C450/16C550A UART Parallel Host Interface 16C450/16C550AUART Figure 11. UART Emulation in Intelsdb.VxD UART Transmitter Flow Diagram UART Receiver Flow Diagram ADDRESS REGISTERBIT NUMBER NAME Figure 14. Scratch Register SCR 9.2.1Scratch Register SCR9.2.2Modem Status Register MSR Figure 15. Modem Status Register MSR 9.2.3Line Status Register LSR Figure 16. Line Status Register LSR Figure 17. Modem Control Register MCR 9.2.4Modem Control Register MCR9.2.5Line Control Register LCR Figure 18. Line Control Register LCR Register 9.2.6FIFO Control Register FCRFigure 19. FIFO Control Register FCR Figure 20. Interrupt Identity Register IIR 9.2.7Interrupt Identity Register IIRTable 28. Interrupt Control Functions 9.2.9Transmitter Holding Register THR 9.2.8Interrupt Enable Register IERFigure 21. Interrupt Enable Register IER Figure 22. Transmitter Holding Register THR Figure 23. Receiver Buffer Register RBR 9.2.10Receiver Buffer Register RBR9.2.11Divisor Latch Registers DLM and DLL Figure 24. Divisor Latch Registers DLM and DLL 9.3.1FIFO Interrupt Mode Operation 9.316C550A UART FIFO Operation9.3.2FIFO Polled Mode Operation Parallel Host Interface 16C450/16C550A UART Intel Confidential536EX Chipset Developer’s Manual