Intel 537EX manual Setting is ignored if origrqst=6, +ES=m, Range 0-2, Non-error control operation

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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

Error Control Selection: The +ES=m command controls the operation of the V.42 error detection and correction protocol in the DCE. Once a connection has been established between the DCE and DTE, the <orig_rqst> subparameter can put the interface into synchronous access mode. In the default settings, synchronous access mode is disabled. To change modes, send another +ES command.

+ES=1,0,1

Buffered mode

+ES=4,4,6

MNP reliable mode

+ES=3,0,2*

V.42 autoreliable mode

+ES=3,2,4

V.42 reliable mode

+ES=2,3,5

LAPM reliable mode

+ES=6, ,8

Synchronous access mode

m= <orig_rqst>, <orig_fbk>, <ans_fbk> Defaults: m = 3, 0, 2

<orig_rqst> Specifies the initial requested mode of operation when the DCE is the originator. If <orig_rqst>=6, the modem ignores the <orig_fbk> setting.

Range: 1–4, 6

0Reserved.

1Initiate call with buffered mode only.

2Initiate V.42 without detection phase. If V.80 mode is in use, this is a request to disable V.42 detection phase.

 

3*

Initiate V.42 with detection phase.

 

4

Initiate alternate protocol.

 

6

Initiate synchronous access mode when connection is completed and when in data state.

 

<orig_fbk> Specifies the acceptable fallback mode of operation when the DCE is the originator. This

 

setting is ignored if <orig_rqst>=6.

+ES=m

Range: 0–2, 4

see ‘m’

Error control optional (either LAPM or alternative acceptable). If error control is not

 

0*

 

 

established, maintain the DTE-DCE data rate and use the V.14 buffered mode with flow

 

 

control during non-error control operation.

1Error control optional (either LAPM or alternative acceptable). If error control is not established, change the DTE-DCE data rate to match the line rate and use direct mode.

2Error control required (either LAPM or alternative acceptable). If error control is not established, disconnect.

3Reserved.

4Error control required (only alternative protocol acceptable). If error control is not established, disconnect.

<ans_fbk> Specifies the acceptable fallback mode of operation when the DCE is the answerer.

Range: 1, 2, 4–6, 8

0Direct mode.

1Error control disabled, use buffered mode.

2*

Error control optional (either LAPM or alternative acceptable). If error control is not

 

established, maintain the DTE-DCE data rate and use local buffering and flow control during

 

non-error control operation.

3Reserved.

4Error control is required (either LAPM or alternative is acceptable). If error control is not established, disconnect.

5Error control required (only LAPM acceptable). If error control is not established, disconnect.

6Error control required (only the alternative protocol is acceptable). If error control is not established, disconnect.

8

Initiate synchronous access mode when the connection is complete and data state is entered.

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

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Intel Confidential

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Contents Developer’s Manual 537EX ChipsetIntel Confidential Contents Figures Tables Revision History Date Revision Description001 Initial release Controllerless Modem Driver Overview IntroductionWindows 95 and Windows Intelsdb.VXD V.90/V.92 and V.34 Data ModesTapi UnimodemModem Connection Overview DCE-to-ISP Data Rates for V.90 Mode AT Commands OverviewDTE-to-DCE Data Rates for Each Mode DCE-to-DCE Data Rates for Each ModeNumeric Text Sending CommandsDelayed Call DTE-Modem Data Rate Response CodesDialing digits Command FunctionAT Escape Sequences Dial ModifierCommand Function Default Range Reported By &Vn Data Mode Command SummaryIntel Confidential Intel Confidential Intel Confidential +ETBM +EB+ESA +ESR44/V.42/V.42 bis MNP Command Summary Processes flow control characters and passes to local Fax Class 1 Command Summary Fax Identity Command SummaryIS-101 Voice Command Summary Voice DTE→DCE Character PairsResponse Hex Code Function ESC Voice DTE →DCE Character PairsVoice DTE←DCE Character Pairs DELAscii Register Function Default Range Units Reported by &VnDial Modifiers Register SummaryRegister Function Default Range Units Using AT Commands to Access the S-Registers Sn?, Sn=x, ? Modem Responses and Command Echo En, Vn, Xn, Wn, QnModem Setup Host Modem Response Command Disable Enable Data Reporting Wn MappingDTE Resets and then configures the modem to Nvram user profile AT Commands Product Information Establishing a Modem Connection A, D, DS = n, S0Product Identification Information Online Command Mode Escape Codes, On Hanging Up Hn, S10, Zn, &D2Modem-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&T8AT Escape Sequences Time-Independent Escape SequenceLicensing Requirements for Hayes Escape Sequence Example Data Mode Command Descriptions Command Default DescriptionHayes* Escape Sequence Echo enabled Previously stored in the Nvram with the AT&Zn=x commandHost in either online or off-line command mode Echo disabledATI2 DTESn=x Numeric form CommandModem dials a telephone number touch tone dialing Numeric or verbose formDCD or Rlsd signal DisconnectingSubsequent commands to be ignored Resets the modem and recalls user profileTelephone Numbers AT&V0Active Profile Stored Profile= 0-9 a B C D # * T P R W @ S-register configurations into the Nvram user profile ‘n’Command to see the stored telephone number Select profileIndication Definition Command Default+EB 12/V.34 CRC generation and checking disabledNrzi encoding and decoding disabled Secondary channel operation, and vice versa+ETBM +ESR+ILRR=m +GMR+GSN +IFCIf +MS = ,0,, no alternative modulations will be available +MS command description+MA? will display a list of enabled alternative modulations = carrier,carrier,…carrier+MS=m See ‘m’ Carrier DescriptionBELL103 BELL212+PMHR +PHSW=+PMHF Value DescriptionDisable short Phase 1 and Short Phase Conjunction with the +PSS commandEnable Short Phase 1 and Short Phase Enable Short PhaseOperating Modes Mode Features+ES=1, 0 +ES=4, 4 +ES=3, 0 +ES=3, 2 44/V.42/V.42 bis and MNP Data Modem Command Descriptions+ES Settings Answer Modem Resulting +ES Connection Types\Bn \Kn Max string +DR=m Direction +DS=m+EFCS=m 3768+ER Lapm Display messages when +ER =Decimal value and the format is as follows +ER=m+ES=m Setting is ignored if origrqst=6Control during non-error control operation Non-error control operation+FMFR?/+FMI Fax Identity CommandsFax Class 1 Commands Fax Identity Command DescriptionsValue Modulation Speed bps Mod Selection TableClass 1 DTE-Generated Hdlc Frame Information AT+FTH=mod 30 Hdlc Frame FormatFax Mode Command Descriptions +FCLASS?+FCLASS +FRS=m +FRH=m+FTH=m IS-101 Voice Mode AT Commands Voice Mode Command Descriptions Dtmf Detection ReportingRelay Control +FLO=m +VDR=m See ‘m’ Enable report Function+VEM=m See ‘m’ Defaults = ‘C’, BB860980, BFE63883, BB863EE0Caller ID report Command Reserved Distinctive ringing All Event DescriptionEIGHT-DIGIT HEX Code B B 8 6 3 E E EX Value BIT Value EventHEX Digit Location Local telephone, or speaker 128 Nominal transmit level+VIP Preassigned Voice I/O Labels Label+VLS=m Voice I/O Primitive Codes Relay/Playback ControlPrimitive Code Description +VSD=m See ‘m’ +VRXRange 4800, 7200, 8000, and 11025 samples/second +VSM=? command to obtain supported sampling rates141 AD3 3-bit Adaptive differential pulse code modulation +VSM=mCompression CmlSerial Hard DiskRange 5-255 units of 0.01 seconds Factory default is ‘0’100 Default value 1 second 100This sends a 500 ms period of silence Dual tones may be sent using the following format+VTS=m None Specified by +VTD=mCommand Default Description Register Command Descriptions S10 Range Seconds Default 0 seconds Escape sequencesS16 S30 S21S22 118 S25Inactive state when Modem exits sleep mode whenever the host reads or writes toModem or when a ring signal is detected Sleep mode is disabled by setting S33 to ‘0’Tag Description Caller ID Tags for Formatted ReportingRing Uart Emulation in Intelsdb.VxD Uart Emulation in the Controllerless ModemUart THRRBR Parallel Host Interface Uart Register Bit Assignments Uart Register Definitions Scratch Register SCRModem Status Register MSR Stack Bit Framing errorOE Overrun Error-Not supported Line Status Register LSRLine Control Register LCR IER Interrupt Enable registerProcedure is as follows Modem Control Register MCRBit Fifo Control Register FCRInterrupt Identity Register IIR Interrupt Control FunctionsID1 ID0 Dlab = Interrupt Enable Register IERID bit 2 for Fifo mode Transmitter Holding Register THRData Rate Divisor Number Divisor Latch Hex Receiver Buffer Register RBRDivisor Latch Registers DLM and DLL Programmable Data Rates102 Fifo Interrupt Mode OperationFifo Polled Mode Operation 16C550A Uart Fifo Operation536EX Chipset Developer’s Manual 103
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