Intel 536EX manual 3.9.2Local Analog Loopback With Self-TestAT&T8, Intel Confidential, Local Modem

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Figure 6. Local Analog Loopback Test

Data Mode AT COMMANDS

Figure 6. Local Analog Loopback Test

LOCAL MODEM

TXD

TRANSMITTER

DTE

RXD

RECEIVER

Local Modem (or Test Modem)

AT&F &W<CR>	Returns the modem to the factory defaults.
AT S18 = 0 &T1	Causes the modem to run local analog loopback without self-test.
CONNECT 115200	Modem response code indicates that analog loopback is
	enabled with a DTE speed of 115200.

This is a test. Test string that the user could type at the keyboard. If the received data is the same as the test string, then the DTE-to-modem communication channel is working properly.

+++AT	TIES Escape Sequence is used to return to command mode.
OK	Modem enters command mode.
AT&T0	Terminates any loopback test.
OK	Modem aborts analog loopback and stays in command mode.

3.9.2Local Analog Loopback With Self-Test [AT&T8]

This test is used by the local DTE to check the DTE-to-modem communication integrity.

Figure 7. Local Analog Loopback with Self-Test

		LOCAL MODEM
TXD	PATTERN		TRANSMITTER
	PATTERN
	GENERATOR
	GENERATOR
DTE
RXD	PATTERN
	PATTERN		RECEIVER
	CHECKER		RECEIVER
	CHECKER

536EX Chipset Developer’s Manual

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Intel Confidential

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Contents Developer’s Manual 536EX ChipsetJanuary 536EX Chipset Developer’s Manual Intel ConfidentialContents ContentsFigures Tables Date Revision HistoryRevision Description1.1Controllerless Modem Driver Overview Introduction1.1.2Windows 95 and Windows Figure 1. WDM Driver Block DiagramUser applications Kernel - ring01.2V.90/V.92 and V.34 Data Modes Figure 2. VxD Mini Port Driver Block Diagram1.3Modem 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 Table 4. DTE-ModemData Rate Response Codes 1.4.1Sending Commands1.4.3Dial Modifier 1.4.2AT Escape SequencesAT Command Summary Tables AT Command Summary TablesTable 5. Data Mode Command Summary Table 5. Data Mode Command Summary Continued Result code type Table 5. Data Mode Command Summary Continued Generate data mode calling tone Table 6. V.44/V.42/V.42 bis MNP Command Summary Intel Confidential Table 8. Fax Class 1 Command Summary Table 7. Fax Identity Command SummaryTable 10. Voice DTE→DCE Character Pairs Table 9. IS-101Voice Command SummaryTable 11. Voice DTE←DCE Character Pairs Table 10. Voice DTE→DCE Character Pairs ContinuedTable 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 COMMANDSFigure 3. Example of a Remote Connection Table 14. Data Reporting Wn MappingATW0 •ATW2Intel 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 +PCW=0 +PMH=0+VCID=1 +++ATIntel 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 3.9.1Local Analog Loopback AT&T1 3.9Diagnostic Testing S18, &TnLOCAL MODEM 3.9.2Local Analog Loopback With Self-TestAT&T8Figure 6. Local Analog Loopback Test Local Modem or Test ModemLicensing Requirements for Hayes Escape Sequence 3.10.1Time-IndependentEscape SequenceFormat <char1><char2><char3><AT command><contents of S3>char1 = char2 = char3 = escape character S2 3.10.2Hayes* Escape Sequence Table 18. Data Mode Command DescriptionsIntel Confidential Sn=x Intel Confidential Data Mode AT COMMANDS536EX Chipset Developer’s Manual NOTE: An asterisk * denotes the factory-defaultsetting AT&V0 Intel Confidential Indication Command DefaultDefinition 1, 0, Intel Confidential +ETBM +ESR1, 1, +GSN +GMR+IFC +ILRR=mIntel Confidential Description <carrier>+MS=m see ‘m’+PMHF +PHSW=<value> +PMHRIntel Confidential Error Correction and Data Compression Error Correction and Data Compression4Table 19. Operating Modes NOTES Table 20. Resulting +ES Connection TypesIntel Confidential Error Correction and Data Compression536EX Chipset Developer’s Manual Intel Confidential direction +DR=m+DS=m <max string>+EFCS=m 3768+ER=m +ES=m 5.1Fax Identity Commands Fax Class 1 AT Commands5.2Fax Class 1 Commands Fax Class 1 AT CommandsTable 23. <mod> Selection Table Figure 8. T.30 HDLC Frame Format Table 24. Fax Mode Command Descriptions +FRH=m Table 24. Fax Mode Command Descriptions ContinuedRefer to Table 23 on page shown in Table 23 on page+FTH=m IS-101Voice Mode AT Commands IS-101Voice Mode AT Commands6.1DTMF Detection Reporting Table 25. Voice Mode Command Descriptions6.2Relay Control m = <deassert>, <assert> +FLO=m+VDR=m m=<enable>, <report>+VEM=m m = <mask>Intel Confidential +VIP +VLS=m Preassigned Voice I/O LabelsRelay/Playback Control: cont Voice I/O Primitive Codesm = <sds>, <sdi> +VRX+VSD=m +VSM=m m= <cml>, <vsr>, <scs>, <sel>Transmission: Range: +VSP=m Compression Method Selection: contfactory default is ‘0’ none +VTS=mDefault CommandDescription DTMF and Tone Generation: contTable 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 RING RING RING DATE = TIME = NMBR = NAME = DOE JOHN MESG =<DLE> R NMBR =UART Parallel Host Interface 16C450/16C550AParallel Host Interface 16C450/16C550A UART Figure 11. UART Emulation in Intelsdb.VxDUART Receiver Flow Diagram UART Transmitter Flow DiagramBIT NUMBER REGISTERADDRESS NAME9.2.2Modem Status Register MSR 9.2.1Scratch Register SCRFigure 14. Scratch Register SCR Figure 15. Modem Status Register MSRFigure 16. Line Status Register LSR 9.2.3Line Status Register LSR9.2.5Line Control Register LCR 9.2.4Modem Control Register MCRFigure 17. Modem Control Register MCR Figure 18. Line Control Register LCRRegister 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 Figure 21. Interrupt Enable Register IER 9.2.8Interrupt Enable Register IER9.2.9Transmitter Holding Register THR Figure 22. Transmitter Holding Register THR9.2.11Divisor Latch Registers DLM and DLL 9.2.10Receiver Buffer Register RBRFigure 23. Receiver Buffer Register RBR Figure 24. Divisor Latch Registers DLM and DLL9.3.1FIFO 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