Response, Connect 1CRLF | Silicon Laboratories SI2493/57/34/15/04

AN93

After the host receives “CONNECT “, it sends the frame data followed by <DLE><ETX>. A frame includes type, length, payload and checksum. The frame data can contain anything, including <DLE><ETX>. No DLE shielding is needed. <DLE><ETX> with no data for about 8ms is treated as the end of frame.

After a frame has been sent, the modem response will be: <CR><LF>OK<CR><LF>

On the answer modem side, the command AT+FRM=200 causes the receiver to look for at least 32 bits of CS and for at least 60 bits of marks. The answer modem detects the protocol of the transaction by whether CS comes before the marks.

AT+FRM=200	Receive an SMS frame

AT:UD2,<RxTimeout>	Set RxTimeout:

There can be several responses to AT+FRM=200, depending on the received data.

9.2.2.2. Response 1

If the frame had not been received within the time specified in RxTimeout, the modem response to the host would be:

<DLE><ETX><CR><LF>NO CARRIER<CR><LF>

9.2.2.3. Response 2

If the frame had been received with a mark segment at beginning of frame, the modem would respond to the host with:

CONNECT 1<CR><LF>

<Frame Data Received><DLE><ETX> <CR><LF>OK <CR><LF>

No frame checking would be done by the modem; all of that would be left to the host. As shown above, <DLE><ETX> marks the end of frame. After sending OK to the host, the modem goes back into command mode.

9.2.2.4. Response 3

If the frame had been received with channel seizure and mark segment detected at beginning of frame, the modem would send one of the responses below to the host:

CONNECT 2<CR><LF>

<Frame Data Received><DLE><ETX> <CR><LF>OK <CR><LF>

The Host does all upper level frame validations, since the modem does not do any frame checking. As shown above, <DLE><ETX> signifies the end of frame. After the modem sends OK, it goes back to command mode.

238

Rev. 1.3

Image 238

Silicon Laboratories SI2493/57/34/15/04, SI2494/39 manual Response, Dleetxcrlfno Carriercrlf, Connect 1CRLF, Connect 2CRLF

Contents

Functional Block Diagram Introduction AN93 Table of Contents AN93 AN93 AN93 AN93 Document Change List Contact Information Protocols Selection GuideModulations Protocol Function Si2494/93 Si2457 Si2439/34 Si2415 Si2404 Release Carriers and TonesISOmodem Capabilities Part Numbers Package Reset Sequence Resetting the DeviceModem System-Side Device Reset Strapping General Considerations Mode Reset-Strap Pins Interface Input Clock Pin 5, RXD/MISO SOIC-16 Reset-Strap OptionsReset-Strap Options for 16-Pin Soic Package Reset-Strap Options for 24-Pin Tssop Package TSSOP-24 UART-Interface Options TSSOP-24 Parallel-Interface Options Reset Strapping Options for QFN Parts with Uart Operation TSSOP-24 SPI-Interface Clock-Frequency Options Reset Strapping Options for QFN parts with SPI Operation Input Clk Pin Functions vs. Interface Mode TSSOP-24 Pin Functions vs. Interface Mode SOIC-16System Interface Pin Functions vs. Interface Mode QFN-38 SPI-Interface Signals UART-Interface SignalsParallel-Interface Signals Ideal DTE Rate bps Actual DTE Rate bps Approximate Error% DTE Rates Symbol Data bits Parity Stop bits Serial Formats Detected in Autobaud ModeFlow Control PPD Can MonitorU70 Bit Function OCD Uart Serial Interface Parallel and SPI Interface Operation TX Fifo Hardware Interface Register Bit Map Hardware Interface Register Signal Function Direction Parallel Interface SignalsParallel Interface Operation Parallel Interface Read Timing SPI Interface Operation Bit Function Meaning when High Meaning when LowSPI Control-and-Address Bit Definitions Interface Communication Modes Wake-on-Ring Mode Low-Power ModesPower-Down Mode Sleep Mode Clkout Fsync SDI SDO Reset SSI/Voice Mode 24-Pin Tssop and 38-Pin QFN OnlySignal Pin Number TSSOP-24 QFN-38 SSI Interface Pin Connection Eeprom Status Register Any Other Bits are Unused Eeprom CommandsEeprom Interface 24-Pin Tssop and 38-Pin QFN Only Eeprom Timing EOZ Parameter Symbol Min Typ Max UnitEcsh Eecs Detailed Eeprom Examples Three-Wire SPI Interface to EepromBoot Commands Custom Defaults Eeprom Firmware Upgrades AT Command Macros Customized AT CommandsBoot Command Example AT Command Macro Example Autoloading Firmware Upgrade Example Combination Example Command FunctionCombination Example Ascii Chart Dec Hex Display Hookswitch and DC Termination DAA Line-Side Device Ringer Impedance and Threshold AC Termination Settings for the Si3018 Line-Side DeviceAC Termination Pulse Dialing and Spark Quenching Typical Loop Voltage LVS Transfer Function Loop Current Transfer Function Ilim =LVCS40 Condition Legacy-Mode Line Voltage and Loop Current Measurement Billing Tone Detection Hardware Design Reference Power Supply and Bias CircuitryHookswitch and DC Termination Component Functions Ringer Network Optional Billing-Tone Filter Symbol Value TIP From Line Ring DAA EMI/EMC Schematic Si3018/10 Schematic Bill of Materials Component Value Suppliers Layout Guidelines Reference Placement ISOmodem Layout Check List Layout ChecklistLayout Items Required AN93 Module Design Module Design and Application ConsiderationsMotherboard Design Modem Module VCC and Reset Filter Analog Output Audio Filter Response Audio Quality Modem Reference Guide Controller Command Action AT Command SetConfiguration Status DSP Command Result Comment Command ExamplesMultiple AT Commands on a Single Line Command Result Basic AT Command Set Consecutive U-Register Writes on a Single Line Modifier EnableNo Patch AT Command Chip Revision ATI0 ATI1 Revision C Patch rcpXYYYY AT Command Chip RevisionRevision B Patch rbpXYYYY ATI0 Enable result codes See Table Speaker is always off Command Action Verbal result codes Program RAM write this command is used to upload firmware +DRNONE Disabled+DR=X +DRV42B RD Specifies the mode of operation when answer a modem Specifies the mode of operation when initiating a modemConnection = Disable synchronous access mode C,D Specifies action taken if an underrun condition occurs = CRC generation checking disable= Nrzi encoding and decoding disabled During transparent sub-mode Class 1 Transmit Carrier United States default Country Automatically detect the baud rate +GCI?Fixed DTE Rate BPS ITU-T V.34 default for Si2434 V22B ITU-T V.22bis default for Si2404V32B ITU-T V.32bis default for Si2415 ITU-T V.90 default for Si2457 +PMHT=X Enable Short Phase 1 and Short Phase+PMHR=X +PQC=X = Off DCEs decide to use short startup procedures= After ring only Distinctive Ring DTE/DCE Inactivity Timer Command Action Transmit Gain SelectionLoad Voice Factory Defaults ISOmodem on-hook. Aout disabled. Tone detec OK result code. Default time is 0 seconds Ringing Tone Goes Away TimerRinging Tone Never Appeared Timer Is five seconds Voice Compression Method Speakerphone AEC, AES and LEC disabledDtmf / Tone Duration Timer Signed PCM Kbps max default for Si2415 Extended AT CommandsExtended AT& Command Set Kbps max default for Si2457 transmit and Si2434 Only 56 kbps to 28 kbps TIP + ISOmodem answers a call in answer mode Extended AT% Command SetEnable V.42bis in transmit and receive paths Disable automatic line-in-use detection Extended AT\ Command Set Mode is not allowed with a parallel or SPI interface \P0 Even \Q2 Use CTS only \T16 Autobaud On4 \T9 Kbps4\V0 Report connect and protocol message Result Codes Numeric1 Meaning Verbal Response No Polarity Reversal StasPolarity Reversal Protocol None ALTERNATE, +CLASS UN-OBTAINABLE Number Disconnect Codes Disconnect Code Reason Register Descriptions Definition Register Function Default Range Units DecimalRegisters Ascii All spaces 0s 2400 Symbols/second Symbol Rate Allowable Data Rates Register Address Name Description Default Hex DT4B1 U0FDT4A0 DT4B2 U2F U2EBmtt Bdlt U4F U4EPrdd FHT Sasf V9AGGSamco SC0 Bit-Mapped U-Register Summary Register Summary U0-U16 Dial Tone Registers Register Name Description Default2. U00-U16 Dial Tone Detect Filter Registers U17-U30 Busy Tone Detect Registers 3. U17-U30 Busy Tone Detect Filter Registers 300/480 310/510 Default Busy and Dial ToneBPF Biquad Stage Output Scalar 320/630 BPF Biquad Values 400/440 4. U31-U33 Ringback Cadence Registers Ringback Cadence RegistersDial Tone Timing Register 5. U34-U35 Dial Tone Timing Register Dtmf Dial Registers Pulse Dial Registers7. U46-U48 Dtmf Dial Registers 8. U49-U4C Ring Detect Registers Ring Detect Registers9. U4D Modem Control Register 1-MOD1 Register U4D Bit Map Loop Current Debounce Registers Pre-Dial Delay Timer RegisterFlash Hook Time Register Transmit Level Register U54 Bit Map U53 Bit MapU62 Bit Map U63 Bit Map U65 Bit Map PDL Line-Side Chip Power Down17. U67-U6A International Configuration Registers = Normal operation U66 Bit Map U67 Bit Map U68 Bit Map 18. U6C Line-Voltage Status Register U6A Bit MapU6C Bit Map 19. U6E-U7D Modem Control and Interface Registers U6F Bit Map U6E Bit MapPtmr U70 Bit Map U71 IO1 Bit D15 D14 D13 D12 D11 D10 Name Type Reset settings = BitDisables PCM mode Enables PCM mode Function 155 Reserved Read returns zero U76 Bit Map U77 Bit Map U78 Bit Map Monitor Mode ValuesU79 Bit Map = Normal Atdtw operation U7A Bit MapAdaptive Dialing Pin indicates valid ring signal Synchronous Mode= Normal asynchronous mode Given time = ATZ enabled = Disables No Loop Current Detect= Timed calibration disabled 20. U80 Transmit Delay for V.22 Fast Connect Minimal Transparency Special Error Reporting Mode= Ignore unrecognized in-band commands Framed Sub-Mode Startup Firmware Upgrades Load Technique and Speed Table Patch, 115 kbaud Uart Lines Reset, thenEscape Methods Method Th Bit Escape 1. +++ EscapeEscape Pin Escape Enabling Error Correction/Data Compression Error CorrectionWire Mode To Enable Use AT Commands Synchronous Mode Overview Legacy Synchronous DCE Mode/V.80 Synchronous Access Mode15. V.80 Mode Epos Electronic Point of Sale Applications Synchronous Access Mode Settings AT\N0 Indicator pair Code Transparent Submode Command Hex Supported Transmit Direction Receive DirectionCRC EM In-Band Commands and Statuses Supported Transmit Direction Receive Direction Fast Connect SettingsCommand Code Transparent Submode ATDT12345 Connect 1200 Protocol None 0x190x190x110x11 Programming Examples Modem Feature vs. Hardware, AT Command and Register SettingFunction/Feature AT Commands Registers Quick Reference DC Termination Country-Dependent SetupDC Termination Control Bits Reg Bit Val Function Country Initialization Table Country ConfigurationCountry Initialization Table Country Initialization AT+GCI=16 AT+GCI=AAT+GCI=F AT+GCI=9C AT+GCI=31 AT+GCI=26AT+GCI=27 AT+GCI=6C AT+GCI=3D AT+GCI=3CAT+GCI=42 AT+GCI=57 AT+GCI=46AT+GCI=53 AT+GCI=58 AT+GCI=61 AT+GCI=59AT+GCI=0 AT+GCI=9F AT+GCI=69 AT+GCI=7B AT+GCI=89 AT+GCI=7EAT+GCI=82 AT+GCI=87 AT+GCI=B8 AT+GCI=A0 AT+GCI=FE AT+GCI=A5AT+GCI=A6 UAE AT+GCI=B4 International Call Progress Registers Dial Registers Line Interface/Control Registers Blacklisting AT Command FunctionSpecial Requirements for Serbia and Montenegro S42 Blacklisting Caller ID Caller ID Modes Japan Caller ID SMS CommandsSMS Support Protocol 150 Character Description Hexadecimal Value Ascii Value Type II Caller ID/SAS DetectionMdmf Parameters Johndoe SAS Tone Frequency SAS Cadence for Supported Countries Australia Country Tone Frequency Hz Cadence seconds RegistersAruba Austria Cyprus Country Tone Frequency Hz Cadence seconds Registers ChinaCroatia Czech Republic Honduras GreeceGuyana Hong Kong 064 0.436 IsraelJapan Jordan Lao P.D.R KiribatiKorea Republic Lithuania Papua New Guinea NigeriaOman Paraguay St. Lucia Country Tone Frequency Hz Cadence seconds Registers RussiaSt.-Kitts-and-Nevis Saudi Arabia Trinidad SwedenTajikistan Tobago Line Not Present/In Use Indication Method 1-Fixed Intrusion/Parallel Phone DetectionOn-Hook Condition Loop Voltage Action Line Not Present/In Use Indication Method 2-Adaptive Off-Hook Condition Register Bits Name Function Intrusion DetectionATH1 Initiating Modem-On-Hold Possible Responses to Pmhr Command from Remote ModemModem-On-Hold Value Description Hdlc Bit Errors on a Noisy Line Receiving Modem-On-Hold Requests DCE Bit ErrorsBeginning of Packet Bit Errors Data Meaning 0D 0A 4E 4F 20 43 52 49 45 52 0D 0A Overcurrent Detection Overcurrent DetectionPulse/Tone Dial Decision Register Bit Value Function Automatic Phone Line Configuration Possible +PMHT Settings Telephone Voting Mode12. V.92 Quick Connect AT+PQC Parameters AT+PSS Parameters Handset, TAM, and Speakerphone Operation Extended AT+ Command SetSoftware Reference After ring only Command Action Caller ID TypeCaller ID Enable Distinctive Ring Cadence Reporting Command Action Analog Source / Destination Selection +VTS command. Default time is 1 second dur = Command Action Ringing Tone Never Appeared TimerSpeakerphone AEC, AES and LEC disabled. Handset FIR filter Compression Selection Method Command Action Dtmf and Tone Generation Transmit Voice Stream Code Hex Simple Action Command Description DLE Commands DTE-to-DCEDLE Commands DTE-to-DCE Format DLECode Code Hex Description DLE Simple Events DCE-to-DTEDLE Events DCE-to-DTE Simple Event Reporting SUB 180 Complex Event Reporting Voice Mode U Registers AddressDescription Default Format DLEXResponseDLE Description Voice Mode U Registers Register Address Name Description Default HRXFIR3 HRXFIR1HRXFIR2 HRXFIR4 STXFIR3 STXFIR1STXFIR2 STXFIR4 SRXFIR3 SRXFIR1SRXFIR2 SRXFIR4 U19E U199 Bit Definitions Voice Reference-Overview TAM, Handset, and Speakerphone Voice Paths Rev 189 Voice Mode Operations +FCLASS=8 +VTX +VRX +VSP +VTS DTR off &D2 Input Current Modem Settings Command orEvent +VNH = ATH or ATZ or Si3000 Configuration System Voice Modes TAM Pstn Initialization Initialization Sequence Rev 195 Handset Handset ConfigurationOverview AT+VLS=13 AT+VLS=0AT+VSP=0 Handset Manual Off-Hook Dial Handset Automatic Tone DialHandset Automatic Pulse Dial Terminate Handset to TAM Hands-Free TransitionAT+VLS=14 Speakerphone Transition Handset to Speakerphone TransitionAT+VSP=1 Local Ring Notification with Type I CID Event Telephone Answering MachineNAME=JONES Jennifer ATU199&FFFD TAM Hands-Free Record OGMRecord OGM AT+VRX Connect Record Local ICM TAM Hands-Free Review OGMReview OGM Review ICM TAM Handset Record OGM Trigger receive operation. The first byte TAM Handset Review OGM AT+VSM=4 TAM Pstn Normal Answer OGM Playback with ICM Record Normal Answer OGM Playback with ICM Record AT+VLS=15 ICM Interrupted Answer OGM Playback with Dtmf Menu Entry DLE1 Dtmf 1 digit detected Speakerphone Simplex Speakerphone Simplex Speakerphone U Registers Register Name Description Default ValueTransmit Gain Calibration-Speakerphone Disabled External Microphone/Speaker Calibration Transmit Gain Configuration Transmit/Receive Gain Calibration Dial Remote Telephone AT+FCLASS=8 Receive Gain Configuration Receive Gain Reference Measurements Speakerphone Calibration-AEC Gain Calibration Reg Name Bit U19E AEC Gain Calibration Dial Remote Telephone Speakerphone Configuration Speakerphone Configuration Simplex Speakerphone Configuration Speakerphone Manual Off-Hook Dial Simplex Speakerphone ConfigurationSpeakerphone Automatic Tone Dial Call-Automatic Tone Dial Speakerphone to Handset Transition Speakerphone Automatic Pulse DialCall-Automatic Pulse Dial References GlossaryTermination Security Protocols Implementing the SIA Protocol Considerations when Disconnecting the Session AT+F0 AT+F3 AT+F1AT+F2 AT+F4 Result Code Meaning Remarks Implementing the Ademco Contact ID Protocol Modem Specific Implementation Details Ademco Contact ID Protocol Tone Transmission AT CommandsDtmf Digit Low Tone Hz High Tone Hz Contact ID AT Command Kissoff Handshake Tone Detection Ademco Mode of OperationStep DTE-to-Modem Command Modem-to-DTE Remarks Indication Event Modem-to-DTE indication Remarks Wait for Receiver to answer with handshake tones Delay 250 ms before transmitting Data TonesMessage Wait for Kissoff tone ATH Rev 233 Chinese ePOS SMS SMS Message Format AT Command ISOmodem Response Description SMS AT Command SetAT Commands for SMS +FCLASS=256 User Registers for SMS Operations Register Bits Name Description Default Hex= Auto Mode SMS User Registers Example ProcedureCrlfconnect Crlf Connect 1CRLF ResponseDleetxcrlfno Carriercrlf Connect 2CRLF Example Session Dleetxcrlfokcrlf POS SMS Process in Host and Modem Testing and Diagnostics Prototype Bring-Up Si3018/10  Register Configurations  Inappropriate Commands Command Timing Host Interface Troubleshooting Component Troubleshooting Isolation Capacitor Troubleshooting10.1.6. Si3018/10 Troubleshooting  Connect Evaluation Board to Prototype System Test the Host Interface EVB Test the Prototype Si3018/10 Circuitry Si3018/10 Typical Voltages Resistance to Si3018/10 Pin Si3018/10 Resistance FB1 FB2 RV1 Resistance across ComponentsVoltages across Components with Diode Checker Component Voltage Self Test Loop Test Circuit Board Test Bell 103-V.34 Modem Functional Test Connection Modem Under Test Teltone ILSIsdn Modem Test Coverage AT Commands for Compliance Testing Compliance TestingAT Command/Test Method Desired Response 29 Data Rate Symbol/Data RateS41 Symbol Rate Allowable Data Rates Transmit Modulation Data Rate Safety Surges AM-Band Interference Published Coilcraft TRF-RJ11 Filter Performance Debugging the DTE interface Debugging the DTE Interface Appendix A-EPOS Applications Modulation Recommendation 0xFF 0x19 0xA0 0x19 0xB1 ISOmodem in Epos Applications ISOmodem V.80 Protocol Hdlc Framing in Framed Sub-Mode AT&D2 Setup procedure29 FastPOS Sample Program AT+FCLASS=1 How to use the program Example Program in C/C++ Rev 263 264 Rev 265 True Rev 267 = Rtscontrolenable Rev 269 270 RTS not RTS signal FastPOS Detailed Wave Files FastPOS DTE Trace Times When Audio Recording May Not Help When to Use Audio RecordingHardware Setup Setting PC Microphone Input for Recording Windows NT Larger of the two jacks 3.5 mm carries audio to the PC Setting PC Microphone Input for Recording Windows Sounds and Multimedia Properties Setting PC Microphone Input for Recording Windows XP Multimedia Properties Sounds and Audio Devices Properties Making the Recording with Adobe Audition or WaveSurfer Sound Recorder Audio Playback and Analysis Adobe Audition Temporal View of a Good V.22 Transaction Adobe Audition Spectral View of a Good V.22 Transaction Band Spectral Display Audio-Recording Pitfalls Recording Made at Excessive Level Details of Some Low-Speed Protocols Appearance of Bell 212 Protocol Appearance of V.22 bis Protocol Appearance of V.29 FastPOS Protocol Examples of Epos Server Misbehavior Example of Epos Server Misbehavior Examples of Line Impairments Dtmf Distorted by Low Line Level Power Line Related Noise Appendix C-PARALLEL/SPI Interface Software Implementation MCU Software Description Hardware Access LayerInterrupt Service and Polling Layer  MCUhardware.c  modemhardware.c Polling HIR1 Method Interrupt Service Routine ISR MethodRXF Interrupt Receive Fifo Almost Full TXE Interrupt Transmit Fifo Almost Empty Timer Interrupt Receive Fifo Not EmptyU70 Interrupt Parallel- or SPI-Port Interrupt-Service Flowchart Buffer Management, Status and Control Layer Buffer Management Circular-Buffer Flowchart Application Layer Sample Application Status and Control Making a Connection Compiler Option Dot CommandsModem Operation Data Bursts Modem Interrupt Service Sample Code Sfrpagesave = Sfrpage Rev 301 302 Revision 0.7 to Revision Revision 0.5 to RevisionRevision 0.6 to Revision Revision 0.8 to Revision Contact Information