Intel 537EX Sending Commands, DTE-Modem Data Rate Response Codes, Numeric Text, Delayed Call

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Introduction

1.4.1Sending Commands

All command lines sent to the modem, except for A/, must be preceded by an ‘AT’ and terminated by the contents of S-register S3 (typically a carriage return <CR>). AT stands for ‘attention’ and prompts the modem to receive a command line from the DTE. A <CR> informs the modem that the entire command string has been transmitted and to begin processing all the commands in the command line. A command line can include one or more AT commands. The commands can be separated by a space, if desired, but no punctuation is needed except for extended commands. Extended commands begin with a ‘+’, such as fax, voice, and V.250 commands. In a multiple- command line, extended AT commands must be separated from following commands by a semicolon(;).

Examples:

ATS1?<CR>

A/

AT &F &D2 +FCLASS=?<CR>

AT +FCLASS=0; S0=1<CR>

The modem provides status information to the DTE in the form of response codes, as listed in Table 4. Response codes take two (2) forms, text (ATV1) or numeric (ATV0), depending on how the modem is configured.

Table 4 lists basic format response codes. These response codes have numeric equivalents that are displayed depending on the value of ATV. In addition to the basic format response codes, there are extended syntax result codes that indicate connection status of the DCE-DCE connection that are not effected by numeric response reporting. These result codes have no numeric equivalent and are always issued in text form. The result codes display modem mode, transmit connection rate, error correction, compression, DTE rate, and receive rate. Note that the final connection message only indicates receive rate if ATXn is greater than 0. The format for the result codes code depends on the Wn command. The setting of the Wn command will determine which of the following connect results codes are displayed (+MCR, +MRR, +ER, +DR, +ILRR). Refer to the Wn command for the detailed description of the command. Note that the supported carrier modes for +MCR can be found in parameter 1 of +MS. The last result code is the CONNECT <text>, where text is the DCE receive rate. Note, the CONNECT <text> is not displayed when ATX0 is indicated, just CONNECT is displayed and is reported by the rules in Table 4.

Table 4. DTE-Modem Data Rate Response Codes

Numeric

Text

 

Numeric

Text

 

 

 

 

 

0

OK

9

 

DELAYED CALL

 

 

 

 

 

1

CONNECT

10

 

BLACKLISTED

 

 

 

 

 

2

RING

11

 

+FCERROR

 

 

 

 

 

3

NO CARRIER

12

 

RINGBACK

 

 

 

 

 

4

ERROR

13

 

CPON=

 

 

 

 

 

6

NO DIALTONE

14

 

CPOF=

 

 

 

 

 

7

BUSY

15

 

DRON=

 

 

 

 

 

8

NO ANSWER

16

 

DROF=

 

 

 

 

 

After sending an AT command string to the modem, the DTE must wait for a response code from the modem before sending a new AT command string to the modem.

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536EX Chipset Developer’s Manual

Intel Confidential

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Contents 537EX Chipset Developer’s ManualIntel Confidential Contents Figures Tables Revision History Date Revision Description001 Initial release Introduction Controllerless Modem Driver OverviewWindows 95 and Windows V.90/V.92 and V.34 Data Modes Tapi Unimodem Intelsdb.VXDModem Connection Overview AT Commands Overview DTE-to-DCE Data Rates for Each ModeDCE-to-DCE Data Rates for Each Mode DCE-to-ISP Data Rates for V.90 ModeSending Commands Delayed CallDTE-Modem Data Rate Response Codes Numeric TextCommand Function AT Escape SequencesDial Modifier Dialing digitsData Mode Command Summary Command Function Default Range Reported By &VnIntel Confidential Intel Confidential Intel Confidential +EB +ESA+ESR +ETBM44/V.42/V.42 bis MNP Command Summary Processes flow control characters and passes to local Fax Identity Command Summary Fax Class 1 Command SummaryIS-101 Voice Command Summary Voice DTE→DCE Character PairsResponse Hex Code Function Voice DTE →DCE Character Pairs Voice DTE←DCE Character PairsDEL ESCRegister Function Default Range Units Reported by &Vn Dial ModifiersRegister Summary AsciiRegister 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 Supported Modulation Types Carrier DescriptionDiagnostic Testing S18, &Tn Local Analog Loopback AT&T1Local Analog Loopback With Self-Test AT&T8 Local Modem or Test ModemAT Escape Sequences Time-Independent Escape SequenceLicensing Requirements for Hayes Escape Sequence Example Data Mode Command Descriptions Command Default DescriptionHayes* Escape Sequence Previously stored in the Nvram with the AT&Zn=x command Host in either online or off-line command modeEcho disabled Echo enabledATI2 DTESn=x Command Modem dials a telephone number touch tone dialingNumeric or verbose form Numeric formDisconnecting Subsequent commands to be ignoredResets the modem and recalls user profile DCD or Rlsd signalAT&V0 Active ProfileStored Profile Telephone NumbersS-register configurations into the Nvram user profile ‘n’ Command to see the stored telephone numberSelect profile = 0-9 a B C D # * T P R W @Command Default Indication Definition+EB CRC generation and checking disabled Nrzi encoding and decoding disabledSecondary channel operation, and vice versa 12/V.34+ESR +ETBM+GMR +GSN+IFC +ILRR=m+MS command description +MA? will display a list of enabled alternative modulations= carrier,carrier,…carrier If +MS = ,0,, no alternative modulations will be availableCarrier Description BELL103BELL212 +MS=m See ‘m’+PHSW= +PMHFValue Description +PMHRConjunction with the +PSS command Enable Short Phase 1 and Short PhaseEnable Short Phase Disable short Phase 1 and Short PhaseMode Features Operating Modes44/V.42/V.42 bis and MNP Data Modem Command Descriptions +ES Settings Answer ModemResulting +ES Connection Types +ES=1, 0 +ES=4, 4 +ES=3, 0 +ES=3, 2\Bn \Kn +DR=m Direction+DS=m Max string3768 +EFCS=mDisplay messages when +ER = Decimal value and the format is as follows+ER=m +ER LapmSetting is ignored if origrqst=6 Control during non-error control operationNon-error control operation +ES=mFax Identity Commands Fax Class 1 CommandsFax Identity Command Descriptions +FMFR?/+FMIMod Selection Table Value Modulation Speed bps30 Hdlc Frame Format Class 1 DTE-Generated Hdlc Frame Information AT+FTH=modFax Mode Command Descriptions +FCLASS?+FCLASS +FRH=m +FRS=m+FTH=m IS-101 Voice Mode AT Commands Voice Mode Command Descriptions Dtmf Detection ReportingRelay Control +FLO=m Enable report Function +VDR=m See ‘m’Defaults = ‘C’, BB860980, BFE63883, BB863EE0 Caller ID report Command Reserved Distinctive ringing AllEvent Description +VEM=m See ‘m’EIGHT-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 +VRX +VSD=m See ‘m’+VSM=? command to obtain supported sampling rates 141 AD3 3-bit Adaptive differential pulse code modulation+VSM=m Range 4800, 7200, 8000, and 11025 samples/secondCml SerialHard Disk CompressionFactory default is ‘0’ 100 Default value 1 second100 Range 5-255 units of 0.01 secondsDual tones may be sent using the following format +VTS=m NoneSpecified by +VTD=m This sends a 500 ms period of silenceCommand Default Description Register Command Descriptions S10 Range Seconds Default 0 seconds Escape sequencesS16 S21 S22 118S25 S30Modem exits sleep mode whenever the host reads or writes to Modem or when a ring signal is detectedSleep mode is disabled by setting S33 to ‘0’ Inactive state whenCaller ID Tags for Formatted Reporting Tag DescriptionRing Uart Emulation in the Controllerless Modem Uart Emulation in Intelsdb.VxDUart THRRBR Parallel Host Interface Uart Register Bit Assignments Uart Register Definitions Scratch Register SCRModem Status Register MSR Bit Framing error OE Overrun Error-Not supportedLine Status Register LSR StackIER Interrupt Enable register Procedure is as followsModem Control Register MCR Line Control Register LCRFifo Control Register FCR BitInterrupt Identity Register IIR Interrupt Control FunctionsID1 ID0 Interrupt Enable Register IER ID bit 2 for Fifo modeTransmitter Holding Register THR Dlab =Receiver Buffer Register RBR Divisor Latch Registers DLM and DLLProgrammable Data Rates Data Rate Divisor Number Divisor Latch HexFifo Interrupt Mode Operation Fifo Polled Mode Operation16C550A Uart Fifo Operation 102536EX Chipset Developer’s Manual 103
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