Intel 537EX manual +Vrx, +VSD=m See ‘m’

Page 79

IS-101 Voice Mode AT Commands

Table 25. Voice Mode Command Descriptions (Continued)

Command

Default

Description

 

 

 

 

 

Record Mode: This command causes the modem to enter record mode to record voice messages.

 

 

Upon receiving the AT+VRX command, the modem responds to the DTE with a ‘CONNECT’ message

 

 

at the current DTE-to-modem rate. It is important that the UART DTE-to-modem rate be equal or

 

 

higher to the compression-scheme-required UART data rate (for example, CL1 at 4800 samples/

 

 

second requires 57,600 bps). If the DTE-to-modem data rate is lower than the compression-scheme-

 

 

required UART data rate, then data may be lost or may be garbled during playback of the message.

 

 

After sending the ‘CONNECT’ message, the modem then sends digitized voice data that is <DLE>-

 

 

shielded to the DTE. The modem buffers the data to ensure steady voice delivery even though the

 

 

voice data may be transferred to the DTE in bursts. The DTE may use the <DLE><NUL> shielded code

 

 

as a no-operation command to refresh the inactivity timer.

 

 

During voice receive mode, the modem informs the DTE about pertinent events that may prompt the

 

 

DTE to terminate the voice receive state. The DCE sends <DLE> codes for detection of signals such as

 

 

busy tone, dial tone, DTMF tone, and codes for ‘Presumed End of Message’ or ‘Presumed Hang-up.’

 

 

Record mode is terminated whenever the modem issues a <DLE><ESC> command or provides a DTE/

+VRX

none

DCE inactivity timer time-out. Upon detecting the terminating character, the modem stops sampling the

analog data. The modem then terminates record mode by sending the remaining voice data stored in

 

 

 

 

its internal buffer, <DLE><ETX>, and an ‘OK’ message to the DTE.

 

 

In some situations, the application software may want to abort record mode and immediately perform a

 

 

new function without first reading all the recorded voice data from the modem’s internal buffer (for

 

 

example, after detecting fax calling tone). This is accomplished by sending <DLE><!> to the modem

 

 

while in record mode. Upon seeing <DLE><!>, the modem terminates record mode, clears the

 

 

modem’s internal record buffer, and issues a <DLE><ETX> to the DTE followed by an ‘OK’ message.

 

 

The modem may immediately abort record mode if it receives either an AT+VIT=m time-out or a DTR

 

 

toggle. If +VIT≠0 and the modem has not received any data or a <DLE><NUL> code before the +VIT

 

 

timer times out, then the modem immediately aborts record mode. The modem then hangs up the line

 

 

and changes to data mode (+FCLASS=0). If the UART DTR signal is toggled on-off-on, then the

 

 

modem follows the &Dn setting. If configured for &D2 or &D3, the modem immediately aborts record

 

 

mode, hangs up the line, and changes to data mode (+FCLASS=0).

 

 

NOTE: The voice sampling rate and sampling mode must be the same values as used during record

 

 

mode.

 

 

 

 

 

Silence Detection (Quiet and Silence): This command allows the DTE to set two parameters: <sds>

 

 

reports the sensitivity for silence detection, and <sdi> reports the length of silence required for the

 

 

DCE to report silence when receiving voice.

 

 

The <DLE><s> silence timer starts immediately after entering record mode. The modem stops using

 

 

the <DLE><s> timer and starts using the <DLE><q> timer if:

•the <DLE><s> silence timer has timed out and a <DLE><s> code has been sent to the DTE, or

•if noise or voice energy has been detected above the silence detection threshold (as defined by <sds>).

 

 

m = <sds>, <sdi>

+VSD=m

see ‘m’

Defaults: m = 128, 50

<sds> Silence Sensitivity: If the received analog signal stays below this specified level for a user-

 

 

 

 

specified time delay, the modem sends <DLE><q> to the DTE. The modem sends only one <DLE><q>

 

 

to the DTE each time record mode +VRX is entered.

 

 

Range: 121–131

 

 

128*

Nominal level

 

 

<sdi> Length of Silence: This parameter sets the period of silence that must elapse before the DCE

 

 

reports silence (as detected by ‘Quiet’ or ‘Silence’).

 

 

Range: 0–255 (units of 0.1 second)

 

 

0

Silence detection disabled

 

 

50*

Silence detection enabled

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

536EX Chipset Developer’s Manual

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Intel Confidential

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Contents Developer’s Manual 537EX ChipsetIntel Confidential Contents Figures Tables Date Revision Description Revision History001 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 SummaryVoice DTE→DCE Character Pairs IS-101 Voice Command SummaryResponse 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 Modem Responses and Command Echo En, Vn, Xn, Wn, Qn Using AT Commands to Access the S-Registers Sn?, Sn=x, ?Modem Setup Host Modem Response Command Data Reporting Wn Mapping Disable EnableDTE Resets and then configures the modem to Nvram user profile Establishing a Modem Connection A, D, DS = n, S0 AT Commands Product InformationProduct Identification Information Hanging Up Hn, S10, Zn, &D2 Online Command Mode Escape Codes, OnModem-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&T8Time-Independent Escape Sequence AT Escape SequencesLicensing Requirements for Hayes Escape Sequence Example Command Default Description Data Mode Command DescriptionsHayes* Escape Sequence Echo enabled Previously stored in the Nvram with the AT&Zn=x commandHost in either online or off-line command mode Echo disabledDTE ATI2Sn=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=mDirection +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 Format+FCLASS? Fax Mode Command Descriptions+FCLASS +FRS=m +FRH=m+FTH=m IS-101 Voice Mode AT Commands Dtmf Detection Reporting Voice Mode Command DescriptionsRelay 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 DescriptionEX Value BIT Value Event EIGHT-DIGIT HEX Code B B 8 6 3 E EHEX Digit Location 128 Nominal transmit level Local telephone, or speaker+VIP Label Preassigned Voice I/O Labels+VLS=m Relay/Playback Control Voice I/O Primitive CodesPrimitive 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 Escape sequences Range Seconds Default 0 secondsS16 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 ModemTHR UartRBR Parallel Host Interface Uart Register Bit Assignments Scratch Register SCR Uart Register DefinitionsModem 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 Control Functions Interrupt Identity Register IIRID1 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

537EX specifications

The Intel 537EX is a powerful and innovative embedded processor designed for a range of applications, particularly in the fields of industrial automation, telecommunications, and transport management systems. This processor is a member of Intel's embedded product line, tailored specifically to meet the demands of systems that require high reliability and long lifecycle support.

One of the main features of the Intel 537EX is its multi-core architecture, which enables efficient parallel processing capabilities. This allows for the execution of multiple tasks simultaneously, significantly improving overall system performance. The processor also incorporates Intel’s advanced power management technology, which ensures that the device consumes energy efficiently, enhances thermal performance, and prolongs the lifespan of the system.

The Intel 537EX supports a range of connectivity options, including high-speed Ethernet and Serial ATA interfaces. This ensures that it can easily integrate into existing systems, seamlessly supporting applications that require robust data transfer capabilities. Additionally, the processor is equipped with multiple I/O ports, facilitating the connection of various peripherals and sensors, which is crucial in industrial applications.

One of the standout technologies within the Intel 537EX is its support for hardware virtualization. This feature allows for the creation of multiple virtual environments within a single physical structure, optimizing resource utilization and enhancing system flexibility. Additionally, Intel’s integrated security technologies provide a significant layer of protection against potential threats, ensuring that embedded systems remain secure.

Another characteristic of the Intel 537EX is its extensive software support, which includes compatibility with various operating systems and development environments. This versatility makes it an attractive choice for developers looking to build or upgrade their embedded systems. With access to Intel's comprehensive software tools, developers can quickly optimize applications to take full advantage of the processor's capabilities.

The Intel 537EX also boasts excellent thermal performance, allowing it to operate efficiently in harsh environments. This is crucial for embedded applications in industrial settings where temperature fluctuations are common. Overall, the Intel 537EX is engineered to deliver high-performance processing power, superior connectivity, and enhanced security, solidifying its position as a reliable choice for demanding embedded applications.
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