= sds, sdi Defaults m = 128, +VSD=m See ‘m’ | Intel MD566X specs

56K V.92 Data, Fax, and Voice Chipset

Table 6-1. Voice Mode Command Descriptions (Continued)

Silence Detection (Quiet and Silence): This command allows the DTE to set

two parameters: <sds> reports the sensitivity for silence detection, and <sdi> re- ports 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> Defaults: m = 128, 50

+VSD=m	see ‘m’	<sds> Silence Sensitivity: If the received analog signal stays below this speci-

		fied 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.
		<sds> = 121–131
		n = 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”).

<sdi> = 0–255 (units of 0.1 second)

n = 0

Silence detection disabled

n = 50* Silence detection enabled

Programmer’s Guide

Intel Confidential

93

Image 93

Intel MD566X manual = sds, sdi Defaults m = 128, +VSD=m See ‘m’

Contents

MD566X Revision History Conventions Symbol Units of measureProgrammer’s Guide Acronym Definition Dram Chipset Contents Qty IntroductionIntel V.90/V.92 56K Chipsets Modem Connection Overview V.92, V.90 and V.34 Data Modes DTE-to-DCE Data Rates for Each Mode DCE-to-DCE Data Rates for Each ModeMode Data Rate bps Affected Data AT Command Summary Tables Data Mode Command SummaryCommand Function Default Range Reported by Intel Confidential Data rate Result code type Yes Ports only Async mode +GMI? Intel Confidential Command Function Default Range Reported By &Vn V.44 / V.42 / V.42 bis MNP∗ Command Summary Intel Confidential Value saved in Nvram Fax Identity Command Summary Fax Class 1 Command SummaryIS-101 Voice Command Summary Response Hex Code Function Voice DTE→DCE Character Pairs Voice DTE←DCE Character Pairs Dial Modifiers Command Function Register Function Default Range Units Reported By &VnS-Register Summary Verbose Code Numeric Code 10. V.90/V.92 Mode DCE-to-ISP Response Codes 12. DTE-to-DCE Data Rate Response Codes 11. V.34 Mode DCE-to-DCE Response Codes Command Function Default Range 13. Manufacturing-Only Command Summary a Using AT Commands to Access the S-Registers Sn?, Sn=x, ? Basic Data Mode AT CommandsModem Responses and Command Echo En, Vn, Xn, Wn, Qn Modem Setup Host Command Modem Response Example of a Remote Connection Information Product Identification Information Establishing a Modem Connection A, D, DS = n, S0 Online Command Mode Escape Codes, On Hanging Up Hn, S10, Zn, &D2Modem-to-Modem Connection Data Rates Intel Confidential Intel Confidential ATH +PMHF +PMHR Carrier Description Supported Modulation Types S37 +MS = carrier , automode, min rate, max rate Figured to attempt only a 28,800 bps connec Originating Answering Resulting Connection Speed Modem Local Analog Loopback AT&T1 Diagnostic Testing S18, &Tn AT&T0 Local Analog Loopback with Self-Test Local Analog Loopback With Self-Test AT&T8 AT Escape Sequences Licensing Requirements for Hayes Escape SequenceTime-Independent Escape Sequence Hayes∗ Escape Sequence Data Mode Command Descriptions Command Default DescriptionNone Stant carrier mode Dialing Digits Online data mode echo Reports product code ATI5 Cont Mode from online command mode Sn? Sn=x Protocol Lapm Sequent commands to be ignored For data mode Ports asynchronous mode. This command is the same as &M0 User profile n Zn=x None Modem power-up +GMR? V34BS +MS=m See m Cont Modulation Selection Examples DTE data rate = 115,200 bps +MS=mExamples DTE data rate = 2400 bps +PMH=m +PCW=m DCE +PMHR none Mand +PSS=m Intel Confidential Mode Features Error Correction and Data Compression Resulting \Nn Connection Types Bis with fallback to MNP5 \N3 \Bn None \An \Cn \Gn\Jn \Nn \Kn \Qn \Tn\Xn Intel Confidential 0,471 +DS44=m 972,140140,1884 3768 Fax Identity Commands FAX Class 1 AT CommandsFax Identity Command Descriptions Tocols +FREV?/+FMR? none Fax Class 1 Commands Value Modulation Speed Bps Mod Selection Table Class 1 DTE-Generated Hdlc Frame Information AT+FTH=mod +FCLASS=1 Fax Mode Command Descriptions +FRH=n Command Default Description Receive Hdlc Data+FRM=n None +FRS=n None DTE after receiving the +FTH=mod command Data using the modulation selected in mod Each command may be used as follows IS-101 Voice Mode AT Commands Relay Control Dtmf Detection +FLO=n Voice Mode Command Descriptions +VCID=n +VBT=m Enable Report Function +VDR=m+VEM=m See m Dialtone +VEM=m Example 3. Reading the Event Mask Settings Example 2. Setting the Event MaskEvent Reporting and Masking Example 1. Viewing Supported Events +VGR=n 128 +VGM=n 128+VGS=n +VGT=n +VIP none +VLS=n Code Relay/Playback Control Primitive Code +VLS=n+VNH=n Intel Confidential +VRX none +VSD=m See ‘m’ = sds, sdi Defaults m = 128 Vsr Comments Samples/second Manufac +VSM=m turer- specified +VSM=m Manufac Compression Method SelectionVsr Hard Disk +VTD=n 100 +VSP=n +VTS=m none AT+VTS=DTMF or Dtmf and Tone Generation AT+VTS= , ,duration For example AT+VTS= , ,50 Intel Confidential Registers S-Register Command Descriptions Ascii decimal S10 S11S12 S16 S14 138 S22 118 S21 S27 S23 None S31 S33 Maximum Line Speed Attempted 110 Caller ID Tags for Formatted Reporting Caller ID Ring MANUFACTURING-ONLY Commands Manufacturing-Only Command DescriptionsNCnn S92 S91 $TTnn FAX Test Tone Test Command Analog Loopback ALB Test #VGP0=n Command Bit Pins#VGP1=n See Note #VGP2=n 118 Parallel Host Interface 16C450/16C550A Uart Programmer’s Guide119 Register BIT Number Address Name Parallel Host Interface Uart Register Bit Assignments Scratch Register SCR Uart Register DefinitionsModem Status Register MSR Line Status Register LSR Modem Control Register MCR Are no subsequent Fifo errors 123 Line Control Register LCR Trigger Level Bytes Fifo Control Register FCR Interrupt Identity Register IIR Interrupt Control Functions125 Interrupt Enable Register IER Transmitter Holding Register THR10.1.10Receiver Buffer Register RBR 10.2 16C550A Uart Fifo Operation Fifo Interrupt Mode Operation10.1.11Divisor Latch Registers DLM and DLL Programmable Data Rates Fifo Polled Mode Operation 129 130