Conexant CX11252-11 Modem
Contents
1. e Telephony remote TAM V 253 commands 8 bit u Law A Law ing G 711 8 bit 16 bit linear coding 8kHz sample fate N Concurrent DTMF detect ring detect and caller ID detect e V 80 synchronous access mode supports host controlled communication protocols with H 324 interface support V 8 V 8bis and V 51 commands e Data Fax call discrimination e Internal circuits eliminate external components EEPROM 5 Vto 3 3V voltage regulator A 35V PCI 3 3V and Vaux 3 3V power switching circuit Ringwake eliminating external diode resistor capacitor circuit RD Worl dwide operation including U S Japan Canada Complies to requirements of TBR21 and all other countries Caller ID detection Call progress blacklisting 1 4 Conexant 101309C CX11252 HSFi Modem Data Sheet 1 2 1 Applications Lm Single configuration profile stored in host Modem and audio paths concurrent across PCI Bus System compatibility Windows 95 98 operating system on an MMX 200 MHz based ps with 32 MB RAM or equivalent Re Windows 98SE ME 2000 operating system on a MMX 200 MHz b ed computer with 64 MB RAM or equivalent Microsoft s PC 2001 Design Initiative compliant Unimodem V compliant 7 Linux Kernel 2 2 16 2 2 17 and 2 4 Operates from 5 V PCI 43 3 V PCI 3 3 V Vaux Automatic PCI 5 V PCI 3 3 V or Vaux internal sies2. 3 Call Progress Tone Detection EE 2 1 4 Answer EN aM E 215 Ring Detection iy 2 1 6 ret 21 7 2 1 8 mode 22 Data Mone n 2 2 1 Speed BufferingANorimal 22 cie rrt e a cb ee 2 2 2 2 22 3 Escape Sequence Detection ennt nnne 2 2 224 GSTN Cleardown V 92 V 90 K56flex V 34 V 32 bis V 32 e 2 2 2 2 5 Fall Forward Fallback V 92 V 90 K56tlex V 34 V 32 15 32 2 2 2 2 6 tet eA a eu Urt Adee tie PE E RU ERE 2 3 2 3 2 5250 DUE mama rest Geren E 2 3 101309 Conexant iii CX11252 HSFi Modem Data Sheet 24 2 5 2 6 2 7 2 8 2 9 2 10 Error Correction and Data COMpreSSiOn csssssssssssssssssscssssssssssessssscsssescseesssssssssecsvsesesessessssscasssesessacasseseesessesesacas V 44 Data COmpFeSSiOT ie er e ecc e ed Ae e e dte odd ack VAZ Error GOFEBCHOTU aec oot itte tc rente lee tec ted tete a eei ted MNP 2 4 Error Correction V 42 bis Data Compression 5 Data Compression Fax Class 1 and Fax Class 1 0 Operation sse MOG0 c ccccccesceccsccsscsecscescsscsessscsecsecsecseesssacsscsecsesaesaesaeseesessassassesaesaucaecsecaesaesaees 2 6 1 Online Voice Command Mode 22000010 0 00 2000 2
3. 6 2 VOICE Receive Mode ettet ttg e de red 2 6 3 Voice Transmit Mode Caller 1D es Multiple Country Support 2 8 1 OEM Programmable Parameters 2 8 2 Blacklist Parameters tnnt nnn nnnm nnns ann M 2 9 1 Commanded Tests Low Power Sleep Mode sse Conexant 101309C CX11252 HSFi Modem Data Sheet Figures Figure 1 1 CX11252 HSFi Modem Simplified Interface Figure 1 2 11252 HSFi Modem Major Interfaces sssssseeeenne Figure 3 1 CX11252 Hardware Interface Signals Figure 3 2 11252 100 pin TQFP Pin Signals Figure 3 3 Waveforms Serial EEPROM Interface Figure 4 1 100 Pin TQFP 5 1 2 2 4204 2 0 00000000000000000000000000044 Tables Table 1 1 Modem Models and Functions DC E vi 1 3 Table 3 1 11252 100 TQFP Pin 10 5 amp eene nnne nnns 3 4 T ble 3 2 0X11252 Pin Signal Definitions rari ti ne e tee Dc eet e nee dead 3 5 Table 3 3 CX11252 1 0 Type Definitions Ll esses nnnm enne 3 8 Table 3 4 CX11252 DC Electrical Characteristics hi cient i en ieee 3 9 Table 3 5 Operating Conditions LE end 3 10 Table 3 6 Absolute Maximum Ratings Table 3 7 Current and Power Requirem nts 7 5 essent nnne
4. im toning 5 V operation or 43 3 V operation with 5 V tolerant DOM inputs 3 3 V analog operation 32 bit PCI Local Bus interface Compliant with PCI Local Bus BEY 2 2 and Mini PCI Specification Draft 1 0 gt PCI Bus Mastering interface 33 MHz PCI clock support ACPI Power Management Registers support PME support CX11252 packaged in s PCI plug in garal N j Embedded System boards 101309C Conexant 1 5 CX11252 HSFi Modem Data Sheet 1 3 Technical Overview 1 3 1 General Description The CX11252 provides the processing core for a complete modem system desi featuring data fax remote TAM modem Modem operation including progress telephone line interface and host interface functions d papper sand controlled through the command set Modem operation including dialing call progress telephone lise telephone handset interface voice speakerphone interface and host interface functions are supported and controlled through the V 250 V 251 and V 253 compatible command set The modem hardware connects to the host processor via a PCI or Mini PCI interface The OEM adds a crystal circuit and standard DAA circuit to complete the system 1 3 2 Host Modem Software The host modem software performs the foll ving tas 1 General modem control whicl tudes comma d sets fax Class 1 and 1 0 remote voic
5. neni Table 3 8 Timing Serial EEPROM Interfaces cccccccscscsccscsecscsesecsesecsesecsssesecsesecsesascaesesassasacsesecsesacaesecsssacacseeeeses 3 12 Table 3 9 Crystal Specifications lt gt EE E A EAEE E aides AA 3 14 Fable 5 1 EEPROM Data Location sess e enmt E 5 1 Table 5 2 Conexant Device ID and Subsystem Device ID Values 5 2 101309C Conexant CX11252 HSFi Modem Data Sheet Revision History Changes Incorporated in Doc No 101309C 1 Figure 4 1 Replaced with correct dimension drawing Changes Incorporated in Doc No 101309B 2 Throughout Deleted SmartDA A models and interface _ 3 Section 1 1 Added V 92 and V 44 introductory text 4 Table 1 1 Revised ordering information 5 Section 1 2 Added V 92 V 44 and Caller ID feature dnd od update system compatibility oe 22 6 Section 1 3 3 Added V 92 and V A4 information 4 7 Section 2 5 Added section with modem on hold information 8 Section 2 4 Added V 44 information 9 Section 3 5 Crystal MS M AP 10 11 12 Section 4 Added Conexant 101309C CX11252 HSFi Modem Data Sheet 1 Introduction 1 1 Overview The Conexant CX11252 HSFi Host Processed V 92 V 90 K S fiex supports V 92 and V 90 analog data modem operation with V 44 data compression and supports 14 4 kbps fax modem operation In addition the modem support
6. protocols e g H 324 video conferencing applications Voice call first WEED before eee to a videophone call is also supported Internal Switchini Circuit 7 An internal power switching circuit detects and selects operation from one of three power sources PCI 5 V PCI 13 3 V or Vaux 3 3 V which may be available in different combinations to a modem from a PC in the retail and OEM markets The combinations supported are PCI 3 3 V PCI 5 Vaux 3 3 V Device Power Source 0 0 0 1 Vaux 3 3V 0 1 0 PCI 5V 0 1 1 PCI in DO or Vaux 3 3V in D3cold mE 0 0 PCI 3 3V 1 0 1 PCI 3 3V in DO or Vaux 3 3V in D3cold 1 1 0 PCI 3 3V 1 1 1 PCI 3 3V in DO or Vaux 3 3V in D3cold 101309C Conexant 1 7 CX11252 HSFi Modem Data Sheet 1 3 4 Reference Design TAM Mode TAM Mode features include 8 bit u Law A Law and linear coding at 8 kHz sample rate Tone detection generation call discrimination and concurrent DTMF detection are also supported This mode supports applications such as digital TAM voice annotation and recording from and playback to the telephone line ADPCM 4 bit DS codin gis also supported to meet Microsoft WHQL logo requirements TAM Mode is supported by three submodes lt 1 Online Voice Command Mode supports connection to the i microphone speaker 2 Voice Receive Mode supports recording voice or audio data input typical
7. s Legal Information posted at www conexant com which is Reader Respoiise Co strives to produce quality documentation and welcomes your feedback Please send comments and suggestions to tech pubs conexant com For technical questions contact your local Conexant sales office or field applications engineer ii Conexant 101309C CX11252 HSFi Modem Data Sheet Contents Revision History 1 Introduction 1 1 OVGIVIGW uenire LIEN M ME III 1 2 Feattire S p Dies 1 2 1 ADDIICatIOns ertet tate 1 3 Technical Overview 1 3 1 General Description 1 3 2 Host Modem Software 1 3 3 Operating Data Fax Modes sees V 44 Data Compression Synchronous Access Mode SAM Video Confe ning Internal Switching Circuit d m TAM Software Speakerphone 1 3 4 Reference Design 14 Hardware Signal Interfaces 1 4 1 PCI Bus Mini PCI Bus Host ius 1 42 Serial EEPROM Interface 1 4 3 Telephone Line Interface 1 44 Call Progress Digital Speake 2 Technical Specifications ere 2 1 Establishing Data Modem Connections 2 1 1 2 12 Modem Handshaking Protocol 2 1
8. this method the software can detect an incoming call place the data connection on hold and Switch back to a data connection V 44 Data Compression 4 V 44 data compression Sncodes pages and files associated with Web pages more efficiently than V 42 bis These files include WEB pages graphics and image files and document files V 44 can provide an effective data throughput rate up to DTE rate for a 56 kbps e improved performance amount varies both with the actual format and with the content of individual pages and files V 44 data compression controlled by the 0544 extended format compound parameter which accepts the following subparameters ctiori Specifies the desired direction s of operation of the data compression e Di n from the DTE point of view negotiation Specifies whether or not the modem should continue to Operate if the desired result is not obtained Xa UN Capability Specifies the use of stream method packet method or multi packet method Max codewords tx Specifies the maximum number of codewords which should be negotiated in the transmit direction Max codewords rx Specifies the maximum number of codewords which should be negotiated in the receive direction e Max string tx Specifies the maximum string length to be negotiated in the transmit direction 101309C Conexant 2 3 CX11252 HSFi Modem Data Sheet e Max st
9. DTMF tone pairs is supported in accordance with ITU T Q 23 The transmit tone level complies with Bell Publication 47001 Pulse Dialing Pulse dialing is supported in accordance with EIA TIA 496 A Blind Dialing The modem can blind dial in the absence ge a dial tone if enabled by the or command Modem Handshaking Protocol If a tone is not detected within the time speci di in S7 register after the last digit is dialed the modem aborts the call eee Call Progress Tone Detection Ringback equipment busy sid progress tones can be detected in accordance with the applicable standard represented by the country profile currently in affect Ny E bs oF Answer Tone Detection Answer detected over the frequency range of 2100 40 Hz in ITU T modes and 2225 40 Hz in Bell modes Ring Detection can be detected from TTL compatible square wave input frequency is tr SE endent SN reception of data are vrevented for a period of time determined by country requirement to allow transmission of the billing signal 101309 Conexant 2 1 CX11252 HSFi Modem Data Sheet 2 1 7 Connection Speeds Data modem line speed can be selected using the MS command in accordance with V 250 The MS command selects modulation enables disables automode and selects transmit and receive minimum and maximum line speeds 2 1 8 Automode connect to a remote modem
10. In V 34 data modem mode the modem can operate in 2 wire full duplex asynchronous modes at line rates up to 33 6 kbps Data modem modes perform complete handshake and data rate negotiations Using V 34 modulation to optimize modem configuration for line conditions the modem can connect at the highest data rate that the channel can support tone and pattern detection functions required by the applicable MTU supported f bs In fax modem mode the modem can operate in 2 wire half duplex synchronous modes and can support Group 3 facsimile send and receive speeds of 14400 12000 9600 7200 4800 and 2400 bps Fax data transmission and reception performed by the modem are controlled and monitored through the fax EIA TIA 578 Class 1 or T 31 Class 1 0 command interface Full HDLC formatting zero insertion deletion CRC generation checking are provided V 44 Data Compression V 44 provides efficient data compression that ecreases die download time for the types of files associated with Internet use This significant improvement is most noticeable when browsing and searching the web since text files are highly compressible The improved performance amount varies both with the actual format and with the content of individual pages and files X S Synchronous Access Mode SAM Video Conferencing V 80 Synchronous Access M de between the modem and the host DTE is provided for host controlled ur n
11. THESE MATERIALS ARE PROVIDED AS S WITHOU WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED RELATING TO SALE AND OR USE OF CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE CONSEQUENTIAL OR INCIDENTAL DAMAGES MERCHANTABILITY OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT CONEXANT FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION TEXT GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS CONEXANT SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGE RUE WITHOUT LIMITATION LOST REVENUES OR LOST PROFITS WHICH MAY RESULT FROM THE USE OF THESE ZN ER ALS or Conexant products are not intend Conexant products for eni resulting from such improp use in medical lifesaving or life sustaining applications Conexant customers using or selling plications do so at their own risk and agree to fully indemnify Conexant for any damages e or sale Technologies K56flex MNP 10 Product names or services listed in this publication are for identification purposes The following are trade ns exant Systems Inc Conexant the Conexant C symbol What s Next in Communications d only and may be t ademarks of third parties Third party brands and names are the property of their respective owners For additional d s incorporated by i formation please consult Conexant
12. and Soft Buffers Line Interface TIP Modem 0 GPlOs Discrete RING Communication Drivers RAM and Components Multiplexers OH Application Software M DIG SPKR Call Progress Power Switching al Speaker Optional e g Sounducer Note Call progress and speakerphone capablility can be implemented with Conexant software drivers using PC audio hardware without the need for dedicated modem sounducer or other audio hardware 101571 002 101309C Conexant 1 3 CX11252 HSFi Modem Data Sheet 1 2 Features e Data modem with receive rates up to 56k bps and send rates up to 48 em tv 92 mode or up to V 34 rates V 90 mode V 92 90 K56flex V 34 V 32 bis V 32 V 22 bis V 22 V 212A and Bell 103 modulation modes Quick connect p Modem on hold 777 V 250 and V 251 commands Le J e Data compression and error correction aot 44 data compression for optimal downloading of Internet Web pages and files 42 bis and MNP 5 data compression T 7 42 and MNP 2 4 error correction e Fax modem with send and receive rates up to 14 4 kbps V 17 V 29 V 27 ter and V 21 channel 2 EIA TIA 578 Class 1 and T 31 Class 10 commands e Caller ID detect R i Caller ID detection Off hook Call Waiting Caller ID detection during data mode in V 92 V 90 V 34 V 32bis or V 32
13. e speakerphone error correct 1 data compression and operating system interface functions gt 1 3 3 Operating Modes ce Data Fax Modes V 92 data modem mode the modem supports the following e Receive data from digital source supporting V 92 over the digital telephone network portion of the PSTN at line speeds up to 56 kbps upstr am which transmits data at line speeds from 24 kbps up to 48 kbps in 4 dmn ements of 1 33 kbps eC ick Connect which allows quicker subsequent connection to a V 92 server using stored line parameters obtained during the initial connection 7 Modem on hold which allows detection and reporting of incoming phone calls on he PSTN with enabled Call Waiting If the incoming call is accepted by the user the user has a server pre defined amount of time of holding the data connection for a brief conversation The data connection resumes upon termination of the incoming call V 92 mode can fallback to V 90 mode In V 90 K56flex data modem mode the modem can receive data from a digital source using a V 90 or K56flex compatible central site modem over the digital telephone network portion of the PSTN at line speeds up to 56 kbps Asymmetrical data 1 6 Conexant 101309C CX11252 HSFi Modem Data Sheet transmission supports sending data at line speeds up to V 34 rates This mode can fallback to full duplex V 34 mode and to slower rates as dictated by line conditions
14. eters are programmable The current blacklisted and delayed numbers can be queried via AT B and AT D commands respectively AN N Commanded Tests 2 2 performed i in response to the amp T1 command per V 54 og Loopback amp T1 Command Data from the local DTE is sent to the Se which loops the data back to the local DTE lagno ic testing with the Conexant ModemXpert Modem Diagnostic Program is Dower Sleep Mode When not being used the modem assumes low power D3 state 2 6 Conexant 101309C
15. in accordance with V 250 2 2 Data Mode 27 Data mode exists when a telephone line connection has bonn established between modems and all handshaking has been completed 2 2 1 Speed Buffering Normal Mode Speed buffering allows a DTE to send data t and receive data from a modem at a speed different than the line speed The fno dem supports speed buffering at all line speeds 2 2 2 DTE to Modem Flow Control NC p 227 If the modem to line speed is less DTE to modem speed modem supports XOFF XON or RTS CTS flow c ntrol with the DTE to ensure data integrity 2 2 3 Escape Sequence Deren The escape sequence ca can be used to return control to the command mode from the data mode Escap sequence detection i is disabled by an S2 Register value greater than 127 2 2 4 GSTN Cleardown V 92 V 90 K56tlex V 34 V 32 his V 32 Upon receiving GSTN Cleardown from the remote modem in a non error correcting mode the modem cleanly terminates the call 2 2 5 Fall Fon V 92N 90 K56flex V 34 V 32 his V 32 oe the initial handshake the modem will connect at the appropriate speed to provide imal modem throughput within V 92 V 90 K56flex V 34 V 32 bis V 32 mode X dong ding upon signal quality and line conditions When connected in V 92 V 90 K56flex V 34 V 32 bis V 32 mode the modem will fall forward or fallback to the optimal line speed within the current modulation depending upon
16. lities Commands and parameters are defined in the Commands Reference Manual Order No 100498 Conexant 101309C 11252 HSFi Modem Data Sheet Table 1 1 Modem Models and Functions Model Order Part Numbers Application Supported Functions Device Set Modem Desktop or Mobile V 92 N 90 Data Order Number 100 Pin Part No Application V 44 Data Compression TAM V 17 Fax Software Speakerphone CX11252 11 CX11252 11 Desktop 0956 483 021 CX11252 11 Mobile Figure 1 1 CX11252 HSFi Modem Simplified Interface Standard DAA CX11252 HSF Modem 100 Pin TQFP PCI Bus Sounducer Optional Call Progress Note Call progress and speakerphone capablility can be implemente 1 w h Conexa hardware without the need for dedicated modem sounducer or other audio hardware T TELEPHONE LINE t software drivers using PC audio a 101571_001 Figure 1 2 CX11252 HSFi Modem Major Interfaces Conexant Modem Product OEM Cust Conexant 4e ON us Modem Conexant Modem Hardware Supplied Supplied Software gt Hardware Software CX11252 100 Host Computer Controland m Sats Controller Registers Codec rmm Operating and Codec RXA DAA Hardware TELEPHONE ata an System Interface 1 TXA2 LINE Modem Voice DMA Telephone i Software
17. ly from the telephone line or a microphone 3 Voice Transmit Mode supports playback of voice or audio data output typically to the telephone line or a speaker Nom A Software Speakerphone Software speakerphone may be accomplished through the System audio using audio drivers without the addition of dedicated m ic speaker circuitry to reduce component cost 4 PCI and Mini PCI Type IIIB reference are available to minimize application design time and costs These boards are pretested to pass FCC Part 15B and Part 68 for immediate manufacturing A design package for Gach board i is available in electronic form The design package includes schematics bill of materials BOM vendor parts list VPL board layout files in Gerber format and complete documentation The designs can alo be used for the basis of a custom designs by the OEM to accelerate design completion for vapid market entry Conexant 101309C CX11252 HSFi Modem Data Sheet 1 4 Hardware Signal Interfaces 1 4 1 PCI Bus Mini PCI Bus Host Interface PCI Mini PCI interface connects directly to an embedded or exterfi interface eliminating the need for additional external logic components cum The Bus Interface conforms to the PCI Mini PCI Local Bus Specification Production Version Revision 2 2 December 18 1998 and Mini PCI Specification Draft 1 0 It is a memory slave burst transacti
18. ons and a bus master for PC host memory accesses burst transactions Configuration is by PCI configuration proto AN The following interface signals are supported Y j e Address and data 32 bidirectional Address Data AD 3 1 0 bidirectional Four Bus Command and Byte Enable CBE 3 P bidirectional Bidirectional Parity PAR bidirectional e Interface control Cycle Frame FRAME bi Initiator Ready IRDY bidirectional Target Ready TRDY gt Stop STOP bidirectional Initialization Device Select input Device Select L bidirectional e Arbitration Request REQf output Grant GRANT input e Error reporting Parity Ertor PERR bidirectional System EUN bidirectional e System nterrupt A INTAR output Clock PCICLK input 55 Reset PCIRST input 59 Running CLKRUN input anagement Power Management Event output Vaux Detect VauxDET input 1 4 2 e EEPROM Interface A serial EEPROM may be used to store the Maximum Latency Minimum Grant Device Vies ID Vendor ID Subsystem ID and Subsystem Vendor ID parameters for the PCI Configuration Space Header Contact FAE the local Conexant sales office to determine 1f the EEPROM is required 101309C Conexant 1 9 CX11252 HSFi Modem Data Sheet The serial EEPROM interface optionally connects to a Mic
19. personal computing products CX11252 HSFi Modem Host Processed V 92 V 90 K56flex Modem Device Family for PCi Bus Desktop and Mobile Applications Data Sheet Preliminary gt CN N N N N NR SN NS SS lt Conexant Proprietary Information 5 4 Doc No 101309C CON EX AN T May 17 2001 CX11252 HSFi Modem Data Sheet Revision Notice Revision Date Comments C 5 17 2001 Rev C release B 5 2 2001 Rev B release A 12 7 2000 Initial release 2000 2001 Conexant Systems Inc All Rights Reserved Information in this document is provided in connection with Conexant Systems Inc Conexant products These materials are provided by Conexant as a service to its customers and may be used for informational purposes only Conexant assumes no responsibility for errors or omissions in these materials Conexant may make changes to specifications and product descriptions at any time without notice Conexant makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes tots specifications and product descriptions No license express or implied by estoppel or oth n ise T any intellectual property rights is granted by this document Except as provided in Conexant s Terms and Conditions of Sale for such products Conexant assumes no liability whatsoever
20. ps in V 92 or up rates in V 90 Data compression V 44 V 42 bis MNP 5 and error correction V are supported to maximize data throughput and data transfer integrity V 4 efficient data compression than V 42 bis that significantly increases downstream throughput thus reducing the download time for the types of files associated with Internet use such as Web pages and other uncompressed graphics image audio document files V 44 data compression can achieve compression rates of more than 25 over V 42bis Typical compression ratio for V 44 on Web type data is approximately 6 1 resulting in overall effective data throughput rate up to 300 ree for a 56 kbps connection Non error correcting mode is also supported models support remote audio recording and remote audio playback over the telephone line interface using A Law p Law or linear coding at 8 or 7 2 kHz sample rate to support applications such as digital telephone answering machine TAM Hardware based position independent full plex FDSP is optionally supported Fax Group 3 send and receive rates are supported up to 14 4 kbps with T 30 protocol V 80 synchronous access mode h host controlled communication protocols e g H 324 video conferencing S PCI and Mini PCI reference d ign A are available to minimize application design time and costs This data sheet describes the modem hardware capabi
21. r linear format for reading by the host commands control the bit length and sampling rate Concurrent DTMF tone is available 2 6 3 Voice Transmit Mode nd is active in order to playback voice to This mode is entered when the VTX com V is available Digitized audio data is the telephone line Concurrent DTM converted to analog form 2 1 Caller ID Both Type I Caller ID On Hook Caller ID and Type II Caller ID Call Waiting Caller ID are supported Both types of Caller ID are enabled disabled using the VCID command Call Waiting Tone detection must be enabled using the PCW command to detect and decode Call Waiting Caller ID When enabled caller ID information date time caller code and name can be passed to the DTE in formatted or unformatted form Inquiry support allows the current caller ID mode and mode capabilities of the modem to be retrieved from th modem Type II Caller ID Cal Waiting Caller ID detection operates only during data mode in V 92 V 90 V 34 V S2bis or V 32 e 2 8 Multiple e ie Support lode supports all countries The following capabilities are provided in additiorto the data modem functions previously described Country dependent s parame rs are included in the INF file for customization by the OEM Programmable Ne rameters supplies the DAA Country support depends on the OEM supplied DAA 101309C Conexant 2 5 CX11252 HSFi Modem Da
22. ring rx Specifies the maximum string length to be negotiated in the receive direction e history tx Specifies the maximum size of the history buffer to be negotiated in the transmit direction e history rx Specifies the maximum size of the history buffer i oben the receive direction iated in V 42 Error Correction V 42 supports two methods of error correction and as a fullback 4 modem provides a detection and negotiation technique for determining and establishing the best method of error correction between two modems A AA MNP 2 4 Error Correction zy MNP 2 4 is a data link protocol that uses error correction algorithms to ensure data integrity Supporting stream mode the modem sends data frames in varying lengths depending on the amount of time between characters coming from the DTE V 42 bis Data Compression V 42 bis data compression mode operates when a LAPM or MNP connection is established bd The V 42 bis data compression TT string learning algorithm in which a string of characters from the DTE is encoded fixed length codeword Two dictionaries dynamically updated during nofmal operation are used to store the strings MNP 5 Data Compression N MNP 5 data compression mode operates during an MNP connection In MNP 5 the its throughput compressing data into tokens before transmitting it to the emote modem and by decompres
23. rochip 93LC66B 256 x 16 93LC56B 128 x 16 Atmel AT93C66 256 x 16 AT93C56 128 x 16 or equivalent serial EEPROM Its size can be reduced from the total of 4096 256 x 16 bits down to 2048 128 x 16 bits in non PC card applications The EEPROM is programmable by the PC via the PCI Bus interface see Section 4 1 4 3 Telephone Line Interface The CX11252 codec connects to the telephone line through a standard disci rete DAA Se The following DAA interface signals are supported 11 A single ended Receive Analog input RXA and a differential Transtait Analog output TXA1 and TXA2 to the telephone line fy ZS Off hook OH relay control output for connecting the m dem to the telephone line NC oo Ring Indicate IRING input for sensing a raw incoming ring signal e General purpose inputs outputs GPIOs 1 4 4 Call Progress Digital Speaker A digital speaker output DSPKOUT is provided wl ich can be directed to a low cost OEM supplied speaker circuit for call progress in Data Fax mode Alternatively call progress may be accomplished through the system audio using modem audio drivers in order to reduce component cost in case the digital speaker circuitry would not be needed 522 201 1 10 Conexant 101309C 11252 HSFi Modem Data Sheet Technical Specifications 2 1 3 2 1 4 2 1 6 Establishing Data Modem Connections Dialing DTMF Dialing DTMF dialing using
24. s temote telephone answering machine TAM soft speakerphone and PCI Mini PCI Bus interface operation The modem operates with PSTN telephone lines in the US apan Canada and worldwide Available models are listed Table 1 1 The CX11252 alone supports an analog interface to an OEM provided DAA Figure 1 1 This configuration supports data fax telephone answering machine TAM and software speakerphone Discrete input output lines interface to off hook relay control and ring detection circuits This is the lowest cost solution for operation in the U S Japan Canada China South America CTR21 TERIN countries supported are defined by the OEM provided DAA Optimized to provide the lowest cost desig n ide price sensitive modem markets the 11252 is ideally suited for host rocessed PCI Mini PCI Bus based desktop or mobile applications such as motherboards system boards plug in cards The 11252 incorporates th following circuits internally to reduce the application board bill of material BOM cost Aninternal voltage regulator allows operation in 5 V PCI systems without requiring an external regulator Aninternal power switching circuit detects and selects operation from one of es PCI 5 V PCI 3 3 V or Vaux 3 3 V which may available in diff t combinations to a modem from a PC This allows a single modem configura on to be used with different PCI based PC designs e Aninternal ringwake filter elimina
25. signal quality 2 2 Conexant 101309C CX11252 HSFi Modem Data Sheet 2 2 6 2 3 Modem on Hold 22 2 2 44 Error Correction and Data The modem may lose synchronization with the received line signal under poor line conditions If this occurs retrain is initiated to attempt recovery depending on the type of connection Under such line conditions retrain is also initiated after three consecutive renegotiations when the modem receives errors and retransmits data If 30 nds of retrain elapse without the modem connecting the call will be terminated modem on hold function enables the modem to data to the Internet on hold while using the same line to accept an incoming or place an outgoing voice call This feature is available only with a connection to aV 92 server and can be executed through two methods One method is to enable MOH through the PMH with Call Waiting Detection PCW command enabled an incoming call can be detected while on line Using a string of commands the modem negotiates with the server to place the data connection on hold while the line is released so that it be used to conduct a voice call Once the voice call is completed the mode n quickly fenegotiate with the server back to the original data call An alternative method is to use coniu ications 50 ftare that makes use of the Conexant modem on hold drivers Using
26. sing encoded received data before sending it to the DTE 2 5 Fax Class 1 and Fax Class 1 0 Operation Facsi ile functions operate in response to Fax Class 1 commands when FCLASS 1 or to Fax s 1 0 commands when FCLASS 1 0 d NS ax mode the on line behavior of the modem is different from the data non fax After dialing modem operation is controlled by fax commands Some NS commands are still valid but may operate differently than in data modem mode N Calling tone is generated in accordance with T 30 2 6 TAM Mode Voice and audio functions are supported by the Voice Mode Voice Mode includes three submodes Online Voice Command Mode Voice Receive Mode and Voice Transmit Mode 2 4 Conexant 101309C CX11252 HSFi Modem Data Sheet 2 6 1 Online Voice Command Mode This mode results from the connection to the telephone line or a voice audio I O device e g microphone or speaker through the use of the FCLASS 8 and VLS commands After mode entry AT commands can be entered without aborting the connection 2 6 2 Voice Receive Mode This mode is entered when the VRX command is active in order recorc telephone line NEC S Received analog voice samples are converted to digital form and compressed for reading by the host AT commands control the codec sample rate F 7 Received analog mono audio samples are converted to digital and formatted into 8 bit u Law Law o
27. ta Sheet 2 8 1 2 8 2 2 9 2 9 1 2 10 Blacklist Parameters Diagnostics E 7 SS pported OEM Programmable Parameters The following country dependent parameters are programmable e Dial tone detection levels and frequency ranges DTMF dialing transmit output level signal duration and DIME nerve e Ring detection frequency range d m e Blind dialing disable enable e The maximum minimum and default carrier transmit level values e Calling tone generated in accordance with V 25 may also be disabled e Call progress frequency and tone cadence for busy ringback congested dial tone 1 and dial tone 2 e Answer tone detection period e On hook off hook make break and set clear relay control parameters The modem can operate in gt with requi ents of individual countries to prevent misuse of the network by limiting repeated calls to the same number when previous call attempts have failed Call failure can be detected for reasons such as no dial tone number busy no answer no ringback detected voice rather than modem detected and key abort dial attempt aborted by user Actions resulting from such failures can include specification of minim m inter call delay extended delay between calls and maximum numbers of retries before the number is permanently forbidden blacklisted Up to 20 such numbers may be tabulated The blacklist param
28. tes the need for an external diode resistor capacitor circuit External pin strapping options can be used to select PCI ID from internal ROM eliminating need for external EEPROM 2 The CXi1 11252 integrates all digital and analog circuits into a single VLSI very large lt integration die packaged in 100 pin thin quad flat pack TQFP Internal digital cuits include PCI Bus interface logic 5 V voltage regulator PCI Bus power switching ROM RAM control and status registers general purpose input output internal ringwake filter and codec interface Figure 1 2 The analog codec circuit includes a differential transmit analog output a single ended receive analog input and an or modem speaker output Modem data pump and controller functions traditionally implemented in dedicated hardware are processed in a Pentium MMX compatible PC using host signal processing modem software 101309C Conexant 1 1 CX11252 HSFi Modem Data Sheet In V 92 V 90 K56flex data mode the modem can receive data at speeds up to 56 kbps from a digitally connected V 92 V 90 or K56flex compatible central site modem A V 92 V 90 K56flex modem takes advantage of the PSTN which is primarily digital except for the client modem to central office local loop and are ideal for applications such as remote access to an Internet Service Provider ISP on line service or corporate site In this mode the modem can transmit data at speeds up to 48 kb
Download Pdf Manuals
Related Search