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Chapter 1 Installation

9

Replace the computer cover.

Connect the telephone cord. Plug one end of the phone cord
into the jack marked LINE. Plug the
other end into a phone jack (where
you would normally connect a phone).

You can also plug a regular
telephone into the jack marked
PHONE. The telephone shares the
phone line with the faxmodem and
works as a normal telephone when
the faxmodem is not in use.

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Содержание ComStar SVD

Страница 1: ...COMST R SVD Owner s Manual 33 600 bps Faxmodem with Speakerphone SVD and Voice Mail ...

Страница 2: ...ll work properly in all environments and applications Although the hardware has been tested the manufacturer makes no warranty and representation either implied or expressed with respect to the hardware and the documentation quality performance merchantability or fitness for a particular purpose The manufacturer reserves the right to make changes to the hardware and Owner s Manual content without ...

Страница 3: ...ce Fax and Data Communications Software 19 Initialization Strings 19 Using AT Commands 21 Returning to the Factory Settings 22 Using the Speakerphone Feature 22 Simultaneous Voice and Data SVD and Other Advanced Telephony Operations 23 Chapter 3 Problems and Solutions 28 General Troubleshooting 29 Echo Troubleshooting 32 Dial Troubleshooting 32 On line Troubleshooting 33 Voice Speakerphone Trouble...

Страница 4: ...omStar SVD s Settings 44 Appendix E AT Commands 45 Voice Commands 52 Appendix F S Registers 56 Appendix G Result Codes 60 Appendix H Regulatory Information 62 FCC Part 68 Telecommunications Statement 62 FCC Part 15 Emissions Statement 63 Industry Canada Attachment 64 Canadian Emissions Statement 65 Appendix I Physical Specifications 66 Index 67 ...

Страница 5: ...nstallation troubleshooting and reference guide Once you have successfully installed the modem in your IBM PC compatible computer software controls virtually all access to the fax data speakerphone voicemail and other product features While many data communications features can be controlled using AT commands and S registers there is rarely any reason to do so The software shipped with this produc...

Страница 6: ...ived the following items Q Your ComStar SVD hardware referred to in this manual as a modem or faxmodem Q Phone cord Q External speaker Q Microphone with stand Q A CD ROM containing voice fax data software and other software documentation and customer support information Q Voice fax data software on floppy disks in case you don t have a CD ROM drive These floppies also contain some helpful installa...

Страница 7: ...refer to the modem Q Commands and command examples described in this guide appear in bold type For example To reset the modem type ATZ and press Enter Occasionally we insert spaces between commands to make a command line easier to read You can type the command line with or without spaces between commands as long as the command line does not exceed 40 characters Q 0 in a command line indicates the ...

Страница 8: ...ed near a phone jack Take the cover off your computer This is a little different for every computer If you are not familiar with the procedure consult your computer s manual for more detailed instruc tions Locate an available 16 bit slot see the illustration on the next page Note that the faxmodem has two sections of gold connecting fingers A 16 bit slot has double connectors to match the fingers ...

Страница 9: ...r end into a phone jack where you would normally connect a phone You can also plug a regular telephone into the jack marked PHONE The telephone shares the phone line with the faxmodem and works as a normal telephone when the faxmodem is not in use 6 3 3 2 21 1 R RS SW WLLR RQ QD DOO 1 1 0 0 5 52 23 3 2 21 1 7 7 5 51 1 6 63 3 5 5 LINE PHONE MIC SPK 7 ...

Страница 10: ... into the slot on the microphone stand Finally slide the microphone stem into the groove on the microphone stand Refer to the assembly drawing on the next page Insert the microphone plug into the jack marked MIC and then insert the external speaker plug into the jack marked SPK The diagram on the next page shows the connections 8 9 ...

Страница 11: ...ug in your computer and turn it ON If you are running Windows 3 1 or 3 11 proceed to Setting Up Your Faxmodem with Windows 3 1 or 3 11 on page 16 If you are running the Windows 95 operating system proceed to the next section 10 11 ...

Страница 12: ...ists A as the default drive If you are installing from the CD ROM type D unimodem and click OK this assumes that your CD ROM drive is the D drive If it isn t substitute the correct drive letter for D If you are installing from a floppy disk make sure that correct drive is designated in the Install From Disk dialog box A is probably correct Insert the BitWare Disk 1 in the drive and click OK Window...

Страница 13: ...cause you will be asked to set the COM port when you configure your software applications Problems with Plug and Play Setup If this setup doesn t proceed properly read and perform the following steps before calling Tech Support Using the Hardware Conflict Wizard Windows 95 with its Plug and Play feature is a major improvement over previous versions of Windows But under some circumstances Plug and ...

Страница 14: ...t using your modem with voice fax data software If you still have problems it probably means that although you are running Windows 95 which supports Plug and Play you may have an older computer that is not completely compatible with this feature Try the steps in the next section Changing the COM settings in BIOS This procedure is a little more difficult than the previous one but with the help of y...

Страница 15: ...When Windows 95 displays the Confirm Device Removal warning Click OK Double click Modem in the Device Manager window Double click the ComStar SVD icon Click the Resources tab Uncheck the Use automatic settings checkbox Scroll through the Basic configuration options until you find the one that displays the Input Output Range 02F8 02FF and Interrupt Request 03 This is COM2 The Conflicting device lis...

Страница 16: ...rt 3 successfully sets the modem to COM3 and a free IRQ usually 12 or 11 Once the program finds a free IRQ it tries to communicate with the faxmodem using these settings If successful the program asks if you want it to automatically modify your AUTOEXEC BAT and SYSTEM INI files We strongly recommend that you answer Yes to these prompts If unsuccessful PORTWIZ checks more IRQs until it finds one th...

Страница 17: ...r best to configure your faxmodem on a free IRQ it is possible that another piece of your hardware also is configured to use that IRQ That is why the programs first try to query the IRQs least likely to be used by your system In the unusual event that PORTWIZ configures your faxmodem to use a COM port IRQ combination that conflicts with other hardware either the faxmodem or the other hardware won ...

Страница 18: ... BAT and SYSTEM INI files for you type portwiz 2e8 10 w and press Enter The w activated the Wizard mode which handles the file changes automatically 3 If you are unsure of which IRQ to use you can instruct PORTWIZ to try a series of IRQs in sequence Use only IRQs 12 11 15 10 7 and 5 in that order You may specify any or all of them in this example You also may use the w switch to activate the Wizar...

Страница 19: ...e the programs included with this product If you run into difficulty with configuration it may be helpful to read Tips for Selecting Setup Options on the next page As explained earlier software programs are designed as a simple user friendly interface that makes it easy to use the many features ComStar SVD offers However first the software must identify the modem and its special capabilities Many ...

Страница 20: ... this modem and there is no need to change them However you should be aware of the following items Q If you are asked to select the modem type from a menu and you don t see this modem listed by name on the menu select the most descriptive name such as Zoom FaxModem any SVD modem Rockwell Based Voice modem Hayes compatible modem with or without a specific speed or Generic Class 1 Modem The more gen...

Страница 21: ...ing use ATDT if your phone line uses tone dialing as most do ATDP if the line uses pulse dialing Q If your telephone service includes Call Waiting that you can temporarily suspend by pressing 70 include ATDT 70 in the dial string NOTE Be sure to type the comma For pulse dialing use ATDT1170 as the dial string For more information about handling Call Waiting contact your telephone company Q If your...

Страница 22: ...an be controlled using AT commands although we do not recommend that the average user do so If you would like to control the speakerphone feature using AT commands while in terminal mode further information is provided in Appendix D To use the speakerphone feature of the modem be sure that the microphone and speaker are plugged into the jacks on the rear of the modem Then see your software documen...

Страница 23: ...ble NOTE Because the speaker output affects the microphone sensitivity you get the best performance from the speakerphone feature if you keep the speaker and the microphone separated Simultaneous Voice and Data SVD Your ComStar SVD uses Rockwell s AudioSpan technology to allow simultaneous voice and data transmission over a single telephone line This means that you and another person with an Audio...

Страница 24: ...ur modem s initialization string These AT commands turn AudioSpan on and off and select the hardware settings you use to speak with and listen to another user The general form of the commands is ASn ON to turn AudioSpan on and ASn OFF to turn AudioSpan off Where n is a number from 1 to 6 The following chart describes the use of the numbers Voice Device Moderate Voice Quality with Faster Data Best ...

Страница 25: ...ormally it is located in a menu such as Communications Setup or Modem Setup under a configuration menu If you have trouble finding your initialization string consult the software s documentation How to Enter the AudioSpan Command Example The existing initialization string is AT F C1 D2 To use AudioSpan in speakerphone mode with faster data add AS5 ON to the end of the initialization string AT F C1...

Страница 26: ...Mode Select DSVD SVD data only SMS y or z optional y or z Modulation selected See SQS command below value V 61 ML144 ML288 3 means enabled 2400 3 y default 4800 3 y and z default 3 y default 3 7200 3 3 9600 3 3 12000 3 3 14400 3 z default 3 16800 3 21600 3 24000 3 26400 3 28800 3 z default SMS t optional Where t is the symbol rate for SVD mode ML288 modulation only 0 Auto Selection default 1 2400 ...

Страница 27: ...his device before playing back any message VLS 3 Receive only device Normally this is the microphone Select this device before recording a message VLS 4 Telephone line with speaker ON and handset This option lets the user monitor an incoming message as it is recorded VLS 5 Telephone emulation This is a headset or speakerphone powered directly by the modem VLS 6 Speakerphone This is a speakerphone ...

Страница 28: ...takes too long to hang up at the end of a call 30 The modem fails to execute an AT command line 30 No response appears after executing a command 30 You receive an ERROR response 30 The modem goes off hook and seizes the telephone line 31 The modem does not auto answer 31 You encounter other communications problems 31 The modem speaker volume is too high or too low 31 Each character appears twice o...

Страница 29: ...issing hard drive or missing floppy drive error message Some computers boot too quickly for the Plug and Play information to get from the modem s firmware embedded software to its special PnP chip There are two things you should do first don t let your computer skip the memory test at bootup most computers let you press a key to skip the test second ask your computer s manufacturer for the latest ...

Страница 30: ...for the same COM port as your modem For example if the modem is configured for COM4 the software should be configured for COM4 Be sure your modem is not in data mode when you type the command Use the escape character sequence to switch to terminal mode The default escape sequence is to wait at least one second type and wait another second or more No response appears after executing a command If yo...

Страница 31: ...e initialization string are sent to the modem each time you start your software and override the settings stored in the modem s nonvolatile memory On IBM PC compatible computers memory resident TSR programs can cause a variety of problems for some fax software programs Try starting up your computer without them Examples of TSRs include anti virus programs screen savers and data protection software...

Страница 32: ...ned on in your software so that you can hear dialing sounds Also make sure that the phone line is plugged in Make sure that your are dialing a valid phone number including any required dial prefixes If you are using tone dialing on a line that requires pulse dialing the line may not be able to accept tone dialed calls Select Pulse dialing in your software or include the P command in place of T in ...

Страница 33: ...r Negotiate speed and protocol default setting AT F Negotiate speed only do not use protocol AT N0 Connect at 28800 bps negotiate protocol AT MS 11 Connect at 28800 bps no protocol AT N0 MS 11 Connect at 14400 bps negotiate protocol AT MS 10 Connect at 14400 bps no protocol AT N0 MS 10 Connect at 9600 bps negotiate protocol AT MS 9 Connect at 9600 bps no protocol AT N0 MS 9 Connect at 2400 bps neg...

Страница 34: ...s you choose followed by W0 or W1 and press Enter For example if you type AT C1 D2 W0 and press Enter the C1 and D2 parameter settings are stored in Profile 0 See Appendix E for the table of AT commands To force Type these commands and press Enter MNP5 MNP4 operation AT N5 LAPM only AT N4 MNP4 only AT N5 C0 MNP10 operation AT K1 SEC 1 Normal operation The faxmodem will communicate without any erro...

Страница 35: ...er telephones inform the other users when you will be making a data call Your telephone line may have a Call Waiting feature and a call is being received See Call Waiting discussion above Random errors occur or data is missing in transmitted data Use the MNP or V 42 protocol if the remote modem supports one of these protocols See the table on page 34 for more information Select a lower baud rate i...

Страница 36: ...ling directory Be aware that many files downloaded from bulletin boards have already been compressed In general your modem will not be able to further compress such files Voice Speakerphone Troubleshooting You can t talk with the person at the other end while transferring files The other party doesn t have an AudioSpan compatible SVD modem Not all SVD and DSVD Digital Simultaneous Voice and Data m...

Страница 37: ...ed by the Ports option in the Windows Control Panel For information see your Microsoft Windows User s Guide Your computer response time slows down when an incoming voice message is being recorded Receiving and storing voice messages on your hard disk requires a great deal of disk accessing time from your computer As a consequence other operations can slow down dramatically Consider activating the ...

Страница 38: ...dards V 33 V 17 V 29 V 27 ter and V 21 channel 2 Class 1 Group 3 fax Voice Storage and Playback Enhanced ADPCM voice coding and decoding programmable at 4 or 8 bits per sample with a 7200 Hz sample rate 8 bit monophonic linear voice encoding SVD Operation Data rates of 4 8 kbps in V 32bis mode V 61 up to 14 4 kbps ML144 up to 24 0 kbps ML288 Approvals FCC Part 15b and Part 68 Telecommunications ap...

Страница 39: ...d decoder silence interpolation for efficient voice message storage Automatic self diagnostics Digital and analog loop back diagnostics Automatic adaptive equalization Nonvolatile RAM for storage of up to four 35 digit telephone numbers and alternate configurations Automatic gain control Inactivity timer when set hangs up if no data in programmable time from 1 to 42 minutes Call progress tone deco...

Страница 40: ...ack jumper in place on it NOTE Remove the faxmodem from your PC and orient it component side up with the metal faceplate facing to the right and the gold teeth pointed down J25 J16 J10 J6 Q The first jumper block shown in the diagram next to the callout J25 controls microphone bias For an electret microphone like the one supplied with your faxmodem leave the jumper in place For a dynamic microphon...

Страница 41: ...kers Med High ON ON For unpowered passive speakers Med Low OFF OFF For powered amplified speakers Low OFF ON For powered amplified speakers Q The final jumper block J16 is changed only if you install speakers with a stereo plug the speaker that comes with your faxmodem has a mono plug If your speaker s plug looks like this install a jumper If your speaker s plug looks like this remove the jumper ...

Страница 42: ...VD to detect this information and make it available to the program In this case you should let your software control the use of this feature Set up your software to answer after at least two rings This allows time for the Caller ID information to be displayed If your software does not support Caller ID you still can tell the modem to report Caller ID information 1 Use your communications software ...

Страница 43: ...e Once you are in terminal mode you can use the speakerphone feature by following the procedures explained in this appendix Turning On The Speakerphone Feature To use the speakerphone feature you must first be in voice mode To do this Q In terminal mode type AT CLS 8 and press Enter Once you are in voice mode you can turn on the speakerphone feature Q In terminal mode type AT VLS 6 and press Enter...

Страница 44: ...setting assign a value between 0 and 16 The higher the number the quieter the speaker s volume will be For example assigning the value 16 will turn the speaker off 5 is the default value for this setting Q For the mic gain setting assign a value between 0 and 3 The higher the value the more sensitive the microphone 1 is the default value for this setting An Example of changing the ComStar SVD s Se...

Страница 45: ... itself without a carriage return causes the modem to repeat the previous command To switch to AT command mode from data mode wait at least one second type the default escape characters and wait at least one second before entering other characters After the OK message from the modem you can enter AT commands To return to data mode type ATO and press Return or Enter AT commands for SVD simultaneous...

Страница 46: ...OK or ERROR I3 Returns firmware revision code I4 Returns modem identifier string I5 Returns country code I6 Returns data pump model and revision code L1 Low speaker volume L2 Medium speaker volume L3 Highest speaker volume M0 Speaker always off M1 Speaker on until carrier detected M2 Speaker always on M3 Speaker off during dialing then on until carrier N0 Disables auto mode automatic modulation ne...

Страница 47: ... Sends all responses Y0 Disables long space disconnect Y1 Enables long space disconnect with error correction hangs up after 1 6 second signal break without error correction sends 4 second space before hanging up Z0 Resets modem to profile 0 See W0 Z1 Resets modem to profile 1 See W1 C0 Forces RLSD DCD on C1 RLSD DCD follows remote carrier D0 DTR is assumed on Allows operation with DTEs that do no...

Страница 48: ...rier loss For engineering testing only T0 Ends test in progress T1 Starts local analog loopback test T2 Returns error T3 Starts local digital loopback test T4 Responds to remote modem request for digital loopback T5 Ignores remote modem request for digital loopback T6 Requests remote digital loopback without self test T7 Same as T6 with self test T8 Starts local analog loopback with self test V Di...

Страница 49: ...modem to modem flow control Kn Defines break type N0 Normal data link with speed buffering no error correction N1 Selects serial interface same as Q0 N2 Selects reliable error correction mode first LAPM then MNP N3 Selects auto reliable mode LAPM MNP Normal N4 LAPM error correction only N5 MNP error correction only V 0 Disables Single Line Connect Message V 1 Enables Single Line Connect Message wh...

Страница 50: ... 0 3 sec ON 0 2 sec OFF 1 sec ON 0 2 sec OFF 0 3 sec ON 4 sec OFF K0 Disables V 42 LAPM to MNP10 conversion K1 Enables V 42 LAPM to MNP10 conversion K2 EnablesV 42LAPMtoMNP10conversion inhibitsMNPExtended ServicesinitiationduringV 42LAPManswermodedetection Q0 Disables MNP 10 fallback to 2400 bps Q1 Enables MNP 10 fallback to 2400 bps SEC 0 Disables MNP10 EC operation 6 QDEOHV 013 RSHUDWLRQ E0 Disa...

Страница 51: ...9 Bell 212 1200 74 V FC 28800 26400 24000 21600 19200 16800 14400 auto mode Enables or disables automatic modulation negotiation with the remote modem 0 Disables Equivalent to N0 command 1 Enables Equivalent to N1 command min rate See Possible Rates bps above Default 300 bps max rate See Possible Rates bps above Default 33600 bps NOTE Use a comma to separate optional subparameters For example MS 1...

Страница 52: ...eporting CID 2 Enables unformatted Caller ID reporting CLS 0 Selects data mode CLS 1 Selects Class 1 fax mode CLS 2 Selects Class 2 fax mode CLS 8 Selects voice audio mode MDL Requests the model number or name of the modem MFR Requests the modem manufacturer REV Requests the revision level TL n Adjusts the transmit level of the data pump audio output where n 0000 7FFF Default is 7FFF if local hand...

Страница 53: ...ource VSD 0 Disables Voice Receive Mode silence deletion Provides no function other than command response compatibility VSD 1 Enable Voice Receive Mode silence deletion Provides no function other than command response compatibility VSK 255 Turns on the skid spare buffer space Any number other than 255 returns an error VSP n Turns on the silence period detection timer where 1 n 255 tenths of a seco...

Страница 54: ... answer tone capability 1 enable V 25 T 30 2100 Hz answer tone capability 1 4 0 disable Bell 2225 Hz answer tone capability 1 enable Bell 2225 Hz answer tone capability 1 5 0 disable call progress tone and cadence capability 1 enable call progress tone and cadence capability 1 6 7 Reserved Notes 1 The modem detects this tone cadence and reports it via a shielded code to the DTE 2 Tone detection is...

Страница 55: ...sentsthesecondfrequency 0or200 3000Hz z represents the duration in 100 ms units x z x represents the DTMF digit 0 9 A D z represents the duration in 100 ms units x x represents the DTMF digit 0 9 A D with the duration defined by VBT VTX Sends a voice file to the line speaker or handset as established by the VLS command VGTn Sets the playback volume of the headphone and speaker outputs where n 128 ...

Страница 56: ...haracter S6 2 255 seconds 2 Dial tone wait time before blind dialing S7 1 255 seconds 50 Remote carrier wait time S8 0 255 seconds 2 Comma pause time S9 1 255 100 ms 6 Carrier detect response time S10 1 255 100 ms 14 Delay between carrier loss and hang up S11 50 255 1 ms 95 Tone duration in DTMF dialing S12 0 255 20 ms 50 Escape code guard time S13 RESERVED S14 BIT MAPPED OPTIONS S15 RESERVED S16 ...

Страница 57: ...onnects 3 Modem stays on line and establishes a Normal mode speed buffering connection 4 Attempts MNP connection if fails disconnects 7 Attempts MNP connection if fails establishes a Normal mode speed buffering connection S37 0 12 0 Desired DTE connection speed 0 Attempt automode connection F0 1 3 Attempt to connect at 300 bps F1 4 Reserved 5 Attempt to connect at 1200 bps F4 6 Attempt to connect ...

Страница 58: ... 138 Data compression selection 136 Error correction with no compression 138 Error correction and compression S48 0 7 or 128 7 V 42 negotiation action 0 No negotiation bypass detection and negotiation phases proceed with LAPM 7 Negotiation 128 No negotiation bypass detection and negotiation phases proceed with S36 fallback action S80 RESERVED S82 3 7 or 128 128 Break handling options 3 Break immed...

Страница 59: ... 8 No framing technique in common 9 Modems could not find a common protocol 10 Bad response to feature negotiation 11 No synch information from remote modem 12 Remote modem initiated a normal disconnect 13 Remote modem does not respond after 10 message re transmissions 14 Protocol violation S95 Add numbers below for desired messages 0 Extended result codes 0 CONNECT gives computer to modem DTE spe...

Страница 60: ... If the column is blank the modem does not generate a message for that X option A 1 or 3 after a check mark indicates the less explicit message that the modem generates for that option For example if the modem is set for long form messages the value of Xn is X0 and the computer to modem speed is 1200 bps the modem generates the message CONNECT and not CONNECT 1200 Short Long n Value in ATXn C d Fo...

Страница 61: ... 49 CARRIER 7200 50 CARRIER 9600 51 CARRIER 12000 52 CARRIER 14400 54 CARRIER 19200 55 CARRIER 21600 56 CARRIER 24000 57 CARRIER 26400 58 CARRIER 28800 59 CONNECT 16800 1 61 CONNECT 21600 1 62 CONNECT 24000 1 63 CONNECT 26400 1 64 CONNECT 28800 1 66 COMPRESSION CLASS 5 67 COMPRESSION V 42 bis 69 COMPRESSION NONE 70 PROTOCOL NONE 77 PROTOCOL LAPM 78 CARRIER 31200 79 CARRIER 33600 80 PROTOCOL ALT 84...

Страница 62: ...nnected to the line inform them of a The telephone number that this unit is connected to b The ringer equivalence number 0 8B c The USOC jack required RJ11C and d The FCC Registration Number Items b and d are indicated on the label attached to the bracket The ringer equivalence number is used to determine how many devices can be connected to your telephone line In most cases the sum of the RENs of...

Страница 63: ...erence to radio and television reception This modem has been tested and found to comply with the limits for a Class B Computing Device in accordance with the specifications in Subpart B of Part 15 of the FCC Rules which are designed to provide reasonable protection against such interference in a residential installation However there is no guarantee that interference will not occur in a particular...

Страница 64: ...nt must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipmen...

Страница 65: ... to prevent overloading You can use any combination of devices subject only to the requirement that the total of the Load Numbers of all devices does not exceed 100 The Load Number for your modem is 6 Canadian Emissions Statement This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil numérique de la classe B respecte toutes les...

Страница 66: ...crophone Size 6 70 x 3 90 without connector 6 70 x 4 20 with connector Height 625 maximum from top of board Electrical Specifications Power Consumption 3 8 Watts Maximum 1 1 Watt Idle Performance Specifications Transmit Signal Level Nominal 10 1 dBm Transmit Frequency Tolerance 0 01 percent Receive Signal Level 9 dBm to 43 dBm Receive Frequency Tolerance 7 Hz ...

Страница 67: ...C Call progress tone decoding 39 Caller ID 42 Characters do not appear on screen 32 D Data garbled 35 37 Data communications software configuration 29 using 19 Data compression bulletin boards 36 communicating without 34 Default settings returning to 22 44 Dial string 20 31 Dial troubleshooting 32 E Echo troubleshooting 32 31 Error correction communicating without 34 ERROR response 30 Escape chara...

Страница 68: ... PNP 5 problems with 13 Problems 28 See also your communications software documentation Product Summary 38 Protocols supported 38 R Regulatory information 62 Result codes 60 S S Registers 56 Speaker using 22 volume 31 Speakerphone changing settings 44 setting audio jumpers 40 turning on with AT commands 43 Speakerphone Feature using 22 Specifications 66 Starting the modem 20 SVD simultaneous voice...

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