WebPhone™ Version 3.0 16-Bit Release Notes Copyright © 1995, 1996 NetSpeak Corporation. All rights reserved. PLEASE READ THIS DOCUMENT COMPLETELY BEFORE YOU DO ANYTHING ELSE! WebPhone™ is a professional, feature rich audio and video communication system, which requires some preparation on your part in order to use it properly and to take advantage of all the functions that it has to offer. Please take the time now to read through these release notes (wpnotes.wri) and read the How to Guide (wphowto.wri) or run the User Manual (wpman.exe) to learn how to operate your WebPhone (webphone.exe) before attempting to use it or if you require help. 0. Table of Contents 1. Entering information in the Configure window 2. Entering your User Information 3. Entering your Network Parameters 4. Finding someone to talk to 5. Information search criteria 6. New Features 7. Limitations of WebPhone 3.0 8. Purchasing WebPhone 3.0 9. Hardware and Software Requirements 10. NetSpeak Corporation 11. Installing WebPhone 3.0 12. WebPhone Directory Structure 13. Operating your WebPhone on the Internet via a Dialup Connection 14. Operating your WebPhone on a network 15. Operating your WebPhone on a network connected to the Internet 16. Audio Programs and your WebPhone 17. WinSock Programs and your WebPhone 18. VGA Displays and your WebPhone 19. Sound Cards and your WebPhone 20. Modems and your WebPhone 21. WebPhone Databases 22. How your WebPhone works 23. GSM and TrueSpeechÔ audio codecs 24. Half Duplex vs. Full Duplex 25. Troubleshooting 26. Known problems in this version 27. Acknowledgments 1. Entering information in the Configure window When you start your WebPhone (webphone.exe) for the first time, it will open the Configure window for you to specify your User Information and Network Parameters if you didn't enter your configuration information during WebPhone installation. This information is very important. If you enter erroneous data, chances are your WebPhone will not operate properly. Once you enter your User Information and Network Parameters, press the CONFIGURE text, located on top of the Configure window, to save the information. 2. Entering your User Information Please enter all your User Information. If it is inaccurate, you will be misrepresented in NetSpeak's Information Assistance and other WebPhone users will not be able to find you to call you. In addition, your 'Caller ID' information will be incorrect when you place outbound calls. Information You can select how much of your user information will be published in NetSpeak's Information Assistance (all, some or none) to be made visible to other WebPhone users. Use standard Post Office abbreviations Use standard post office abbreviations for your State so other WebPhone users can find you via Directory Assistance (e.g., use FL instead of Florida). 3. Entering your Network Parameters The Network Parameters required in this release are your: · E-mail address that serves as your WebPhone number · WebPhone password protects others from using your WebPhone number · Password Confirmation used to confirm your WebPhone Password · POP Server address used for retrieving your off-line voice mail messages · SMTP Server address used for sending voice mail to off-line parties · E-Mail Login used for connecting to your POP Server · E-Mail Password used for connecting to your POP Server WebPhone Password The WebPhone password prevents other users from using their WebPhones to assume your identity. Once you have configured your WebPhone with your e-mail address, no one else can configure a WebPhone with your e-mail address. Note, however, that only the e-mail address is protected, i.e. other users can still configure their phones with whatever first and last names they desire. The WebPhone password also affords you the ability to install your WebPhone on multiple systems, although you will only be able to use one at a time. Enter a unique password for your WebPhone that will not be obvious for others to guess. Re-enter the password you have selected in the "Password Confirmation" field. You will not need to enter your password each time you use the WebPhone, but you will need to enter your password if you reinstall the WebPhone for any reason, so take care not to lose your password. You may change your WebPhone password at any time by entering a new password in the WebPhone Password and password confirmations fields. A message will be displayed when your password change has been accepted. Please write this password down and save it in a safe place for future reference. If you forget your password, please call "support@netspeak.com" on your WebPhone or send e-mail to "support@netspeak.com" describing your problem. Support agents will reset your password once your identity is confirmed. If you enter an invalid password, your WebPhone will ONLY be able to call "sales@netspeak.com" or "support@netspeak.com". Network Parameter descriptions To assist you in understanding the other Network Parameters, lets look at Roger Wilco's Network Parameters: E-Mail address: rwilco@provider.net E-Mail Login: rwilco E-Mail Password ******* Password Confirmation ******* POP Server address: mailhost.provider.net SMTP Server address: mailhost.provider.net Roger has a dialup SLIP/PPP account to his Internet Service Provider (ISP) which has a domain name of "provider.net". Roger's E-Mail Login is "rwilco", which he defined when he established his Internet account with his ISP. The E-Mail login is used along with his provider's domain name to construct his E-Mail address: "rwilco@provider.net". His ISP's POP Server (retains e-mail sent to you by other users) and SMTP Server (used to send e-mail from you to other users) are both named "mailhost" which is used along with his provider's domain name to construct the POP and SMTP Server addresses: "mailhost.provider.net". If you do not know or are not sure of the values for some of these parameters, check your E-Mail program's (e.g., Eudora) setup screen, check your Web browser's (e.g., Netscape) setup screen, consult your Internet service provider or ask your network's system administrator if you intend to use WebPhone on a TCP/IP based network connected to the Internet. If you can only find your SMTP Server address, you can probably safely assume your POP Server address is identical. If you intend to operate your WebPhone on a LAN or WAN that is not connected to the Internet, your network probably does not have a SMTP or POP Server. If this is indeed the case, you should leave everything but your E-mail address field blank (see section 14. "Operating your WebPhone on a Network"). Note: WebPhone only uploads your User Information and E-mail Address to its Connection Server for connection and Information Assistance purposes only. It does NOT upload your E-mail Login and Password. Changing your E-Mail Address In the event you change your e-mail address (e.g., you change your Internet service provider), you will need to change your E-Mail address in the Network Parameters section of the WebPhone Configure window. A message will be displayed when your e-mail address change has been confirmed. 4. Finding someone to talk to If you must try WebPhone (webphone.exe) before perusing the WebPhone How to guide (wphowto.wri), you will want to talk to somebody. WebPhone comes with an integrated Information facility for accessing NetSpeak's Information Assistance (e.g., like calling 411 and asking the operator for someone's phone number). To access NetSpeak Information Assistance to find someone to talk to, perform the following with your WebPhone: 1. Press the [INF] button to open the Information dialog. 2. Check Only Parties Online (this is checked as default) 3. Enter your search criteria (more about search criteria below) 4. Press the Search button to begin your search. 5. Double click on the desired party returned from your inquiry to call them. 6. (Optional) Right click on a returned party to obtained more details 7. (Optional) Drag one or more of the returned parties to the Personal Directory window to save them. Make the search criteria as specific as possible to speed up the search time. You may also give WebPhone (wpsetup.exe) to a friend or colleague so you can communicate with them straight away. 5. Information search criteria The Information dialog allows you to enter the following search criteria: First Name Last Name Organization City State/Province Country Some details you should know: • Search criteria may consist of complete or partial data as well as the * and ? wildcard characters. * is any number of any character and ? is any single character. • The maximum number of parties returnable from an inquiry is 100. • If you cannot find a specific party then you can assume they do not have a WebPhone, or they have chosen not to publish their information in directory assistance. Examples To search for anyone in the United States: Select UNITED STATES in the Country field then press the Search button to begin your search. To search for anyone with a last name beginning with "Ga" at NetSpeak: Enter Ga or Ga* in the LastName field and NetSpeak in the Organization field then press the Search button to begin your search. 6. New Features WebPhone 3.0 adds the following new features over version 2.00/2.01: - Firewall support 7. Limitations of WebPhone 3.0 WebPhone Version 3.0 has the following limitations. To remove these limitations simply activate your WebPhone. See 8 for information on activating your WebPhone. · Only one line may be used · A maximum of 3 Phone Directory entries allowed · 3 received Voice-Mail messages can be retained · 1 custom OGM may be defined · Cannot send offline voice mail, but can receive offline voice mail · Cannot start a conference, but can participate in one 8. Purchasing WebPhone 3.0 To purchase WebPhone 3.0, use your Web browser and go to the NetSpeak Home Page at http://www.netspeak.com or call us on your WebPhone at sales@netspeak.com and provide your American Express, Visa or MasterCard information. NetSpeak will charge $49.95 plus applicable sales tax to your credit card, e-mail you a receipt and automatically activate your WebPhone within 24 hours. If you are not connected to the Internet (i.e., using WebPhone only on a LAN or WAN), call us at +1 561 998-8700 or send a check or money order for $49.95 plus applicable sales tax to NetSpeak Corporation, 902 Clint Moore Road, Suite 104, Boca Raton, Florida 33487-2846. 9. Hardware and Software Requirements You will need the following for WebPhone to operate properly: · an 80486-33 MHz or faster computer (75 Mhz Pentium required for TrueSpeech) · Win 3.1, Win 3.11, Win 95 or Win NT · at least 4 MB RAM · a 14.4 Kb or faster network communication link (14.4Kb must enable error correction), 28.8 required for Video · a Windows compatible sound card that supports 8 kHz or 11 kHz sampling · display mode of 256 or more colors (64k color or higher recommended) · 5MB or more of free hard disk space 10. NetSpeak Corporation We at NetSpeak Corporation wish to thank you for using WebPhone, the professional real time, full duplex, network based voice communication system for Microsoft Windows®. WebPhone is not just a state of the art Windows application that is easy and fun to use; it is a serious communications tool that will save you or your company significant amounts of money on long distance telephone calls. If you have should experience any problems, we recommend you first visit our web site at www.netspeak.com. Alternatively, report problems via email using the bug report form (bugrpt.txt). The bug report form asks you for a complete description of the bug and the events that transpired which lead to its occurrence. 902 Clint Moore Road Suite 104 Boca Raton, Florida 33487-2846 Telephone Numbers Tel. 561-997-4001 Corporate Offices Tel. 561-998-8700 Sales Department Tel. 561-998-8710 Technical Support Fax. 561-997-2401 WebSite http://www.netspeak.com E-mail addresses info@netspeak.com General info about WebPhone and NetSpeak Corporation bugs@netspeak.com WebPhone bug report form submission WebPhone Numbers sales@netspeak.com call this number on your WebPhone to activate your WebPhone support@netspeak.com call this number on your WebPhone for technical support 11. Installing WebPhone 3.0 To install WebPhone, run wpsetup.exe from Windows and follow the instructions. The installation program will prompt you to specify a directory into which it will create the WebPhone directory structure (described below); then create a WebPhone group under Start->Programs in Windows 95. The WebPhone group contains launch points for your WebPhone (Webphone.exe), the WebPhone User Manual (wpman.exe) and these release notes (wpnotes.wri). 12. WebPhone Directory Structure This is the WebPhone file structure created during the installation process: Files in the WebPhone directory: license.txt WebPhone license agreement wpnotes.wri release notes (this file) wphowto.wri How to Guide Webphone.exe WebPhone executable wpman.exe WebPhone User Manual WebPhone.cfg Configuration file WebPhone.dir WebPhone Directory database wphelper.exe Web browser helper application wpdb.dll database interface library wputil.dll WebPhone support DLL wpnls.dll WebPhone resource DLL wpgsm.cdc GSM codec DLL wptsp.cdc TSP codec DLL bugrpt.txt bug report form servers.lst WebPhone Servers list Files in the WebPhone\ogm directory: ogm.dir directory of custom outgoing messages default.wav default outgoing message xxxxxxxx.wav user defined outgoing messages (x = 0,1...9,a,b...f) Files in the WebPhone\vmail directory: vmail.dir directory of received voice mail messages Files in the WebPhone\vmail\in directory: xxxxxxxx.wav GSM encoded received voice mail messages (x=0,1...9,a,b...f) File in the WebPhone\vmail\out directory: xxxxxxxx.wav GSM encoded transmitted voice mail messages (x=0,1...9,a,b...f) Files in the WebPhone\sounds directory: badaddr.wav voice notification when invalid address used busy.wav sound for busy cnvtime.wav your restricted talk time expiration notification diradd.wav restricted directory entry addition notification error.wav voice notification when error occurs newvmail.wav voice notification when new voice mail arrives offline.wav voice notification when called party is off-line offlnvm.wav voice notification when called party is off-line and you can leave voice mail offlnum.wav voice notification like offline.wav except you can leave voicemail ogmadd.wav restricted ogm definition notification onhold.wav voice notification when placed on hold rcnvtime.wav remote party's restricted talk time expiration notification ring.wav ring sound for inbound call ringback.wav ring sound for outbound call vmreject.wav remote party's voice mail reception restriction notification webboard.wav default WebBoard audio hldmusic.mid default on hold MIDI music autoans.wav auto answer sound Libraries not installed but required by WebPhone to operate: mmsystem.dll Windows MCI library found in your windows\system directory. winsock.dll Windows sockets library usually found in your windows directory. 13. Operating your WebPhone on the Internet via a Dialup Connection In order to place and receive calls with WebPhone, it must use the sockets library winsock.dll (or equivalent) supplied with the dialer program (e.g., Trumpet WinSock, Windows 95 dialup networking, NetCruiser, NetChameleon, etc.) you use to establish your dialup connection to your Internet service provider. WebPhone may be started before establishing your Internet connection: you may operate all features of WebPhone (e.g., Personal Directory maintenance, V-Mail playback, etc.) except placing and receiving calls and obtaining Directory Assistance. Once you establish your Internet connection, WebPhone will allow these features. This same mechanism applies if you lose your Internet connection while WebPhone is operating; WebPhone notifies you of the network failure and disables only these functions. 14. Operating your WebPhone on a Network WebPhone will operate only on TCP/IP based networks and requires the presence of winsock.dll (or its equivalent) located in memory or in a directory in your PATH. If your network does not have a SMTP and POP server (which is most likely the case unless your network is connected to the Internet - see next section), WebPhone will only enable you to talk to other WebPhone users on your network. Without an Internet connection, you will - · only be able to place point to point calls using a party's IP address · be unable to talk to WebPhone users out there on the Internet · be unable to obtain Directory Assistance Not being able to place point to point calls using a party's e-mail address in a small network environment is actually no great loss since you probably know (or can easily find out) everyone's IP address on your network in the first place. Just enter the IP addresses of all the parties you wish to talk to into your Personal Directory and call them from there. On a large WAN, however, acquiring everyone's IP address is a more formidable task. If your company desires the ability to place point to point calls using a party's e-mail address, provide its own WebBoard announcements and provide its own Directory Assistance, contact NetSpeak at info@netspeak.com and inquire about a Business WebPhone System for your company. The Business WebPhone System consists of an Intranet WebPhone Server, WebPhone Automatic Call Distributor, Credit Processing Server, WebPhone Telephone Gateway and WebPhone Forum Server. 15. Operating your WebPhone on a Network connected to the Internet This is the best of both worlds. So long as your network uses TCP/IP for its communications and the Internet server on your network has a SMTP server and POP server, you can use all the features of your WebPhone and talk to all other WebPhone users on both your network and the Internet. 16. Audio Programs and your WebPhone Playing audio (WAV, MIDI, CD player...) through your sound card with another program while WebPhone is running is not a good idea and may prevent WebPhone from operating properly. When WebPhone requires control of the sound card (to play a sound effect or to allow conversation with a party) and the sound card is in use, it will attempt to terminate the sound being played. If WebPhone cannot gain control of the sound card, it will display a dialog box informing you "Sound Card Already In Use". If this occurs during an active conversation, the call will be placed on hold. Correct the problem (stop using the sound card with the other application) and take the call off hold to resume your conversation. 17. WinSock Programs and your WebPhone The dialer program you use to connect to your Internet service provider via your modem is a WinSock based application. It might be necessary to reconfigure it correctly for WebPhone to operate properly. We have tested WebPhone with most of the major Internet startup kits and dialer programs. We have found that most of them require no modification. If you have Trumpet WinSock, however, the following TCP/IP parameters should have these minimum values defined in the File -> Setup screen: MTU: 552 TCP RWIN: 2048 TCP MSS: 512 WebPhone uses three officially registered user port numbers: 21845, 21846 and 21847. In the remote event WebPhone informs you that one of its ports is in use by another WinSock application, you should identify the offending application and refrain from using it at the same time as WebPhone or start WebPhone before you start the other application. Please contact us at support@netspeak.com and give us the name and manufacturer of any such applications. WebPhone uses at most 7 sockets at any given time so you should not encounter any conflict with other WinSock applications with respect to the number of available sockets. In the extremely unlikely event WebPhone informs you it is out of sockets, identify the offending socket sucking application and refrain from running it at the same time as WebPhone or obtain a better winsock.dll that allows more sockets. 18. VGA Displays and your WebPhone Your WebPhone and the WebPhone User Manual require the use of a display mode with at least 256 colors. However, video image display quality will be poor in 256 color display modes, so we recommend you use a mode that supports at least 64K colors. Most display adapters with 2MB of video memory will support resolutions up to 1024x768 with 64K colors, and those with 1MB support up to 800x600 with 64K colors. We suggest you use the mode on your display adapter that provides the highest resolution available with at least 64K colors. If you are using a resolution of 256 colors, you may experience palette swapping (a transient change in colors) when you switch focus between WebPhone and the WebPhone User Manual or when you switch focus between WebPhone (or the WebPhone User Manual) and another Windows application that uses a large number of colors (such a Photoshop, Paintbrush, etc.). The faster your computer, the less noticeable this effect will be if it occurs. 19. Sound Cards and your WebPhone WebPhone will work with Windows compatible sound cards that support 8 kHz or 11 kHz sampling frequency. Important Information here: Make sure your Voice Activation Level (located in the WebPhone flip door), is set to recognize silence. Otherwise, the parties you call using half duplex sound cards will never get an opportunity to talk (they will always see LISTEN in their display and you will always see TALK in your display). If this happens, stop talking into the microphone and move the Voice Activation Level (VOX) slider to the right until the VOX meter displays Silence and you see the red bar. Now verify the VOX enunciator displays Speaking and the red bar disappears (covered by the green bar) only when you talk into the microphone. Most Windows compatible sound cards enable WebPhone to allow you to control their microphone and speaker volume via the MIC and SPK controls on the flip door. However, some do not and if you have such a sound card, you may be able to control the microphone and speaker volume from a mixer application that may have come bundled with your sound card. If you do not have such a mixer application (as is the case with most inexpensive 8 bit sound cards), you can probably control the speaker volume with a dial on the back of the sound card. If no dial exists, you may be able to control the speaker volume only by adjusting the volume controls on your speakers and you probably have no control over the microphone volume. If this is the case, it is probably time to get a new sound card. If you are running WebPhone on Windows 95 or Win NT, you may not be able to control your microphone volume with the MIC control on the flip door (this is dependent upon the sound card you have installed). If you cannot adjust your microphone with the MIC control on the flip door, use the Configure Sound Card Devices screen to select the correct microphone volume device. You will obtain superior audio performance if you enable your sound card's automatic gain control (AGC) via the mixer application bundled with your sound card. If you have an 8 bit sound card you may not have AGC. If you do not have AGC but still have control over the input (recording) and output (speakers) gains, increasing the gains to 2x or 4x may improve the audio performance. WebPhone version 3.0 enables you to select the sound devices to use for your microphone and speakers. Therefore, if you have more than one sound device driver installed and your microphone and/or speakers are not operational, use the Configure Sound Card Devices screen to select the correct sound devices. 20. Modems and your WebPhone If you have a modem connection (dialup) to your Internet service provider, make sure your modem has error correction and data compression enabled (this is the default for almost every modem we know of). If your 14.4 kb modem does not support data compression (you have an ancient modem), you and the parties you talk to will not obtain the audio performance that is possible using data compression. To verify your modem has error correction and data compression is enabled, consult your modem's documentation. Bandwidth and your Answering Machine If you have a 14.4Kb modem and have your answering machine enabled, when you are talking to a party on a Line and one or more parties call and engage your answering machine (you fail to answer the calls in time), your answering machine will play an OGM to each of the parties in the background. This will degrade the audio performance of your conversation. It is recommended that you disable your answering machine while talking on your WebPhone. If you have a 28.8Kb modem this situation is not significant until you have 2 or more simultaneous calls being serviced by your answering machine while you are talking on your WebPhone. 21. WebPhone Databases WebPhone maintains 3 databases: The WebPhone Directory database is located in the file: webphone\webphone.dir The database of custom OGMs is located in the file: webphone\ogm\ogm.dir The database of received V-Mail is located in the file: webphone\vmail\vmail.dir We recommend backing up these database files and the WebPhone Configuration file (webphone\webphone.cfg) periodically in case it becomes necessary to reinstall the WebPhone. 22. How your WebPhone works As you speak into the sound card's microphone, WebPhone samples the incoming audio signal at 8kHz or 11kHz at 8 bit or 16 bit samples per second (e.g., 8 kHz - 8 bits/sample on 8 bit sound cards and 16 bits/sample on 16 bit sound cards), compresses the raw audio signal, encrypts the compressed audio, then transmits it in packets via TCP/IP over your communication link to another WebPhone which receives the packets of compressed audio, pieces them together, decrypts the compressed audio, decompresses the audio, then sends it to the sound card's speaker on that WebPhone's computer for the other party to hear. WebPhone is able to provide you with better than telephone quality audio due to the fact WebPhone samples the audio signal at a greater frequency and bit depth (more audio information per unit time) than most conventional telephone systems. The degree of signal loss is so small, the decompressed audio signal still contains more information than the conventional telephone audio signal. 23. GSM and TrueSpeechÔ audio codecs GSM and TrueSpeech are standardized audio compression and decompression algorithms that WebPhone employs to provide you with real time audio communications when used over a 14.4Kb or faster communications link. Data compression must be enabled when using GSM and a 14.4Kb modem connection for real time performance. TrueSpeech, a product of DSP Group, Inc., is WebPhone's codec of choice when WebPhone is used on a Pentium/80586-60MHz or faster PC. The TrueSpeech codec compresses 8kHz, 16bit audio 15:1 for a transmission rate of 8.5K bits per second (NetSpeak's enhanced GSM transmission rate is about 12K bits per second). 24. Half Duplex vs. Full Duplex Half duplex mode is like talking on a conventional speaker phone or walkie-talkie: you talk and the other party listens, then the other party talks and you listen. Actually, it is a great way to enforce proper conversation etiquette, yet it is not the usual way we communicate. Full duplex is the natural way to converse: the talking parties can both talk and listen at the same time, and are free to interrupt each other at any time. If you do not have a sound card that can input audio from the microphone and output audio to the speakers at the same time, WebPhone will operate in half duplex mode. The obvious solution to this problem would be to rush out and buy a full duplex sound card at your local computer store. An alternative solution to obtaining full duplex communications is to put another conventional half duplex sound card in your computer. This is not a task for those of you who are uninitiated in the ways of IRQs, DMAs and I/O base address settings (if you did not understand this last sentence, this means you). We do not recommend this approach. If you do wish to pursue this approach, you will need to attach your microphone to one sound card and your speakers to the other. To determine which sound cards WebPhone is using for your microphone and speakers, open the flip door and set your Voice Activation Level. If you do not observe voice activity while speaking into the microphone, swap your microphone and speakers between the two sound cards or swap the sound devices in the Configure window in Configure Sound Card Devices section. If you have a Labs' SoundBlaster 16 or AWE32 sound card, direct your Web browser to http://www.creaf.com and download the full duplex driver. This will enable your SoundBlaster card for full duplex operation. 25. Troubleshooting Received audio is delayed and choppy This may happen if you have a bad connection to the Internet and/or you are talking during a heavy traffic period on the Internet (slow packet transmission because of diminished available bandwidth). This is not a problem with WebPhone but a natural phenomena associated with the Internet. If this is the case, try reconnecting to the Internet or call at another time, or see "Advanced audio controls" below. This may also happen if you are talking to a party who is using a 80486 based PC and a 14.4Kb modem that does not have error correction and data compression enabled. Instruct them to enable error correction and data compression to resolve this problem. If their modem does not support data compression, it is time for them to acquire a new modem (get a 28.8Kb modem this time). You cannot hear the remote party If WebPhone always displays TALK and never displays IN USE or LISTEN, then you must raise your Voice Activation Level (the VOX slider in the flip door) so WebPhone can detect silence and allow the remote party to talk (this is would not be the case if both you and the remote party have full duplex sound cards). If this is not the case and WebPhone displays LISTEN when you would expect to hear something from the remote party, check your Speaker volume on the flip door and in your sound card's mixer application (if it came with one). If you are running Windows 95, use the Volume Control dialog. If you still cannot hear the remote party and WebPhone does not periodically display LISTEN, the remote party's Voice Activation Level or MIC volume is not set correctly. If this is indeed the case, there is not a lot you can do about it at this time except try to reach to party via e-mail or conventional telephone and tell them to adjust their MIC and/or Voice Activation Level. See next section. The remote party cannot hear you Refer to the previous section. If WebPhone always displays LISTEN, the remote party's MIC volume is too high and/or their Voice Activation Level is set incorrectly so their WebPhone cannot detect silence and is constantly transmitting (not giving you an opportunity to talk). If this is not the case and WebPhone displays IN USE but never TALK when you speak into the microphone, increase your MIC volume and check your Voice Activation Level to verify WebPhone can detect your voice. If WebPhone does display TALK when you speak into the microphone and LISTEN when the remote party speaks and the remote party still cannot hear you, the remote party's speaker volume is probably not set correctly. If this is indeed the case, there is not a lot you can do about it at this time except try to reach to party via e-mail or conventional telephone and tell them to raise their speaker volume. You obtain the WebPhone Error: Cannot access your sound card driver! WebPhone 3.0 attempts to use the first sound card driver it finds installed in Windows. If you have more than one sound card driver installed, select the correct driver under Configure Sound Card Devices. Advanced audio controls WebPhone 3.0 provides two additional controls that can be used to improve audio quality under certain circumstances. They are known as "VOX Delay" and "Spkr Delay" and will appear in the flip door if you type "sliders=on" in the WebPhone number and press SND. These controls will disappear when you type in "sliders=off" and press SND. The speaker delay setting specifies how long WebPhone will wait once audio is received before it begins playing. Increasing the speaker delay will result in a longer elapsed time period from when the person you are talking to says something until you hear it, but increases the likelihood that what they said will be played back continuously without breakup. If you are experiencing choppy sound quality, try increasing the speaker delay; if you are experiencing too long a delay in hearing the other party, try decreasing the speaker delay. The speaker delay ranges from a minimum of zero seconds (no delay) to a maximum of five seconds, with a default setting of 125 milliseconds. The VOX delay setting controls the length of time for which WebPhone must detect silence before it will stop sending audio data. This setting is useful under some conditions where the other party is hearing clicking or "cutting out" of what you are saying. If people you are talking to hear portions of words cut off or clicking between words, try increasing the VOX delay; if it seems to take too long before the other party can talk after you finish talking, try decreasing the VOX delay. The VOX delay ranges from a minimum of 50 milliseconds to a maximum of two seconds, with a default setting of 500 milliseconds. For additional information, see the NetSpeak home page, at http://www.netspeak.com. 27. Acknowledgments WebPhone is a trademark of the NetSpeak Corporation. Chameleon is a trademark of NetManage, Inc. Creative and AWE32 are trademarks, and Sound Blaster is a registered trademark of Creative Technology Ltd. Eudora is a registered trademark of the University of Illinois Board of Trustees, licensed to QUALCOMM Inc. NetCruiser is a trademark of NETCOM On-Line Communication Services, Inc. Netscape and Netscape Navigator are trademarks of Netscape Communications Corporation. Pentium is a registered trademark of Intel Corporation. Photoshop is a registered trademark of Adobe Systems Inc. TrueSpeech is a registered trademark of the DSP Group, Inc. Trumpet is a trademark of Trumpet Software International Pty Ltd. Windows is a registered trademark of Microsoft Corporation. All other products mentioned herein are trademarks of their respective owners and are hereby recognized as such.