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QPQ—QàQ*RmR¬R¯RÛRïR6S€SÊSTT`TªTôT3U6UcUeUgUIntroduction The Tutorial contains an overview of the use of the SETUP program to prepare for conferencing, and of the use of the resident commands once conferencing begins.  This information appears in the screens that fol- low this one in the introductory sequence.  The remainder of the Tuto- rial contains information on the individual conferencing commands. Additional information on SETUP is provided by the context-sensitive help.  The Tutorial is oriented primarily to operation with a modem. The differences for operation over a wire connection are obvious, and are summarized by simply noting that a separate line is used for voice.   It is suggested that you read through the remaining screens of this  introduction, followed by those of the remaining Tutorial Menu choices. Then, read the help screens for the SETUP program features.                            - page 1 of 9 - The Transmit Command The Transmit command causes your computer to go online for conferencing in the Transmit mode.  That means that you will be in control of the application that is running (or DOS), and your keystrokes will appear in the Keystroke Displays.  If you execute the Transmit command, the other conferee must execute the Receive command.   The process of going online begins with your modem going off hook.  If the program is set to provide hangup delays, your computer will display the message "hang up now" and will introduce a small delay so that you can easily hang up your phone before the modems begin to connect.  The message "connecting" indicates that your modem is attempting to connect to the other modem.  A successful connection is announced with the mes- sage "transmit", at which point you are online and in control.                            - page 1 of 3 - The Receive Command The Receive command causes your computer to go online for conferencing in the Receive mode.  That means that the other conferee will be in control of the application that is running (or DOS).  The keystrokes that they use are available for your review in the Keystroke Display, which will make it easier for you to follow the program activity.   You may also use the resident conferencing commands at any time.  For example, you may use the cursor keypad area commands to change the loc- ation and size of the Keystroke Display on your screen (or remove it). You can use the Request command to ask for control, send a note with the Note command, or go offline with the Suspend or Voice commands.                              - page 1 of 2 -  The Over Command The Over command is used, during a conferencing session, to transfer the control of program operation from the current Transmitter to the current Receiver.  That is, the Transmitter and Receiver exchange roles.  Only the current Transmitter can execute the Over command.  The Receiver can use the Request command to ask for the transfer of control at any time.   When the Over command is executed, the new Transmit and Receive modes on each side are announced by corresponding messages.                              - page 1 of 1 -     The Request Command The Request command is used by the Receiver, during a conferencing ses- sion, to ask the Transmitter to transfer control through use of the Over command.  The Request command does not interrupt program operation, but simply displays the "request" message on the Transmitter's screen.  This gives the Receiver a way of letting the Transmitter know that he has an input at that time without the need for going offline or sending a note.                              - page 1 of 1 -       The Suspend Command The Suspend command can be used at any time by the Transmitter or Re- ceiver to suspend the conference and force both computers to go offline. If the program has been set to provide pickup warnings, your computer will display the message "pick up phone & hit Esc key" and will wait for the keystroke before it hangs up your modem.  Once the modems have hung up, of course, you may use your phones to talk.   When you execute the Suspend command, your computer goes offline imme- diately, regardless of your current mode or concurrent activity on the other computer.  Unlike the Voice command, which keeps both computers locked together during the offline period, your computer will be under your full control in the Suspend mode.  In fact, before you first go on- line for a conference, you are in the Suspend mode.  Thus, the Suspend                            - page 1 of 2 - The Voice Command The Voice command, like the Suspend command, can be used at any time by the Transmitter or Receiver to force both computers to go offline.  The modems will hang up, giving you a pickup warning if desired, and you can use your phone to talk.   The principal difference between the Voice and Suspend modes is that in the Voice mode both computers are locked.  That is, neither computer will respond to keystrokes other than the conferencing commands.  Also, before going offline in the Symmetric Mode, any pending actions are started on both computers, so that the computers are synchronized and ready to resume conferencing when you switch back from voice to data.                              - page 1 of 2 -  The Continue Command The Continue command is intended to be the usual means for going back online from the Voice mode.  In this case, the two computers automati- cally resume their previous Transmit or Receive status.  Thus, the con- ference picks up exactly where it left off when the Voice command was executed.  The sequence of events in going online with the Continue command is otherwise identical to that for the Transmit or Receive com- mands.  See those discussions for additional details on these events and the associated messages.   The Continue command cannot be used to go online from the Suspend mode, since in that case previous Transmit/Receive modes are not defined. If you should try to use the Continue command while in the Suspend mode, a message to that effect is displayed.                            - page 1 of 1 - The Note Command The Note command can be used by either the Transmitter or Receiver to send a note to the other conferee.  The Conferencing Windows on both computers will switch to the Note Display mode and the Window will pop up if it is currently off screen.  The note sender's display will have a blinking cursor at the right end where new characters are entered.  As the note is typed, it scrolls across the display to the left.  Correc- tions can be made with the backspace or delete keys.   Notes can be typed even while the application is running.  The two con- ferees can have a note conversation by executing the Note command on either side to turn the note channel around.  Typing a carriage return inserts an ellipsis (...) into the note, used to indicate that a re- sponse is expected.  A repeated Note command toggles the Note mode off.                             - page 1 of 1 - The Transmit Command (Continued) A problem can arise if your modem was left in the online state by a previously used communication program, since then it will not respond to modem commands as required.  Similar symptoms result if your modem has not been turned on.  In these cases, the program attempts to reset your modem to the command state, and displays the message "resetting". If the resetting is successful, the connection attempt will continue. Otherwise, the program will stay in the Suspend mode, and you will be  instructed to manually "turn on or reset your modem before continuing".   If you fail to connect, it will probably be because the other conferee has accidently executed the Transmit command instead of Receive, or they may need to reset their modem.  Finally, although the program al- lows a few seconds to elapse between the online commands at the two                            - page 2 of 3 - The Transmit Command (Concluded) ends, if too much time elapses the connection attempt is aborted.  In any of these cases, the program stays in the Suspend mode and displays the message "no carrier received from other modem".  If you have set the program to provide pickup warnings, the modem will not hang up un- til the message "pick up phone & hit Esc key" is displayed and you type the key.  A brief conversation with the other conferee will usual- ly reveal the source of the problem, and you may reissue the commands.   Your modem must be Hayes-compatible to use this program.  If the mes- sage "modem compatibility problem" is displayed, your modem is not responding as expected.  Check that you have the modem set to operate in its Hayes-compatible mode.                              - page 3 of 3 - C O  C O M P U T E                             T U T O R I A L   Select the topic to be reviewed by making a choice from the menu in the usual way.  That is, use the left and right arrow keys to highlight the desired choice and strike the return key, or simply strike the first letter of the name.  It is suggested that you review the topics in the order in which they appear in the menu.  When you are finished with the Tutorial, use the "Exit" choice to return to the Main Menu.   Topics are generally covered by a series of pages.  To go to the next page in the series, strike the F1 or the PgDn key.  Return to the previ- ous page with the Esc or the PgUp key.  Any other keystroke returns you to the Tutorial Menu.  The Receive Command (Concluded) The process of going online in the Receive mode is the same as for the Transmit mode.  Of course, if you use the Receive command to go online, then the other conferee must use the Transmit command.  Refer to the Tutorial screens for the Transmit command, if you have not already done so, for a discussion of the subject of going online for conferencing.                              - page 2 of 2 -        The Suspend Command (Concluded) command can be used to regain control of your computer if conferencing is disrupted for any reason (such as if the phone line disconnects).   Also, the Suspend mode can be used to perform independent actions on the two computers if required during a Symmetric Mode conference, for ex- ample if a file needs to be loaded from different disk drives in the two cases.  Since it is possible for the computers to get out of synchroni- zation during a suspend interval, care must be taken to insure that synchronization is reestablished if the conference is to be restarted in the Symmetric Mode.                              - page 2 of 2 -   The Voice Command (Concluded) Thus, the Voice mode is intended to be the usual means for switching from online to offline during a conference.  To go back online from the Voice mode, you may use the Transmit or Receive command, just as in go- ing online from the Suspend mode.  However, you must remember not to both use the same command.  The Continue command provides another option which may be preferred for going online from the Voice mode.  Since you both use the Continue command to go back online, there is less opportu- nity for error.  See the discussion of the Continue command for addi- tional details.                              - page 2 of 2 -    What is Conferencing? Conferencing consists of running DOS or a DOS application program with computers on either side of a phone connection.  COCOMPUTE gives you the option of running at the same time on both computers, or running in a Terminal/Host configuration.  In both cases, the two computers show the same displays to the conferees, and the conferees can take turns controlling the two computers.  The one in control is called the "Transmitter" while the other is called the "Receiver".  By using an Over command, the Transmitter can transfer control at any time.   The keystrokes used by the Transmitter can be viewed by the Receiver in COCOMPUTE's Keystroke Display, making it easier to keep track of the program activity.  Also, since conversation will be desirable during conferencing, COCOMPUTE facilitates toggling between voice and data.                            - page 2 of 9 - Getting Ready to Conference A COCOMPUTE conference always begins with a voice conversation. Discuss the conference goals and which application programs and files will be used.  You must both load the SETUP program and install the resident conferencing commands.  For Symmetric Mode conferencing, you must both have copies of the application programs and files.  Files may be transferred with the SETUP program if necessary.   You may now exit from the SETUP program and load the first application program.  You may also want to load the first data file before going online.  For Symmetric Mode conferencing, make sure that you are both at the same point in program operation.  For Terminal Mode operation, this is not necessary.  Finally, decide who will be the first Trans- mitter and go online.                            - page 3 of 9 - When You Are Conferencing The conferencing commands are executed by holding down the trigger key(s) while striking one of the command keys.  The default trigger keys are the left shift and Alt keys, and both of them must be pressed to put your computer in the "triggered" or "command" state.  You may choose other keys to serve as trigger keys (and may choose to use only one trigger key) by changing the corresponding program settings.   When you enter the command state, a small "Command Display" will ap- pear on your screen, signalling that the computer is ready to receive a conferencing command.  Each command is executed simply by striking the first letter of the command name, for example "o" for the Over command. The available conferencing commands enable you to go online, transfer computer control back and forth, switch between data and voice, etc.                            - page 4 of 9 - The Command and Message Display When you strike the command key, a series of responses will appear in the Command Display.  These responses acknowledge the command and then report the result of the command.  For example, if you were the Trans- mitter and you executed the Over command, the Command Display would briefly show the word "over" to acknowledge the command, and then would show the flashing message "receive" to indicate that the trans- fer of computer control had occurred, and you were now the Receiver.   The same display is also used to show other messages that are required from time to time.  For example, if line noise causes a transmission error, the message "line noise" is shown, followed by "corrected" when the error is repaired.  If an erroneous command key is struck, the message "invalid" is displayed.                            - page 5 of 9 - Menu-Driven Operation The conferencing commands can also be operated in a menu-driven mode. The Menu command pops up a menu that is status-sensitive; it only in- cludes choices for the commands that are valid for your current status. The application will continue to run while the menu is on the screen. Choices from the menu are made in the usual way.  The MenuOff choice always removes the menu.  The "F1" key will display a short descrip- tion of the indicated menu choice.   For one-handed operation, tap the trigger key(s) twice to pop up the menu, then hit the command key.  This may be useful if you are holding your phone receiver in the other hand.                              - page 6 of 9 -  The Keystroke Display The Keystroke Display is shown in the same area on your screen as the Command Display.  When the conferencing commands are resident, every keystroke that is seen by an application program running on your compu- ter is captured in the Keystroke Display.   The position and size of the display is controlled through a set of resident commands executed with keys in the cursor keypad area.  The PgUp and PgDn keys toggle the display on and off, while the arrow keys (with End key if desired) move the display around on the screen.  The plus and minus keys make the display length longer or shorter.  These commands make it possible for you to place the display in a part of the screen, such as a window margin, where it is out of the way.                              - page 7 of 9 - Additional Messages The primary purpose of the Keystroke Display is to help the Receiver keep track of the Transmitter's actions in controlling the application program.  Along the same lines, messages are displayed if the Trans- mitter executes a pause (Ctrl-Num Lock), a subsequent resume from pause, a break, or a reboot.  In the latter case, a shrinking Command Display is shown on both computers.  If any key is struck before the display disappears, the reboot is cancelled on that computer.  The Keystroke Display and these other messages are also shown when you are in the Transmit and Suspend modes.   Still other messages occur in connection with the process of going on- line.  These are covered elsewhere in the Tutorial.  Some long messages are left on until a key is struck, so that they are easier to read.                            - page 8 of 9 - If Problems Occur Loss of synchronization between the computers will occasionally occur during Symmetric Mode conferencing.  This may be due to use of differ- ent versions of an application program on the two computers, or use of files stored on different drives or directories on the two computers. Also, although COCOMPUTE uses a sophisticated protocol to detect and correct any errors caused by line noise, perfect error control is impractical if not impossible.  If the message "corrected" does not appear after "line noise", you should suspect an uncorrected error.   If you suspect that a loss of synchronization has occurred, simply switch from data to voice and discuss the situation.  If necessary, temporarily suspend conferencing and take independent action to get back into synchronization.  Then, go back online.                            - page 9 of 9 -                The Terminal Command The Terminal command toggles the conference from the Symmetric Mode to the Terminal Mode.  Either the Transmitter or Receiver can execute the command, in which case their computer configures itself as a Termi- nal while the other computer becomes the Host.  The application program or DOS runs only on the Host, but can still be operated by both con- ferees.  All of COCOMPUTE's other features are still available.   When the command is executed, the Terminal computer's screen is blanked and a screen image is transferred from the Host.  This screen image is kept updated so that the two screens remain the same.  If the Host is running in color while the Terminal is running in black and white, a color translation is performed.  This translation is usually effective, but for some programs the Host may want to run in black and white.                            - page 1 of 2 - The Terminal Command (Concluded) The Terminal Mode does not support graphics operation.  If a conferee attempts to enter the Terminal Mode when using graphics, the message "not permitted in current screen mode" is displayed.  Similar messages are displayed if the intended Host is using graphics.   Once toggled to the Terminal Mode, the conference stays in that mode until the Suspend command is used by either conferee.  When the Suspend command is used, the state of the Terminal computer is restored to the one that existed before the Terminal command was first executed.  Then the conferees may go back online in the Symmetric Mode if desired.                              - page 2 of 2 -   The Clean Command In order to transfer screen changes with the maximum speed possible, error control coding is not used in sending the screen updates.  The Clean command is provided for those rare occasions when line noise pro- duces a noticeable degradation of the Terminal display.  When the Clean command is executed by the Terminal computer operator, the Terminal dis- play is blanked and a new screen image is transferred from the Host.                              - page 1 of 1 -       The Wait Command When the Host conferee is the Transmitter, he may unintentionally type too fast for the screen update process to keep up.  In such cases, the Terminal conferee can use the Waits command to insure that the Host sends a complete screen update before another key is struck.   With Waits toggled on, the Host computer displays the message "wait" until it is certain that any screen changes have been sent.  Any keys struck during this period are ignored by the Host computer.  This slows down the Host computer significantly, as expected.  Thus, the Waits fea- ture should be used only when absolutely necessary.  The Terminal conferee can toggle Waits off by repeating the Waits command.                              - page 1 of 1 -  The Quit Command The Quit command may be used to remove the conferencing commands from your system without rebooting.  This can be useful if you want to reload the commands with a change in the settings, or if you have finished con- ferencing but want to keep the results in memory for further processing.   When you execute the command, the Command Display will begin to rapidly shrink and will disappear, along with the resident commands.  If you ex- ecute the Quit command accidently, or just change your mind, hit any key before the display is gone and the command will be cancelled.                               - page 1 of 1 -    