The Online World

by Odd De Presno

- Practical data communication
- Your first trip online
- Typical pitfalls and simple solutions
- Receiving (downloading) letters, text and programs
- Sending (uploading) letters, text and programs

Practical data communication —————————————— The first thing novices want to know is how to set up the modem and computer for communication. This may take more time than expected and often seems complex for the uninitiated. You can save yourself much sweat and frustration by asking others for help. To set up your equipment for communication is a one time job. Once done, you can almost forget what you did and why. There are so many different modems, computers and programs out there. We just cannot give practical advice on the use of all of them in one short appendix. Instead, we will use one example. Your job is to "translate" the text into a terminology that fits your tools. Once your system is set up for communication, your first job will be to find what keys to press to get the job done. How you use your communications program may vary considerably from our example. In general, however, it will be the same for most people doing manual communication. Once online, the environment is the same for all users. If you plan to use automatic communications as explained in chapter 16, this chapter may not be that important. Your program will do the job for you. Still, take a few minutes and browse through the text. It may enable you to handle unexpected problems better. Our example assumes that you have an MS-DOS computer. Not because this is the best microcomputer in the world, but because there are more of them than anything else. We assume that you have an external, intelligent Hayes-compatible modem and the communications program Procomm (version 2.4.2). In this example, your modem is tested by calling my bulletin board at +47 370 31378. Not because this is the best board in the world, but because I have full control over how it looks and feels for those using it.

Assembling the equipment ———————————— You have the modem, the cable (to connect your modem with the computer), a phone cable (to connect your modem with the phone or the wall jack), and a communications program. Check that the modem's power switch is off. Place the modem by the computer, and plug the power supply cord (or the power adapter cord) into the AC wall socket. Switch on the modem.

Do NOT use 115-volt equipment in 250-volt sockets!

Connect modem and computer using the modem cable. There may be several optional sockets on the computer. These are usually marked RS-232, COMMS, MODEM, or just nothing. The connector may be of a flat 25-pins, 9 pins, or a round 8-pins type. Use communication port number 1, 2, or whatever else is available for this purpose. If you have several options, and the socket for communication port number 1 seems free, use this. If not, try one of the others. Next, connect the modem to the telephone line. If in luck, the modem came with a phone cable that works with your setup. If so, it is simple: 1. Disconnect the phone cable from the telephone. Insert the modular plug into the right jack on the modem. This jack is often marked with the word LINE, with a drawing of a modular wall jack, or another understandable icon. 2. You may be able to connect the phone to the modem using the phone cord that came with the modem. This may allow you to use the phone for voice, when the line is not busy with communication. (You may have to make changes in this cord to make it work with the connected phone.) This concludes the technical assembly of your equipment. Next step is to install the communications program. When this is done, we will check it out.

Installing the program ——————————— Let us assume that you have received Procomm on a diskette, and that it is set up with its default configuration. PROCOMM.EXE is the program. The other files have no importance here. Enter Procomm and press ENTER. Our first task is to prepare it for communication: If you are using a monochrome display, use the command

PROCOMM /B

The program will greet you by a welcome text. At the bottom of the screen, the message "CREATING SYSTEM FILES" may appear (if these have not been created yet), followed by a message from the creators of the program. Press ENTER when you have read the text. The screen will be blanked, and a text line will appear at the bottom. Now is the time to test if the technical installation has been successful.

The dial tone ——————- Lift the receiver from the phone and check if you can hear the dial tone. If you can, turn the pages to "Does the computer have contact with the modem?" If you hear nothing, there are several possible causes: * The phone is not working. This is easily checked. Disconnect it from the modem, and connect it to the wall (using the original cable!). If you get a dial tone now, then the phone is in order. * The cable between the modem and the wall jack may be broken, or wrongly configured. To check this, we must first check the connection between the modem and the computer. Once we know that the connection between the modem and the computer is in order, we can use the modem to check our phone cable. * The cable between the modem and the phone may be in disorder. For example, the modular phone connector may have a cabling that differs from what is assumed in your country. If there is no dial tone, then the cable between the modem and the telephone must be repaired, or replaced.

Does your computer have contact with the modem? ———————————————————————- When you first use Procomm, it is preset for communication at 300 bps, use of port 1 and ANSI-BBS. (The control line at the bottom of your screen should read: ALT-F10 HELP, ANSI-BBS, HDX, 300 N81, LOG CLOSED, PRT OFF, CR and CR.) * If your modem is unable to communicate at 300 bps, you must change the setup. Press ALT-P (keep the ALT key down while pressing P) to get the menu LINE SETTINGS. Choice 9 gives 2400 bps with 8 bits word length, no parity and one stop bit. This is a common setting. Select 24 "Save changes" to make the setting permanent. * If you know that your modem is not connected to the computer's port number 1, then change this from the same menu. Choice 21 gives COM2, and choice 22 gives COM3. If you don't know what communication port the modem has been connected to, you have to find out by testing. Do this by entering (i.e., sending to the modem) the characters AT. Now, the modem is supposed to respond with an OK (or with the number "0," if the modem is set to reply with numeric codes). If you get an "OK" or a "0" on your display, continue reading from "Does the modem have contact with the phone line?" If you can see "AT" on your screen while you enter it, you have contact with the modem. This is true even if it does not send any confirmation. The modem may have been instructed not to confirm. If you see the AT characters, read from "Does the modem have contact with the phone line?" If there is no contact between the modem and the computer, the screen will remain blank at all times. Your problem may be the cable, your choice of modem port, or the modem setup. First, check if the modem is switched on (the power switch), and that the plugs are firmly in the jacks. Then let's check the modem. It may have been set not to respond to your commands. Let's try to change that. Enter the following command, and press ENTER: