Connecting your equipment to earth ————————————————— Secure your computer and modem against thunderstorms and other electrical problems. Securing the electric outlet in the wall is not enough. Problems can also enter through the telephone line. Thunderstorms have sent electrical pulses through the telephone line destroying four modems, three PC-fax cards, one mother board, and at least one asynchronous communication port. To prevent this from happening to you, disconnect electrical and telephone cables from your equipment during thunderstorms.
The communications program ————————————— A powerful communications program is half the job. In my case it's the whole job. Most of my work is done automatically. The communications program will help you with the mechanical transportation of data in both directions. It lets you store incoming information for later use and reduces the risks of errors. Here are some items to consider when shopping communications program: * Seriously consider buying automatic programs ('robots') for access to individual online services, even if that means having to use several programs for different applications. (Read chapter 16 for more details.) * Menus and help texts are important for novices, and in environments with "less motivated personnel." Advanced users may find it boring. * Ability to transfer data without errors. The program should have transfer protocols like XMODEM, Kermit, XMODEM/CRC, YMODEM and ZMODEM. The XMODEM protocol is the most commonly used. You need these protocols if you want to transfer compiled computer programs (e.g., .COM and .EXE files). They are also used when transferring compressed files, graphics and music files. * Does it let you tailor it to your taste/needs? Some programs let you attach batches of commands to function keys and keypress combinations. For example, by having your computer call your favorite online service by pressing the F1 key. * Does it let you "scroll back" information having disappeared out of your screen? This may be useful when you want to respond while online to an electronic mail message. The sender's address and name, which you need to respond, have scrolled off the screen. If you cannot review the "lost" information, you may have to disconnect and call back later to send your mail.
Connecting to the online service ———————————————— The first couple of times, most people think that it is very difficult. Soon it becomes a simple routine. On some computers, you just press a key, and that's it. On others, you have to call and press, and watch, while things are happening. Cheap is often a synonym for more work. If you have a dumb modem connected to your personal computer, these are the typical steps that you must take:
(1) Start your communications program and set it up, e.g., with
2400 bps, 8 bits word length, 1 stop bit, no parity. (This
is the most common setup.) Then set the program to "online."
(2) Call the number (e.g., +47 370 31378)
(3) When you hear the tone from the remote modem in the phone,
press DATA to get the modems to connect to each other
(i.e., to start to "handshake").
(4) A front panel indicator may tell you when the connection
has been set up. You can start transferring data.
With an MS-DOS computer, an automatic modem and a powerful program preset for the job, the steps may be as follows:
(1) Start the program and display the telephone directory.
Select a service from the list by pressing a number.
(2) The modem will call automatically to the service. When
CONNECT has been established, your user identification and
password are sent at the prompts for such information. When
this is done, you are free to take control.
With an MS-DOS computer, TAPCIS, and an intelligent modem, you start by selecting forums and services to access on CompuServe. Enter 'o' to upload and download programs, or 'n' to have it fetch new message headers and messages. TAPCIS will dial the number, do the job, and tell you when it's done. Meanwhile, you can go out to look at the moon, or sing a song.
Getting started with Procomm —————————————— Procomm is cheap and probably the most commonly used communications program for MS-DOS computers. It's been like this for many years, though there are many better and cheaper alternatives. An older version of the program (version 2.4.2) is still being distributed through bulletin boards all over the world. You may give copies of this version to anyone. The requirement is that you pay a contribution of US$25 to the vendor if you like it and start to use it. Procomm is simple for novices, can automate the work for advanced users and be run on almost any MS-DOS computer. Here is some of the features: Press ALT-F10 for a pull-down window text listing features and commands. Press ALT+D to call a number, update the telephone directory, or select a script file for autologon to a service. Procomm can emulate (pretend to be) different terminal types, like IBM 3101 and DEC VT-100/VT-52. Most services covered in this book may be well served with the setting ANSI.BBS. It let you use both dumb and intelligent Hayes-compatible modems. If you have the latter, select numbers from the telephone directory for autologon. If the number is busy, Procomm can call back until you can get through. You can define macros to automate your work. You can have one keystroke send your user identification, another for your password, and a third key to send a sequence of commands. Macros make your communication faster and safer. You can write script files to automate the online work further. You can transfer text files and binary files using automatic error detection/correction protocols, like XMODEM, YMODEM, Telink and Kermit, at speeds from 300 to 19200 bps. Adding external protocols like ZMODEM is relatively simple.
Appendix 3:
Online with the world =====================