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The Online World resources handbook

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radio and television reception.<br />

At this point, some discover that there is no place on the PC to attach the cable.<br />

Look for a serial port at the rear of your machine, labeled MODEM,<br />

COMMUNICATIONS, SERIAL, or with a phone symbol.<br />

If you find no suitable connector, you may have to install an asynchronous<br />

communication port in the box.<br />

Connecting your equipment to earth<br />

Secure your computer and modem against thunderstorms and other electrical problems.<br />

Securing the electric outlet in the wall is not enough. Problems can also enter through<br />

the telephone line.<br />

Thunderstorms have sent electrical pulses through the telephone line destroying<br />

four modems, three PC fax cards, one mother board, and at least one asynchronous<br />

communication port.<br />

To prevent this from happening to you, disconnect electrical and telephone cables<br />

from your equipment during thunderstorms.<br />

<strong>The</strong> communications program<br />

A powerful communications program is half the job. In my case it's the whole job. Most<br />

of my work is done automatically.<br />

<strong>The</strong> communications program will help you with the mechanical transportation of<br />

data in both directions. It lets you store incoming information for later use and reduces<br />

the risks of errors.<br />

<strong>The</strong>re are several basically different types of communications programs:<br />

1.<br />

2.<br />

3.<br />

Programs that connect you to an Internet access provider using the TCP/IP<br />

protocol. Example: Trumpet Winsock. In some cases, this is all they do. Sending<br />

email, looking up the <strong>World</strong> Wide Web, and transferring files are done using<br />

various client programs, like Netscape or Mosaic. Other programs, like SlipKnot,<br />

can connect and perform client functions.<br />

General purpose asynchronous communications programs, like Windows<br />

Terminal. <strong>The</strong>se let you call a large range of BBSes, commercial online services,<br />

and Internet hosts. Your dialog with the host can be manual, or governed by<br />

automatic scripts. Connecting to the Internet using TCP/IP is rarely included.<br />

Special purpose communications programs. <strong>The</strong>se are canned programs designed<br />

to do specific tasks on defined services. <strong>The</strong>y are rarely useful on other services,<br />

and for other applications.<br />

Some items to consider when shopping general purpose programs:<br />

Seriously consider buying automatic programs ('robots') for access to individual<br />

online services, even if that means having to use several programs for different<br />

applications. (Read Chapter 16 for more.)<br />

Menus and help texts are important for novices, and in environments with "less<br />

motivated personnel." Advanced users may find it boring.<br />

Ability to transfer data without errors. <strong>The</strong> program should have transfer protocols<br />

like XMODEM, Kermit, XMODEM/CRC, YMODEM and ZMODEM. <strong>The</strong><br />

XMODEM protocol is the most commonly used. You need these protocols if you<br />

want to transfer compiled computer programs (for example, .COM and .EXE<br />

files). <strong>The</strong>y are also used when transferring compressed files, graphics and music<br />

files. ZMODEM is considered the best protocol by many.<br />

Does it let you tailor it to your taste/needs? Some programs let you attach batches<br />

of commands to function keys and keystroke combinations. For example, by<br />

having your computer call your favorite online service by pressing the F1 key.<br />

Does it let you "scroll back" information having disappeared out of your screen?<br />

This may be useful when you want to respond while online to an electronic mail<br />

message. <strong>The</strong> sender's address and name, which you need to respond, have<br />

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