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- The Modem Package
-
- Randy Wolpert
- Hawaii IBM PC Users' Group
-
- As each day passes, home computers
- become more and more a part of
- everyday life. The novelty hasn't
- worn off, but we now expect them to
- do a lot more. If you have any
- doubts about this, just look at a
- listing of the top selling software
- for "home computers" now, and compare
- it to the same type of list you might
- have found just four or five years
- ago.
-
- I would like to address some of the
- more frequently asked questions
- regarding communications, and some of
- the problems and choices that come up
- when trying to find the "package"
- that is right for you.
-
- First and foremost, for those of you
- who may not even know it, your
- computer can be hooked up to the
- phone. All that's needed (assuming
- you already have a computer) is a
- modem, and some software to use it.
- The term modem comes from
- "Modulate/Demodulate", which simply
- means that once the two computers are
- "talking to each other", the computer
- that is doing the "talking"
- (modulating) is sending characters
- over the phone line, while the
- computer at the other end is
- "listening" (demodulating) to the
- incoming characters that have been
- sent.
-
- If that's all there was to it,
- choosing a modem would be a very
- simple decision: get the least
- expensive modem with the best
- warranty and you're in
- business...wrong!
-
- The first decision you have to make
- is probably the most important; do
- you want an internal or external
- modem? This is probably the biggest
- stumbling block for prospective
- buyers. There are good and bad points
- for either type. First let me explain
- the differences between the two.
- Assuming, for the sake of argument,
- both types will do the same functions
- when it comes to actual
- "communication".
-
- An INTERNAL modem goes right inside
- your computer and you won't even know
- it's there. You don't need more on
- that already cluttered desk of yours.
- With an internal modem, all you have
- to do is plug it into the wall outlet
- using a simple phone cord, and you're
- ready to go. There aren't any other
- cables to attach as there are with
- external modems. You don't have to
- purchase a separate card that has a
- serial port on it because the modem
- has not one, but two built in. You
- can use the other connection to run a
- mouse or serial printer or whatever
- other serial device you choose. You
- have the ability to put 256K on the
- mother board and you don't need any
- more than that to run your
- applications. You have a printer port
- on your monochrome display, and now
- you will have two serial ports. Why
- spend all that extra money on a
- multifunction board for just a clock
- now that you have all of the
- essentials?
-
- An EXTERNAL modem, because you are
- almost out of slots in your PC. Why
- waste that last slot when you already
- have a multifunction board that has
- the connection for serial device such
- as a modem? With an external modem,
- you can "see" what is happening
- because it has lights that keep you
- informed as to what's going on. There
- will be less heat build up in your
- unit, and if you're not careful,
- choosing the wrong internal modem may
- require that the slot next to it be
- vacant to accommodate its width. You
- can also change the volume level on
- it because the knob for this
- adjustment is right on the modem.
- Since you change the way you use your
- modem so often, changing the switches
- for different applications is much
- easier. If you only use your modem
- once in a while, you can leave it off
- because it has a separate power
- supply. One other thing to think
- about is you can easily move it from
- one computer to another just by
- unplugging it.
-
- The only other big decision is
- choosing what baud rate you want, or
- can afford. The term baud rate is
- simply a way of expressing the speed
- at which the modem can communicate
- with the computer at the other end of
- the line. A 300 baud modem can
- transmit and receive 30 characters
- per second and is roughly $250 -
- $300. A 1200 baud modem can do the
- same at 120 cps and sells for between
- $500 - $700. The prices vary, but
- this will give you a rough idea of
- what you are in for. The old saying
- "A chain is only as strong as its
- weakest link" also applies to modems.
- If you communicate with modems that
- are restricted to 300 baud, it
- doesn't matter how fast and fancy
- your modem is, it's going to look and
- operate like a 300 baud modem. If on
- the other hand, you can take
- advantage of the higher speeds
- because the service or whoever you
- call has the capability of 1200 baud,
- then you should consider the higher
- priced, faster modems. Just a note:
- most of the "information" services
- available charge a higher rate per
- hour at the higher baud rate, and
- although it is not four times more,
- it is something to remember.
-
- Now, my personal thoughts. It used to
- be quite a feature if a modem could
- "pick up the phone, dial the number,
- wait for an answer, then give you
- control". Now that is expected in a
- modem. We also expect it to be able
- to automatically answer the phone on
- the first ring. In order for a modem
- to take full advantage of the
- software programs available, I think
- this is a must. Stay away from modems
- that require you to dial.
-
- Another question to have answered is
- "Does the modem have a speaker built
- in?". I would not consider one that
- didn't, especially the internal
- modems. An internal modem without a
- speaker provides you with no way of
- "monitoring" your call, except
- watching the screen. With the
- built-in speaker, you can monitor
- your call up to its time of
- connection. If you dial time you can
- even find out what the exact time is
- by listening in on the call. The main
- reason for a speaker is to learn if
- you have a dial tone, if the call is
- placed, and if another computer
- answers. Then the speaker, unless we
- tell it not to, will go silent and
- normal communications begin.
-
- One last thing to consider. Try to
- have a demo on any software packaged
- with the modem. There are many good
- programs available, and each type has
- its strong points so make Joe earn
- his keep. Have him show you the
- auto-dialing directory, the scrolling
- and searching through previously
- captured information, the file upload
- and download capabilities, and any
- other features that may accompany the
- software package. In general, if you
- buy software separate from a modem
- (even the best ones come without
- software), make sure the two
- compliment each other so you get the
- most out of your purchase.