2400 BPS Internal Modem (250-1034) Install Faxback Doc. # 5051
INSTALLING THE MODEM
This document describes how to install the modem in your computer. It
includes:
* Information about the telephone line
* Selecting a communications port
* Installing the modem board
* Installing the communications software
* Testing the modem installation
* Common communication errors
When you complete installation, proceed to "A Quick Start with Your Modem".
NOTE: If you do not wish to install the modem yourself, take it to the near-
est Radio Shack computer store for installation.
INFORMATION ABOUT THE TELEPHONE LINE
We designed your modem to conform to federal regulations and you can connet
it to most telephone lines. Modems (or other products, such as telephones
and answering machines) that you connect to the phone line draw power from
the line. We refer to this power draw as the ringer equivalence number, or
REN. If you use more than one product on the line, add the RENs. If the
total is more than five, or three in rural areas, your phones might not
ring.
NOTE: You must not connect your modem to coin-operated systems or party-line
systems. Also, do no connect your modem to multiple-line telephones without
an optional multiple-line controller.
You must provide the following to your phone company upon request.
Registration Number: BFH9D9-19738-MD-E
REN: 0.7B
SELECTING A COMMUNICATIONS PORT
Most computers allow two communications ports, Com 1 and 2, to identify the
address or location in computer memory of each serial device that is connected
to the computer.
The factory setting is Com 1. If you use a mouse or other serial device,
check its board setting to see which Com port it addresses. If the other
device is also set for Com 1, you must change the Com port setting on your
modem to Com 2. If you set two devices to the same address, your modem or
the other serial device does not function properly.
If necessary, before installing the modem, change the Com port, be sure to
select the same com port that you selected with the jumpers on the modem.
See Faxback Document # 5055 for detail.
INSTALLING THE MODEM BOARD
Your modem is designed for easy installation in any compatible computer. The
modem fits in a standard-length expansion slot.
NOTE: Before you install (or remove) the modem board or any other circuit
boards in your computer, be sure that the computer power switch is off.
To install the modem board:
1. Avoid static electricity buildup, which can destroy certain integrated
circuits. To do this, touch a grounded metal object (such as the computer
chassis) while handling the modem (or any other circuit boards).
Do not stand on a carpeted floor while installing the modem.
2. Remove the screws securing the computer's cover and slide the cover off
to open the computer. Save these screws so that you can replace the com-
puter cover at the end of installation.
3. Select the expansion slot into which you want to install the modem. To
remove the expansion slot's back panel bracket, take out its fastening
screw and lift the bracket straight up. Save the screw for attaching the
modem board.
4. Insert the modem board into the expansion slot. Fasten the board to the
computer using the screw that you removed in Step 3.
5. Replace the computer cover an secure it with the screws previously
removed.
6. Connect one end of the modular phone cable (supplied with the modem) to
either of the two modular phone cable connectors on the modem.
7. Connect the other end of the modular phone cable to your phone jack.
You can connect a standard telephone to the second jack on the back of the
modem. As long as you leave your modem and phone connected, you can continue
to use your telephone even when your computer is turned off.
To connect your modem and telephone to the same line, simply plug the
telephone's modular telephone cord into the unused jack on your modem board.
INSTALLING THE COMMUNICATIONS SOFTWARE
Communications software is required for communication with the modem. Some
of the commercial software packages commonly used today are DeskMate Telecom,
Crosstalk, Smartcom, and ProComm.
Because software installation depends on the communications package you use,
refer to your communications software manual for instructions.
After you install the communications software, set up the software according
to certain conditions (parameters) required by your computer and the com-
puter with which you plan to communicate.
To set up your software, turn on the computer and run the communications
software program. Be sure to set the communications software according to
your modem type (such as Hayes) and the communications port you are using
(either Com 1 or Com 2). (For details on setting parameters, refer to your
communications software manual.)
In addition, your communications software will prompt you to set up these
parameters:
* Baud/BPS (bits per second) rate
* Word Length
* Parity
* Stop Bits
* Flow control
(These parameters are defined in the glossary at the eend of this manual.)
The following is an example of typical menu settings, based on DeskMate's
Telecom software:
Baud 9600
Word Length 8 bits
Parity none
Stop Bits 1
Flow Control on
TESTING THE MODEM INSTALLATION
After you have installed the modem and set up the communications software,
you can test the installation.
To test the modem:
1. Turn on the computer and start your communications program.
2. Type ATZ and press <ENTER>. The modem responds with OK.
3. Type AT&Q0&T1 and press <ENTER> to place the modem in non-error-control
mode and enable the analog loopback test of the modem.
4. Type at the keyboard. The modem echoes what you type to the monitor this
test lets you know that you have correctly connected the modem and that
the modem can communicate with each other.
To end the test:
1. Type +++. (Do not press <ENTER>.) The modem responds with OK.
2. Type AT&T0 and press <ENTER>. The modem responds with OK.
You are now ready for normal modem operation.
COMMON COMMUNICATIONS ERRORS
If the data you enter during the test is displayed on the monitor with errors,
re-enter ATZ.
Two common causes for the errors are:
* More than one computer device is assigned to the same communications port
address, or the communications software is not configured to the port that
is set on the modem.
You can correct this by making certain that no other board installed in the
computer has the same port address as the modem board.
* The communications software might have the automatic echo option enabled. In
this case, the display to the monitor is duplicated. for example, if you
enter A at the keyboard, the monitor displays AA.
To correct this, turn off the automatic echo in the communications software.
(smm 08/26/93)