home *** CD-ROM | disk | FTP | other *** search
-
- T E S T I N G Y O U R M O D E M
-
- After you hook up your modem, you will want to test it to
- make sure you are connected to the correct COM port. Make
- sure you have all the cables hooked up. One of the most
- common mistakes is plugging the phone line into the wrong
- jack on the modem. Read the modem instructions carefully.
- If you do have it plugged into the wrong jack, you can
- easily correct the situation by trying the other jack. If
- you have an external modem, make sure you turn your modem
- on. An internal modem is powered by your PC's power
- supply. This means that when you turn on your computer,
- an internal modem will automatically be powered on.
-
- The following test will make your modem howl. External
- modems can be particularly loud (depending on how the
- volume is set). If a loved-one is sleeping nearby, you may
- wish to wait for a more appropriate time. The next two
- commands should be issued in either lower or upper case
- letters. Do not mix upper and lower case letters when issuing
- one of these commands. Suppose you believe that your modem is
- using COM4. With all the power on, issue the following command
- at the DOS prompt:
-
- echo ata > com4 <ENTER>
-
- If your modem is connected to COM4, you should hear a
- dial tone. If you are testing for another COM port, make
- the appropriate change in the command (i.e. COM2, COM3,
- etc.). Some external modems will squeal like a stuck pig
- when you issue the above command. To turn the shrieking
- noise off, issue a command like the following:
-
- echo ath > com4 <ENTER>
-
- These commands make use of the basic AT Hayes command
- set, which has been adopted by modem manufacturers as the
- industry standard. A modem that is Hayes compatible can
- use this basic Hayes command set. Don't buy a modem if it
- isn't Hayes compatible. The command letters AT wake up
- the modem and initialize it.
-
- The first command used ATA, which told the modem to
- answer an incoming call. The second command contained
- ATH, which tells the modem to hang up the phone.
-
- If you have an external modem and don't like the concept
- of having your modem howl, you can issue a command that
- will only make your modem lights flash. Suppose you have
- an external modem and the baby is asleep. You turn your
- machine and modem on. Make sure all the cables are
- connected. You suspect that the modem is connected to
- COM2. Then issue the following command at the DOS prompt:
-
- echo at > com2 <ENTER>
-
- Before you press the <ENTER> key, look at the modem
- lights. If the external modem is connected to COM2, then
- the lights will flash when you issue the above command.
- This offers a test to see if the external modem is
- connected to the COM port that you think it is. If the
- modem lights didn't flash, try changing the command to
- reflect other COM ports (COM1, COM3, COM4). The AT means
- ATTENTION modem.
-
- For more information about the basic AT Hayes command
- set, and more modem tests, see the section on AT command
- set usage.
- =========================================================
-