3Com 005699-00 - Руководство по установке - Страница 10
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from its slot.
10. Reinstall the modem using the Installation Guide instructions.
Use a different slot from the one used in the initial installa-
tion.
Possible solution:
If you are using an external modem, make sure the modem is plugged in
and turned on. Use only the power adapter included with the modem. The
CS light on the front panel should be illuminated. (An internal modem should
turn on automatically when the computer is turned on.)
Possible solution:
You may not be entering modem commands in the proper manner. Type in
all upper case (AT) or all lower case (at).
Possible solution:
If you are using an external modem, the COM port may not be enabled.
Refer to your computer's manual for information about enabling COM ports
(usually involves altering the BIOS settings, motherboard jumpers, and the
operating system).
Possible solution:
You may be using the wrong serial cable with your external faxmodem.
Make sure you are using an RS-232 modem cable. You will need to make
sure you are using a 25-pin male to 25-pin female if your COM port is a 25-
pin port or a 25-pin male to 9-pin female if your COM port is a 9-pin port.
Problem: The modem won't go off hook to dial or doesn't answer the phone.
Possible solution:
You may have plugged your modem's phone cord into the wrong jack on the
modem. Make sure the phone cord is plugged into a jack labeled with the
word TELCO (marked with
Possible solution:
You might have a bad phone cord connection to your modem. The phone
cord should be plugged into the TELCO jack on the modem (marked with
on externals) and the wall phone jack. The phone cord should be no
longer than 12 feet in length. Use the phone cord included in your modem's
box if possible.
Possible solution:
You may have devices between the modem and the phone jack. There
should be no line splitters, fax machines, or other devices between the
modem and the wall jack. You may have a poor line connection. Place the
call again. Calls are routed differently each time. To verify a valid phone
connection, enter your communication software's terminal mode and type
ATDT18472626000 and press ENTER . This dials the 3Com BBS.
If you must dial a number (such as "9") to reach an outside line, type that
number right after ATDT .
on the underside of external modems).
It is important to remember that your line conditions m
you may be able to make faster connections in the fut
sure that you can use V.90 or 3Com 56K technology,
following tests:
1.
First, make sure your modem supports V.90.
that your modem supports V.90 by opening a
application (RapidComm
ENTER. If the Options line has V.90 listed, th
supports V.90 and 3Com 56K technology.
2.
Make sure that the number you're dialing is a
3Com 56K technology server. Some ISPs m
mixture of V.90 and non-V.90 servers. You c
contacting your ISP and asking them about 5
or V.90 availability.
3.
If it is a V.90 or 3Com 56K server, you may w
it a few more times. Remember, the phone c
each call differently. For testing purposes, yo
call into the 3Com BBS at 847 262 6000, wh
servers attached to it.
4.
If you are able to connect at V.90 speeds on
there may be something between you and y
preventing a V.90 connection from being neg
your ISP and see if they have received simila
other customers.
5.
If you do not make a V.90 connection to our
phone line might not be capable of supporting
56K technology speeds. If you are experienc
problems with V.90 connections (i.e., not ma
speed connection, abrupt disconnections, et
3Com Technical Support for U.S. Robotics m
262 5151.
Problem: Your communications software fails to in
Possible solution:
Your software's port settings may be incorrect. Make s
software's port settings match those for your modem.
If you have an older version of RapidComm software
you must uninstall it before installing the most recent v
tained on the Connections CD-ROM that comes with yo
dem). Otherwise, system conflicts may hamper the
software's ability to work properly.
Possible solution:
If you are using an external modem, make sure the mo
in and turned on. Use only the power adapter included
The CS light on the front panel should be illuminated. (A
modem should turn on automatically when the comput
TM
), typing ati7,