Tweaking
your modem
Last
Updated on March 28, 2000 by Thomas
McGuire - Page 3/8
Or, an alternative method is
this.
Take the following steps instead to find the MTU.
- Open up Dial-up Networking & right click on your
connection, select Properties. In the General
tab, select Configure.
- Select
the Options tab.
- Put
a tick in the Bring up terminal window after dialling.
Click Ok twice & exit. Now connect to your
ISP. You'll be asked to login with your username &
password.
4.
Once confirmed you'll be able to see the MaxMTU that
the ISP uses. You can now use that number instead of the one
shown for MaxMTU.
If your ISP uses variable MTU’s
then you should set it to the lowest value it uses.
MSS – MTU-40
(only settable in Windows NT & 2000, it is not supported setting it in Windows 9x). From the example
above it would be set to 1460.
RWIN
Multiplier –
3 or 4. Use 3 first, if you have a very
good connection 4 might work better.
TTL – 32. Higher values will
not improve performance. Increase it to 64 only
if you have problems connecting to some websites.
NDI cache
size - This is only
for network devices (Ethernet cards) not modems. You also
need to have the IPX/SPX protocol installed
to use it anyway. Basically, don’t bother setting it.
Port
settings
Next, click on Start,
Run. Type in win.ini & hit Enter. Scroll down until you reach the [Ports]
heading.
You should edit your port speed as shown above, e.g. if your
modem is on COM2 set it as shown in the picture above. This
is the same as setting it from Device manager.
·
Where
115200 equals Bits per second. Set this value as you set the Maximum speed for the Modem above. Again Winmodems should be set to 57600,
this will minimize disconnections.
·
N equals Parity.
·
8 equals Data
bits.
·
1 equals Stop
bits.
·
p equals
setting Hardware flow
control. Users of Winmodems
should set it to x
to enable Software flow control
instead. This will minimize disconnections.
Any settings in [386Enh]
section of your system.ini
related to your Modem/COM port e.g. Com1Irq4Buffer=1024, are
only effective in Real DOS
mode. Some sites may recommend setting it. They have no effect in Windows. Basically, remove any such references from the
system.ini.
Now go back into System
properties. Find the entry shown below "Ports
(COM & LPT)".
Double
click on Communications
Port to bring up the properties. Select the Port
settings & then click the Advanced
button. Slide each of the bars to the right.
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