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3D Spotlight : Tweaking : Tweaking your modem

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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.

  1. Open up Dial-up Networking & right click on your connection, select Properties. In the General tab, select Configure.
  2. Select the Options tab.
  3. 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.

MSSMTU-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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