MaxMTU setting for ISDN

I'm connecting using ISDN 128kbps to Internet from Malaysia. what would be the ideal MaxMTU setting for the ISDN line for 128 kbps per second. If possible , you can give suggestions to alter the Registry setting or any other tool do that. I aware of MTUSpeed Ver 4.0.
Please give suggestions and recommendations to change the MaxMTU setting.
Thanks in advance.
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Pandav, the issue really depends upon your internet connection and the routers that the connection passes through, not necessarily on your computer.

In Windows 98, it is possible to modify the default Maximum Transmission Unit
(MTU) settings, and it sometimes may be
beneficial to alter them.
To view these settings, use the following steps:
1. Click Start, point to Settings, click Control Panel, and then double-click
2. On the Configuration tab, click your Adapter, and then click Properties.
3. On the Advanced tab, click IP Packet Size. The following list shows the
   values you can select in the Values box:
    - Automatic    Programmatic control, this is the default setting
    - Large        1500
    - Medium       1000
    - Small        576
NOTE: When you use Automatic mode, all Point-to-Point Protocol (PPP) connections at speeds below 128kbps are made with an MTU of 576. At speeds above 128kbps, all connections are made with an MTU of 1500. Regardless of the MTU setting, the MTU will be further reduced to account for the network overhead if Virtual Private Networking (VPN) is used.
MTU is the Maximum Transmission Unit of a network. This is the greatest amount
of data or "packet" size that can be transferred in one physical frame on a network. Fragmentation of packets occurs if a packet is sent across a network that has an MTU smaller than the packet's frame length. This leads to reduced performance levels as fragments need to be reassembled.
The Internet standard for MTU is 576. When you connect to an Internet resource, your data may have to go through a router that has an MTU of 576. This results in fragmentation if your MTU is greater than 576, which can result in a Web resource being loaded slowly. It is recommended that most users use the default setting of Automatic for the Internet Protocol (IP) packet size.


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Pandav, you mite try using a nifty piece of software called ispeed which helps you with your internet connection and allows you to tweak it. The url is

Naseebdar admi he jiske pas ISDN he :-)
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