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Lancom Systems 3550 manual DSL data transfer is slow, Unwanted connections under Windows XP

Models: 3550

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LANCOM 3550 Wireless

Chapter 9: Troubleshooting

9.3DSL data transfer is slow

The data transfer rate of an broadband (Internet) DSL connection is dependent upon numerous factors, most of which are outside of one's own sphere of influence. Important factors aside from the bandwidth of one's own Internet connection are the Internet connection and current load of the desired target. Numerous other factors involving the Internet itself can also influence the transfer rate.

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Increasing the TCP/IP window size under Windows

If the actual transfer rate of a DSL connection is significantly below the fastest rate listed by the provider, there are only a few possible causes (apart from the above-mentioned external factors) which may involve one's own equipment.

One common problem occurs when large amounts of data are sent and received simultaneously with a Windows PC using an asynchronous connec- tion. This can cause a severe decrease in download speed. The cause of this problem is what is known as the TCP/IP receive window size of the Windows operating system that is set to a value too small for asynchronous connec- tions.

Instructions on how to increase the Windows size can be found in the Knowl- edge Base of the support section of the LANCOM web site (www.lancom- systems.com).

9.4Unwanted connections under Windows XP

Windows XP computers attempt to compare their clocks with a timeserver on the Internet at start-up. This is why when a Windows XP in the WLAN is started, a connection to the Internet is established by the LANCOM.

To resolve this issue, you can turn off the automatic time synchronization on the Windows XP computers under Right mouse click on the time of day Properties Internet time.

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Lancom Systems 3550 manual DSL data transfer is slow, Unwanted connections under Windows XP
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3550 specifications

The Lancom Systems 3550 is a robust and versatile router designed to meet the demanding connectivity needs of modern networking environments. It is particularly well-suited for enterprises seeking to enhance their network performance, reliability, and security. This device combines advanced features with cutting-edge technologies to provide a comprehensive networking solution.

One of the standout features of the Lancom Systems 3550 is its support for various WAN technologies. It supports fiber, DSL, and LTE connections, ensuring seamless internet access regardless of the available infrastructure. This versatility allows businesses to choose the optimal connection type for their specific needs and easily adapt to changing circumstances.

In terms of voice and data capabilities, the 3550 is equipped with integrated VoIP functionality. This feature enables companies to implement Voice over IP solutions, reducing telecommunication costs while improving call quality. The router supports multiple concurrent voice channels, making it an ideal choice for businesses with significant communication requirements.

Security is paramount in today’s digital landscape, and the Lancom Systems 3550 does not disappoint. It includes advanced firewall features and supports VPN technologies, enabling secure remote access for employees and partners alike. With support for SSL and IPSec VPNs, businesses can ensure that sensitive data remains protected, regardless of whether employees are working in the office or remotely.

Another significant characteristic of the 3550 is its high-performance capabilities. It is designed to handle a high volume of data traffic without compromising performance. Equipped with advanced traffic management tools, the router can prioritize essential services, ensuring that critical applications receive the bandwidth they need, even during peak usage times.

Additionally, the device offers robust monitoring and management features. Network administrators can utilize SNMP, Syslog, and other management protocols to gain real-time insights into performance metrics and troubleshoot issues proactively. The intuitive user interface simplifies configuration and management, allowing IT staff to focus on other pressing tasks.

Scalability is also a key advantage of the Lancom Systems 3550. It provides options for expansion and can be integrated seamlessly with other devices in the Lancom ecosystem. This flexibility allows organizations to grow their networks without the need for significant overhauls.

In summary, the Lancom Systems 3550 is an ideal solution for organizations looking to enhance their networking capabilities. With its support for multiple WAN technologies, integrated security features, high performance, and robust management tools, it stands out as a reliable choice for modern enterprises. Whether for data communication or voice solutions, the 3550 ensures optimized performance, security, and scalability in one comprehensive package.