Multitech RF500S Uživatelský manuál stáhnout pdf (Strana 13)

4.4 Optimization

Did the speed tweaks on DSL Reports. Depending on overall network conditions the Speed Test Center

indicate 488kbp/s down and 490kbp/s up transfer speed. Trace Route indicate typical 8ms ping times

within the Vitts Network and coast-to-coast ping times in the 45-55ms range.

Windows performance Tip – Optimizing the TCP/IP stack can significantly improve performance.

The speed tweak adjusts the receive window to accommodate fast transfer rate with substantial

latency.

4.5 Acceptable Use Policy

Same caution as applies to dialup ISPs be sure to review the acceptable use policy. Make sure the provider

does not prohibit operating a home LAN.

Some services place monthly quotas on maximum download or upload quantity. Make sure you fit in any

restrictions.

4.6 Privacy Policy

Examine the privacy policy to determine how your information will be treated. It is reasonable for the ISP

to collect and use information for diagnostic purposes and to improve service. However, many ISPs sell

customer information to 3

parties. Your ISP knows every web page you access, every file you download

or upload and every mail, USENET and IM message that flows over their network. All of that information

can be sold to others depending on the privacy policy.

Most ISP’s reserve the right to change policy at any time so the current policy is not an ironclad guarantee.

4.7 Service Level Agreement

Business class DSL typically includes a service level agreement. This defines minimum speed, maximum

latency, and time to repair if when something goes wrong, etc. These guarantees are one of the reasons

business class service is more expensive then consumer. The upside is a guaranteed minimum level of

service rather then a best effort promise that make it hard to determine if the provider is delivering the

service or not. Data communication is the lifeblood of most businesses one needs to carefully consider the

impact of communication failure.

4.8 Turmoil in DSL Land

Making money delivering DSL service turned out to be more difficult then expected. The decline in stock

market valuation makes it much harder for companies to obtain financing. This has caused severe problems

for many companies. In our case our first choice discontinued DSL service early in 2001. Luckily we were

unable to obtain service from them. Our current provider, Vitts is in Chapter 11 bankruptcy. It does not

appear they will survive. So we will soon be faced with selecting another DSL provider.

Select your provider with caution and have a backup plan if they run into trouble.

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Multitech RF500S Uživatelský manuál Strana 13