# RE: What does 95th %tile mean?

Here's how I explain it on our burstable T1's & T3's (We bill at the 90th
percentile BTW):

Burstable T1 Explanation

I hope that this explanation helps:

Consider that your Internet usage is probably similar to 99% of all business
users. You will probably use the circuit Monday through Friday between the
hours of 8am and 5pm. Utilization in the off hours and on weekends should be
close to zero. This means that over an entire month (720 hours), you will

Remember, in that 180 hours (8am - 5pm), you will not be constantly
traffic is "bursty". For example: If you are viewing a web page and you hit
your enter key, data is transmitted and the image and text load. Once it is
loaded, the transmission stops and you read the web page. At this point the
bandwidth is again sitting idle and utilization is back at zero. This is the
cycle that repeats itself during the day so it is a safe bet that your
utilization in that 180 hour time frame is 50% at best.

This now leaves you with 90 hours of utilization for the month.
Since we bill you at the 90th percentile, this means that we will discard
the highest 10% of you bandwidth peaks. The 10% equates to 72 hours. This
means that we will subtract the HIGHEST 72 hours of utilization from the
remaining 90 hours.

This now leave you with the lowest 18 hours of utilization for the month.
Again, I can't guarantee it, but it is very unlikely that your lowest 18
hours will be greater than 100k.

This graph illustrates a typical business customers utilization on a T-1
circuit.