You can proceed in two steps depending on the service type :

For IP Racer and IP Dstar satellite internet services

Step 1 : Chose the speed you want to have on your satellite internet access

Step 2 : Chose the contention

The contention have to be chosen depending on the number of the PC you will have on your network, the more there will be an important contention and the smaller the number of PC will have to be if you want to have good rates for you internet access. If the contention chosen is too big, you will have slow speeds for your satellite internet access.

For example, for IP D-Star services in France, there is only 50:1 contention, so it is adviced to put less than 10 PC on the Coliseum satellite internet access service and less than 20 PC on the Premium satellite internet access service.

For exemple, for IP Racer services, we can easilly build a services at a wished bandwidth and a wished contention, these are the most advanced service existing in satellite internet access business at the moment.

For the IP Starter and Ip Booster satellite braodband Internet access services 

First step : estimate your data volume needs

you have to know how much bandwidth you will use per month in average. A normal internet user uses less than 1Go in download and less than 250Mo in Upload. Depending on how many users there will be on the network you will know the average needs you have.

If you wnat to use VoIP or Video streaming, you will have to take it into account in the volumes, 128Kbps streaming makes 1Mo volume every minute and 1 phone conversation makes 0.2Mo every minute

Secound step : chose you bandwidth

To each services corresponds a given adviced volumes, you can chose you service oin the basis of the estimations of step 1. If you want more bandwidth speed, you can chose the service following the speed you want and be sure that the adviced data volumes will be far to be reached !