You might want to become part of the SwissIX association.
Basically, participants are able to participate technically in the SwissIX Internet Exchange, but don't have any voting rights. Members do have voting rights at the yearly general assembly. The participant/membership fee for companies is CHF 400.00 per year and is not refundable. Individuals can apply for participation/membership and pay CHF 100.00. Before filling in the registration form, you might want to have a look at the articles of association.
Before connecting to the SwissIX, you need to accept the connection agreement.