AAL, NPL and ATHP protocol key licenses, when installed, let you connect teaspeak servers using ts3/ts5 clients.
This kind of licenses is not supported by teaspeak team.
If you need more info about this licenses, send @world a personal message
as yamano told you . all license doing same thing. allowing connecting
the diffrence is just the license type shown on server information. aal shows "activated license" npl shows"non profit license" and athp shows" hosting provider license"