Compare SIP SDK features by license type:
This is not a a list of all supported features, only those affected by the licensing. See the software home page or the documentation for the full list of features. *"Max nr. of users" means different devices where the SDK will be used (usually the number of people using the software) *"Max nr. of SIP servers" means different SIP servers (softswitch / IP-PBX / SIP proxy) configured for the SDK as registrar and for outbound/inbound calls (usually by the "serveraddress" parameter)