License keys for Skype for Asterisk channels are intended for use only on a single server and must be activated (registered) on the server on which they will be used.
It is extremely important that you carefully follow the instructions provided in the README file for installing a new Skype for Asterisk key to your Asterisk server and for backing up your Skype for Asterisk key(s).
The Skype for Asterisk key must be re-registered if certain hardware changes are made to your Asterisk server.
A Skype for Asterisk key can only be re-registered once without authorization from Digium, so we strongly recommend that you make a backup copy of the license file created during the key activation (registration).
After these two initial registrations a new key will need to be purchased.
Multiple Skype for Asterisk keys may be registered to the same Asterisk server. This allows the user to increase the total number of available Skype for Asterisk channels authorized for use on that server. New Skype for Asterisk keys may be registered to your Asterisk server using the same instructions provided in the Installation Procedure section of the README file. Note that a single license key file for a given number of channels may not be later split among different servers.
All purchases of Skype for Asterisk keys are final. Refunds are not available for Skype for Asterisk purchases.
Also see the Skype for Asterisk FAQ.
