A device and a method for supplying electrical power to at least one induction machine on board an aircraft. Because air can be conveniently collected and the requirement of the base pressure is lower than that of a prior art method, the method of the present invention has the advantages of simple equipment requirement, time-effective manufacturing processes and low cost. The customer then chooses the advertisement of interest. A double eliminator is located in the housing on the seed side so that the double eliminator knocks extraneous seeds from the seed cells of the seed disc. The network node includes a third party identifier for the third party in a SIP message for the session, and transmits the SIP message to the session control function.