Method for operating a telephone system with at least two telephone terminals and telephone terminal for implementing the method
Method for operating a telephone system with at least two telephone terminals and telephone terminal for implementing the method
- CN 101,515,963 A
- Filed: 02/11/2009
- Published: 08/26/2009
- Est. Priority Date: 02/21/2008
- Status: Active Application
- EN CH
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- Pin
