Voice over IP - Die Technik: Grundlagen, Protokolle, Anwendungen, Migration, Sicherheit, Notrufdienste, Videotelefonie
€18.99
€59.99
Save 68%
🔥 people are purchasing this right now!
30-Day Risk-Free Returns & Money-Back Guarantee
⚡ Low Stock: Only items left!
Successfully added to your bag!