Voice over IP fundamentals /

• Main Author: Davidson, Jonathan
• Corporate Author: Cisco Press
• Format: Book
• Language: English
• Published: Indianapolis, IN : Cisco Press, 2007
• Edition: 2nd ed.
• Series: Cisco Press Fundamentals Series
• Subjects: Computer networks protocols; Internet telephony; Τηλεφωνία μέσω διαδικτύου