01013nam a2200373 4500 DLU110127065 ##20111024 ##990309s2000 inua 001 0 eng 99061716 1578701686 (DLC) 99061716 DLC DLC DLC pcc 004.62 DA-J Davidson, Jonathan. Voice over IP fundamentals / Jonathan Davidson, James Peters, with contributions by Brian Gracely. Indianapolis, IN : Cisco Press, c2000. xx, 373 p. : ill. ; 30 cm. Cisco Press fundamentals series Includes index. Internet telephony. Gracely, Brian. Peters, James, 1965- 01/2011CT GT 0 KCT True Đào Thị Thu Huyền G A SH Thư viện Trường Đại học Đà Lạt