Hersent, Olivier.
IP telephony : packet-based multimedia communications systems / Olivier Hersent, David Gurle & Jean-Pierre Petit. - Harlow : Addison-Wesley, cop. 2000. - XVIII, 456 s. : il. ; 23 cm.
0201619105
Telefonia internetowa.
IP telephony : packet-based multimedia communications systems / Olivier Hersent, David Gurle & Jean-Pierre Petit. - Harlow : Addison-Wesley, cop. 2000. - XVIII, 456 s. : il. ; 23 cm.
0201619105
Telefonia internetowa.