Black, Uyless.
Internet Telephony : Call Processing Protocols / Black Uyless. - Upper Saddle River, NJ : Prentice Hall PTR, 2001. - XIX, 373 s.: il.; 24 cm.
0130255653
Internet Telephony : Call Processing Protocols / Black Uyless. - Upper Saddle River, NJ : Prentice Hall PTR, 2001. - XIX, 373 s.: il.; 24 cm.
0130255653