search query: @keyword Voice over IP / total: 18
references: 16-18 / 18
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 titleyearauthor
16.
Impacts of Internet protocol on PBX evolution and corporate remote Access
1999 Jantunen, Timo Pekka
17.
IP-puhepalvelun laskenta
1999 Haapasaari, Mauri
18.
The Quality of Voice over IP
1998 Yletyinen, Tomi
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