Using VoIP to empower your business /
Shepard, Steven
Using VoIP to empower your business / Steven Shepard. - 1a ed. - New York : McGraw-Hill, 2008.
9780071548588
Telefonía por Internet.
Internet telephony.
TK5105.8865 / S44 2008
Using VoIP to empower your business / Steven Shepard. - 1a ed. - New York : McGraw-Hill, 2008.
9780071548588
Telefonía por Internet.
Internet telephony.
TK5105.8865 / S44 2008
