warning: preg_match() [function.preg-match]: Compilation failed: disallowed Unicode code point (>= 0xd800 && <= 0xdfff) at offset 1811 in /home/newgenco/domains/newgenco.vn/public_html/sites/all/modules/ctools/includes/cleanstring.inc on line 157.
warning: preg_match() [function.preg-match]: Compilation failed: disallowed Unicode code point (>= 0xd800 && <= 0xdfff) at offset 1811 in /home/newgenco/domains/newgenco.vn/public_html/sites/all/modules/ctools/includes/cleanstring.inc on line 157.
warning: preg_match() [function.preg-match]: Compilation failed: disallowed Unicode code point (>= 0xd800 && <= 0xdfff) at offset 1811 in /home/newgenco/domains/newgenco.vn/public_html/sites/all/modules/ctools/includes/cleanstring.inc on line 157.
warning: preg_match() [function.preg-match]: Compilation failed: disallowed Unicode code point (>= 0xd800 && <= 0xdfff) at offset 1811 in /home/newgenco/domains/newgenco.vn/public_html/sites/all/modules/ctools/includes/cleanstring.inc on line 157.
Voice over Internet Protocol (VoIP) is a technology that allows voice transmission using IP networking protocols, the existing infrastructure of the Internet.