• 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.

 

Giải pháp VoIP
Voice over Internet Protocol (VoIP) là một công nghệ cho phép truyền thoại sử dụng giao thức mạng IP, trên cơ sở hạ tầng sẵn có của mạng internet.
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