{"id":479568,"date":"2023-08-09T10:42:08","date_gmt":"2023-08-09T10:42:08","guid":{"rendered":""},"modified":"2023-09-05T11:19:06","modified_gmt":"2023-09-05T11:19:06","slug":"voip","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/voip\/","title":{"rendered":"VoIP"},"content":{"rendered":"<p>VoIP, vi\u1ebft t\u1eaft c\u1ee7a Voice over Internet Protocol, l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 mang t\u00ednh c\u00e1ch m\u1ea1ng cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng th\u1ef1c hi\u1ec7n cu\u1ed9c g\u1ecdi tho\u1ea1i qua internet thay v\u00ec \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i truy\u1ec1n th\u1ed1ng. N\u00f3 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u tho\u1ea1i analog th\u00e0nh d\u1eef li\u1ec7u s\u1ed1, cho ph\u00e9p truy\u1ec1n t\u1ea3i hi\u1ec7u qu\u1ea3 qua m\u1ea1ng IP. VoIP \u0111\u00e3 thay \u0111\u1ed5i ho\u1ea1t \u0111\u1ed9ng truy\u1ec1n th\u00f4ng, cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p gi\u00e0u t\u00ednh n\u0103ng v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c c\u00e1 nh\u00e2n v\u00e0 doanh nghi\u1ec7p tr\u00ean to\u00e0n th\u1ebf gi\u1edbi.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a VoIP v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n<p>Ngu\u1ed3n g\u1ed1c c\u1ee7a VoIP c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a m\u1ea1ng m\u00e1y t\u00ednh v\u00e0 s\u1ef1 ra \u0111\u1eddi c\u1ee7a Internet. V\u00e0o nh\u1eefng n\u0103m 1970, n\u1ec1n t\u1ea3ng cho m\u1ea1ng chuy\u1ec3n m\u1ea1ch g\u00f3i \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1eb7t ra, cu\u1ed1i c\u00f9ng d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a VoIP. L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00f4ng ngh\u1ec7 gi\u1ed1ng nh\u01b0 VoIP l\u00e0 v\u00e0o n\u0103m 1973 khi Giao th\u1ee9c tho\u1ea1i m\u1ea1ng (NVP) c\u1ee7a ARPANET cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng truy\u1ec1n c\u00e1c g\u00f3i tho\u1ea1i qua m\u1ea1ng.<\/p>\n<p>Tuy nhi\u00ean, ph\u1ea3i \u0111\u1ebfn nh\u1eefng n\u0103m 1990, VoIP m\u1edbi tr\u1edf n\u00ean thi\u1ebft th\u1ef1c v\u00e0 ph\u1ed5 bi\u1ebfn. C\u00e1c c\u00f4ng ty nh\u01b0 VocalTec Communications \u0111\u00e3 gi\u1edbi thi\u1ec7u c\u00e1c \u1ee9ng d\u1ee5ng d\u1ef1a tr\u00ean ph\u1ea7n m\u1ec1m cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng th\u1ef1c hi\u1ec7n cu\u1ed9c g\u1ecdi b\u1eb1ng m\u00e1y t\u00ednh c\u1ee7a h\u1ecd. K\u1ec3 t\u1eeb \u0111\u00f3, c\u00f4ng ngh\u1ec7 \u0111\u00e3 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng v\u00e0 VoIP hi\u1ec7n l\u00e0 th\u1ebf l\u1ef1c th\u1ed1ng tr\u1ecb trong ng\u00e0nh vi\u1ec5n th\u00f4ng.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 VoIP: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 VoIP<\/h2>\n<p>VoIP ho\u1ea1t \u0111\u1ed9ng tr\u00ean nguy\u00ean t\u1eafc chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u00e2m thanh analog th\u00e0nh c\u00e1c g\u00f3i k\u1ef9 thu\u1eadt s\u1ed1, sau \u0111\u00f3 \u0111\u01b0\u1ee3c truy\u1ec1n qua internet ho\u1eb7c m\u1ea1ng d\u1ef1a tr\u00ean IP. Qu\u00e1 tr\u00ecnh n\u00e0y bao g\u1ed3m m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n ch\u00ednh:<\/p>\n<ol>\n<li>\n<p><strong>Chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1 sang k\u1ef9 thu\u1eadt s\u1ed1<\/strong>: C\u00e1c thi\u1ebft b\u1ecb VoIP nh\u01b0 \u0111i\u1ec7n tho\u1ea1i IP ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i m\u1ec1m chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u gi\u1ecdng n\u00f3i t\u01b0\u01a1ng t\u1ef1 t\u1eeb micr\u00f4 th\u00e0nh d\u1eef li\u1ec7u s\u1ed1.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110\u00f3ng g\u00f3i<\/strong>: \u00c2m thanh s\u1ed1 h\u00f3a \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh c\u00e1c g\u00f3i nh\u1ecf, m\u1ed7i g\u00f3i ch\u1ee9a m\u1ed9t ph\u1ea7n d\u1eef li\u1ec7u gi\u1ecdng n\u00f3i.<\/p>\n<\/li>\n<li>\n<p><strong>Truy\u1ec1n m\u1ea1ng IP<\/strong>: C\u00e1c g\u00f3i n\u00e0y \u0111\u01b0\u1ee3c g\u1eedi qua m\u1ea1ng IP, ch\u1eb3ng h\u1ea1n nh\u01b0 internet, s\u1eed d\u1ee5ng Giao th\u1ee9c \u0111i\u1ec1u khi\u1ec3n truy\u1ec1n d\u1eabn (TCP) ho\u1eb7c Giao th\u1ee9c g\u00f3i d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng (UDP).<\/p>\n<\/li>\n<li>\n<p><strong>L\u1ed9 tr\u00ecnh<\/strong>: C\u00e1c g\u00f3i VoIP \u0111i qua nhi\u1ec1u b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 chuy\u1ec3n m\u1ea1ch kh\u00e1c nhau tr\u00ean internet \u0111\u1ec3 \u0111\u1ebfn \u0111\u00edch.<\/p>\n<\/li>\n<li>\n<p><strong>Chuy\u1ec3n \u0111\u1ed5i k\u1ef9 thu\u1eadt s\u1ed1 sang t\u01b0\u01a1ng t\u1ef1<\/strong>: \u1ede \u0111\u1ea7u nh\u1eadn, c\u00e1c g\u00f3i k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i tr\u1edf l\u1ea1i th\u00e0nh \u00e2m thanh analog, cho ph\u00e9p ng\u01b0\u1eddi nh\u1eadn nghe \u0111\u01b0\u1ee3c gi\u1ecdng n\u00f3i.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a VoIP: VoIP ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n<p>VoIP d\u1ef1a v\u00e0o m\u1ed9t s\u1ed1 giao th\u1ee9c v\u00e0 c\u00f4ng ngh\u1ec7 \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru:<\/p>\n<ol>\n<li>\n<p><strong>Giao th\u1ee9c th\u1eddi gian th\u1ef1c (RTP)<\/strong>: RTP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy\u1ec1n \u00e2m thanh v\u00e0 video theo th\u1eddi gian th\u1ef1c qua m\u1ea1ng IP.<\/p>\n<\/li>\n<li>\n<p><strong>Giao th\u1ee9c kh\u1edfi t\u1ea1o phi\u00ean (SIP)<\/strong>: SIP ch\u1ecbu tr\u00e1ch nhi\u1ec7m thi\u1ebft l\u1eadp, s\u1eeda \u0111\u1ed5i v\u00e0 k\u1ebft th\u00fac c\u00e1c phi\u00ean VoIP, ch\u1eb3ng h\u1ea1n nh\u01b0 thi\u1ebft l\u1eadp cu\u1ed9c g\u1ecdi v\u00e0 ch\u1ea5m d\u1ee9t cu\u1ed9c g\u1ecdi.<\/p>\n<\/li>\n<li>\n<p><strong>Codec<\/strong>: VoIP s\u1eed d\u1ee5ng nhi\u1ec1u codec \u00e2m thanh kh\u00e1c nhau \u0111\u1ec3 n\u00e9n v\u00e0 gi\u1ea3i n\u00e9n d\u1eef li\u1ec7u gi\u1ecdng n\u00f3i m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. C\u00e1c codec ph\u1ed5 bi\u1ebfn bao g\u1ed3m G.711, G.729 v\u00e0 Opus.<\/p>\n<\/li>\n<li>\n<p><strong>Ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 (QoS)<\/strong>: C\u01a1 ch\u1ebf QoS \u01b0u ti\u00ean l\u01b0u l\u01b0\u1ee3ng VoIP, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tr\u1ec5, \u0111\u1ed9 gi\u1eadt v\u00e0 m\u1ea5t g\u00f3i \u1edf m\u1ee9c t\u1ed1i thi\u1ec3u cho c\u00e1c cu\u1ed9c g\u1ecdi ch\u1ea5t l\u01b0\u1ee3ng cao.<\/p>\n<\/li>\n<li>\n<p><strong>T\u01b0\u1eddng l\u1eeda v\u00e0 NAT Traversal<\/strong>: H\u1ec7 th\u1ed1ng VoIP c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i s\u1ef1 c\u1ed1 v\u1ec1 t\u01b0\u1eddng l\u1eeda v\u00e0 D\u1ecbch \u0111\u1ecba ch\u1ec9 m\u1ea1ng (NAT), c\u1ea7n c\u00f3 c\u00e1c k\u1ef9 thu\u1eadt c\u1ee5 th\u1ec3 \u0111\u1ec3 truy\u1ec1n t\u1ea3i th\u00edch h\u1ee3p.<\/p>\n<\/li>\n<\/ol>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a VoIP<\/h2>\n<p>VoIP cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh gi\u00fap n\u00f3 kh\u00e1c bi\u1ec7t v\u1edbi \u0111i\u1ec7n tho\u1ea1i truy\u1ec1n th\u1ed1ng:<\/p>\n<ol>\n<li>\n<p><strong>Hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed<\/strong>: Cu\u1ed9c g\u1ecdi VoIP th\u01b0\u1eddng r\u1ebb h\u01a1n so v\u1edbi cu\u1ed9c g\u1ecdi \u0111i\u1ec7n tho\u1ea1i truy\u1ec1n th\u1ed1ng, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi li\u00ean l\u1ea1c \u0111\u01b0\u1eddng d\u00e0i v\u00e0 qu\u1ed1c t\u1ebf.<\/p>\n<\/li>\n<li>\n<p><strong>Uy\u1ec3n chuy\u1ec3n<\/strong>: Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n cu\u1ed9c g\u1ecdi VoIP t\u1eeb nhi\u1ec1u thi\u1ebft b\u1ecb kh\u00e1c nhau nh\u01b0 m\u00e1y t\u00ednh, \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh, m\u00e1y t\u00ednh b\u1ea3ng v\u00e0 \u0111i\u1ec7n tho\u1ea1i IP, mang l\u1ea1i s\u1ef1 linh ho\u1ea1t v\u00e0 di \u0111\u1ed9ng.<\/p>\n<\/li>\n<li>\n<p><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/strong>: H\u1ec7 th\u1ed1ng VoIP c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng m\u1edf r\u1ed9ng quy m\u00f4 \u0111\u1ec3 \u0111\u00e1p \u1ee9ng s\u1ed1 l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng ng\u00e0y c\u00e0ng t\u0103ng m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111\u00e1ng k\u1ec3.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110a ph\u01b0\u01a1ng ti\u1ec7n<\/strong>: Ngo\u00e0i c\u00e1c cu\u1ed9c g\u1ecdi tho\u1ea1i, VoIP c\u00f2n h\u1ed7 tr\u1ee3 h\u1ed9i ngh\u1ecb video, nh\u1eafn tin t\u1ee9c th\u1eddi v\u00e0 chia s\u1ebb t\u1ec7p, cho ph\u00e9p c\u1ed9ng t\u00e1c n\u00e2ng cao.<\/p>\n<\/li>\n<li>\n<p><strong>H\u1ed9i nh\u1eadp<\/strong>: H\u1ec7 th\u1ed1ng VoIP c\u00f3 th\u1ec3 t\u00edch h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c, nh\u01b0 ph\u1ea7n m\u1ec1m qu\u1ea3n l\u00fd quan h\u1ec7 kh\u00e1ch h\u00e0ng (CRM), n\u00e2ng cao n\u0103ng su\u1ea5t.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i VoIP<\/h2>\n<p>C\u00f4ng ngh\u1ec7 VoIP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, m\u1ed7i lo\u1ea1i ph\u1ee5c v\u1ee5 cho c\u00e1c nhu c\u1ea7u v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u0110i\u1ec7n tho\u1ea1i IP<\/strong><\/td>\n<td>\u0110i\u1ec7n tho\u1ea1i d\u1ef1a tr\u00ean ph\u1ea7n c\u1ee9ng k\u1ebft n\u1ed1i Internet tr\u1ef1c ti\u1ebfp qua Ethernet.<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110i\u1ec7n tho\u1ea1i m\u1ec1m<\/strong><\/td>\n<td>C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t tr\u00ean m\u00e1y t\u00ednh ho\u1eb7c thi\u1ebft b\u1ecb di \u0111\u1ed9ng cho VoIP.<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i ATA<\/strong><\/td>\n<td>B\u1ed9 \u0111i\u1ec1u h\u1ee3p \u0111i\u1ec7n tho\u1ea1i analog cho ph\u00e9p \u0111i\u1ec7n tho\u1ea1i truy\u1ec1n th\u1ed1ng s\u1eed d\u1ee5ng VoIP.<\/td>\n<\/tr>\n<tr>\n<td><strong>VoIP di \u0111\u1ed9ng<\/strong><\/td>\n<td>\u1ee8ng d\u1ee5ng VoIP tr\u00ean thi\u1ebft b\u1ecb di \u0111\u1ed9ng s\u1eed d\u1ee5ng d\u1eef li\u1ec7u di \u0111\u1ed9ng ho\u1eb7c Wi-Fi.<\/td>\n<\/tr>\n<tr>\n<td><strong>WebRTC<\/strong><\/td>\n<td>Giao ti\u1ebfp th\u1eddi gian th\u1ef1c trong tr\u00ecnh duy\u1ec7t web m\u00e0 kh\u00f4ng c\u1ea7n b\u1ed5 sung th\u00eam.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng VoIP, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n<p>VoIP t\u00ecm th\u1ea5y c\u00e1c \u1ee9ng d\u1ee5ng \u0111a d\u1ea1ng trong m\u00f4i tr\u01b0\u1eddng d\u00e2n c\u01b0, doanh nghi\u1ec7p v\u00e0 doanh nghi\u1ec7p:<\/p>\n<ol>\n<li>\n<p><strong>S\u1eed d\u1ee5ng d\u00e2n c\u01b0<\/strong>: D\u1ecbch v\u1ee5 VoIP cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p thay th\u1ebf \u0111i\u1ec7n tho\u1ea1i gia \u0111\u00ecnh ti\u1ebft ki\u1ec7m chi ph\u00ed, th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi c\u00e1c g\u00f3i internet.<\/p>\n<\/li>\n<li>\n<p><strong>Giao ti\u1ebfp kinh doanh<\/strong>: Nhi\u1ec1u doanh nghi\u1ec7p tri\u1ec3n khai h\u1ec7 th\u1ed1ng VoIP \u0111\u1ec3 li\u00ean l\u1ea1c n\u1ed9i b\u1ed9 v\u00e0 b\u00ean ngo\u00e0i, n\u00e2ng cao hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li>\n<p><strong>Trung t\u00e2m cu\u1ed9c g\u1ecdi<\/strong>: Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 c\u00e1c t\u00ednh n\u0103ng n\u00e2ng cao c\u1ee7a VoIP khi\u1ebfn n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c trung t\u00e2m cu\u1ed9c g\u1ecdi v\u00e0 h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng.<\/p>\n<\/li>\n<li>\n<p><strong>truy\u1ec1n th\u00f4ng H\u1ee3p nh\u1ea5t<\/strong>: VoIP t\u00edch h\u1ee3p tho\u1ea1i, video v\u00e0 nh\u1eafn tin, cho ph\u00e9p li\u00ean l\u1ea1c v\u00e0 c\u1ed9ng t\u00e1c th\u1ed1ng nh\u1ea5t.<\/p>\n<\/li>\n<\/ol>\n<p>Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng VoIP c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i nh\u1eefng th\u00e1ch th\u1ee9c nh\u01b0:<\/p>\n<ul>\n<li>\n<p><strong>Nh\u1eefng v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng<\/strong>: Cu\u1ed9c g\u1ecdi VoIP c\u00f3 th\u1ec3 b\u1ecb bi\u1ebfn d\u1ea1ng gi\u1ecdng n\u00f3i ho\u1eb7c b\u1ecb r\u1edbt cu\u1ed9c g\u1ecdi do t\u1eafc ngh\u1ebdn m\u1ea1ng ho\u1eb7c kh\u00f4ng \u0111\u1ee7 b\u0103ng th\u00f4ng.<\/p>\n<\/li>\n<li>\n<p><strong>M\u1ed1i quan t\u00e2m v\u1ec1 b\u1ea3o m\u1eadt<\/strong>: H\u1ec7 th\u1ed1ng VoIP c\u00f3 th\u1ec3 d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng b\u1edfi c\u00e1c m\u1ed1i \u0111e d\u1ecda b\u1ea3o m\u1eadt nh\u01b0 nghe l\u00e9n v\u00e0 c\u01b0\u1edbp cu\u1ed9c g\u1ecdi.<\/p>\n<\/li>\n<\/ul>\n<p>\u0110\u1ec3 v\u01b0\u1ee3t qua nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y, vi\u1ec7c tri\u1ec3n khai c\u00e1c bi\u1ec7n ph\u00e1p Ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 (QoS), s\u1eed d\u1ee5ng c\u00e1c giao th\u1ee9c li\u00ean l\u1ea1c an to\u00e0n (SIP) v\u00e0 c\u00f3 t\u01b0\u1eddng l\u1eeda m\u1ea1nh m\u1ebd l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>H\u00e3y so s\u00e1nh VoIP v\u1edbi hai thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1:<\/p>\n<ol>\n<li>\n<p><strong>VoIP so v\u1edbi PSTN<\/strong>: VoIP v\u01b0\u1ee3t qua M\u1ea1ng \u0110i\u1ec7n tho\u1ea1i Chuy\u1ec3n m\u1ea1ch C\u00f4ng c\u1ed9ng (PSTN) truy\u1ec1n th\u1ed1ng v\u1ec1 chi ph\u00ed, t\u00ednh linh ho\u1ea1t v\u00e0 t\u00ednh n\u0103ng. PSTN d\u1ef1a v\u00e0o t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1, trong khi VoIP ho\u1ea1t \u0111\u1ed9ng tr\u00ean d\u1eef li\u1ec7u s\u1ed1.<\/p>\n<\/li>\n<li>\n<p><strong>VoIP so v\u1edbi truy\u1ec1n th\u00f4ng h\u1ee3p nh\u1ea5t<\/strong>: Trong khi VoIP \u0111\u1ec1 c\u1eadp c\u1ee5 th\u1ec3 \u0111\u1ebfn c\u00e1c cu\u1ed9c g\u1ecdi tho\u1ea1i qua internet, th\u00ec Truy\u1ec1n th\u00f4ng H\u1ee3p nh\u1ea5t (UC) bao g\u1ed3m nhi\u1ec1u k\u00eanh li\u00ean l\u1ea1c kh\u00e1c nhau nh\u01b0 c\u00e1c c\u00f4ng c\u1ee5 tho\u1ea1i, video, nh\u1eafn tin v\u00e0 c\u1ed9ng t\u00e1c. VoIP l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong c\u00e1c gi\u1ea3i ph\u00e1p UC.<\/p>\n<\/li>\n<\/ol>\n<h2>Tri\u1ec3n v\u1ecdng v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn VoIP<\/h2>\n<p>T\u01b0\u01a1ng lai c\u1ee7a VoIP c\u00f3 v\u1ebb \u0111\u1ea7y h\u1ee9a h\u1eb9n v\u1edbi m\u1ed9t s\u1ed1 xu h\u01b0\u1edbng m\u1edbi n\u1ed5i:<\/p>\n<ol>\n<li>\n<p><strong>T\u00edch h\u1ee3p 5G<\/strong>: Vi\u1ec7c tri\u1ec3n khai m\u1ea1ng 5G s\u1ebd n\u00e2ng cao kh\u1ea3 n\u0103ng VoIP, cho ph\u00e9p c\u00e1c cu\u1ed9c g\u1ecdi ch\u1ea5t l\u01b0\u1ee3ng cao h\u01a1n v\u00e0 \u0111\u1ed9 tr\u1ec5 th\u1ea5p h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>Tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o<\/strong>: Tr\u1ee3 l\u00fd gi\u1ecdng n\u00f3i \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng AI s\u1ebd c\u1ea3i thi\u1ec7n h\u01a1n n\u1eefa tr\u1ea3i nghi\u1ec7m c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 trong h\u1ec7 th\u1ed1ng VoIP.<\/p>\n<\/li>\n<li>\n<p><strong>Nh\u1eefng ti\u1ebfn b\u1ed9 c\u1ee7a WebRTC<\/strong>: C\u00f4ng ngh\u1ec7 WebRTC s\u1ebd ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, cho ph\u00e9p giao ti\u1ebfp theo th\u1eddi gian th\u1ef1c trong c\u00e1c tr\u00ecnh duy\u1ec7t web m\u00e0 kh\u00f4ng c\u1ea7n b\u1ed5 sung th\u00eam plugin.<\/p>\n<\/li>\n<li>\n<p><strong>VoIP d\u1ef1a tr\u00ean chu\u1ed7i kh\u1ed1i<\/strong>: C\u00f4ng ngh\u1ec7 chu\u1ed7i kh\u1ed1i c\u00f3 th\u1ec3 t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt VoIP v\u00e0 cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p truy\u1ec1n th\u00f4ng phi t\u1eadp trung.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi VoIP<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c tri\u1ec3n khai VoIP:<\/p>\n<ol>\n<li>\n<p><strong>B\u1ecf qua t\u01b0\u1eddng l\u1eeda<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 gi\u00fap l\u01b0u l\u01b0\u1ee3ng VoIP v\u01b0\u1ee3t qua c\u00e1c t\u01b0\u1eddng l\u1eeda h\u1ea1n ch\u1ebf v\u00e0 thi\u1ebft b\u1ecb NAT, \u0111\u1ea3m b\u1ea3o li\u00ean l\u1ea1c th\u00f4ng su\u1ed1t.<\/p>\n<\/li>\n<li>\n<p><strong>\u1ea9n danh<\/strong>: Cu\u1ed9c g\u1ecdi VoIP \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn qua m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 n\u00e2ng cao quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 t\u00ednh \u1ea9n danh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed1i \u01b0u h\u00f3a l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<\/strong>: Proxy c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a l\u01b0u l\u01b0\u1ee3ng VoIP, gi\u1ea3m \u0111\u1ed9 tr\u1ec5 v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c g\u1ecdi.<\/p>\n<\/li>\n<\/ol>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 VoIP, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ul>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Voice_over_IP\" target=\"_new\" rel=\"noopener nofollow\">Trang Wikipedia v\u1ec1 VoIP<\/a><\/li>\n<li><a href=\"https:\/\/www.fcc.gov\/consumers\/guides\/voice-over-internet-protocol-voip\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn VoIP c\u1ee7a \u1ee6y ban Truy\u1ec1n th\u00f4ng Li\u00ean bang (FCC)<\/a><\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, VoIP \u0111\u00e3 c\u00e1ch m\u1ea1ng h\u00f3a c\u00e1ch ch\u00fang ta giao ti\u1ebfp, cung c\u1ea5p gi\u1ea3i ph\u00e1p thay th\u1ebf hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed, linh ho\u1ea1t v\u00e0 gi\u00e0u t\u00ednh n\u0103ng cho \u0111i\u1ec7n tho\u1ea1i truy\u1ec1n th\u1ed1ng. V\u1edbi nh\u1eefng ti\u1ebfn b\u1ed9 trong c\u00f4ng ngh\u1ec7 v\u00e0 s\u1ef1 t\u00edch h\u1ee3p c\u1ee7a c\u00e1c xu h\u01b0\u1edbng m\u1edbi n\u1ed5i, VoIP s\u1eb5n s\u00e0ng ti\u1ebfp t\u1ee5c \u0111\u1ecbnh h\u00ecnh t\u01b0\u01a1ng lai c\u1ee7a truy\u1ec1n th\u00f4ng to\u00e0n c\u1ea7u. Vi\u1ec7c k\u1ebft h\u1ee3p c\u00e1c m\u00e1y ch\u1ee7 proxy s\u1ebd n\u00e2ng cao h\u01a1n n\u1eefa kh\u1ea3 n\u0103ng c\u1ee7a VoIP, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu cho nhu c\u1ea7u li\u00ean l\u1ea1c hi\u1ec7n \u0111\u1ea1i.<\/p>","protected":false},"featured_media":479569,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-479568","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>VoIP: Revolutionizing Communication with Voice over Internet Protocol<\/mark>","faq_items":[{"question":"What is VoIP, and how does it work?","answer":"<p>VoIP, which stands for Voice over Internet Protocol, is a technology that allows users to make voice calls over the internet rather than traditional phone lines. It converts analog voice signals into digital data and transmits them as packets over IP networks. At the receiving end, the digital packets are converted back into analog audio, enabling efficient and cost-effective communication.<\/p>"},{"question":"How did VoIP originate, and when was it first mentioned?","answer":"<p>The origins of VoIP can be traced back to the 1970s when the groundwork for packet-switched networks was laid. The first mention of VoIP-like technology was in 1973 when ARPANET's Network Voice Protocol (NVP) allowed users to transmit voice packets over the network. However, it gained practicality and popularity in the 1990s with the introduction of software-based applications for making calls using computers.<\/p>"},{"question":"What are the key features of VoIP?","answer":"<p>VoIP offers several key features that set it apart from traditional telephony. It is cost-effective, flexible, and scalable. VoIP supports not only voice calls but also video conferencing, instant messaging, and file sharing, making it ideal for enhanced collaboration. Additionally, VoIP can integrate with other applications, such as customer relationship management (CRM) software, enhancing productivity.<\/p>"},{"question":"What are the types of VoIP available?","answer":"<p>There are various types of VoIP solutions catering to specific needs and use cases:<\/p><ul><li><strong>IP Phones<\/strong>: Hardware-based phones that directly connect to the internet via Ethernet.<\/li><li><strong>Softphones<\/strong>: Software applications installed on computers or mobile devices for VoIP communication.<\/li><li><strong>ATA Adapters<\/strong>: Analog Telephone Adapters that enable traditional phones for VoIP usage.<\/li><li><strong>Mobile VoIP<\/strong>: VoIP applications on mobile devices utilizing cellular data or Wi-Fi.<\/li><li><strong>WebRTC<\/strong>: Real-Time Communication within web browsers without additional plugins.<\/li><\/ul>"},{"question":"How can VoIP be used, and what are the challenges?","answer":"<p>VoIP finds applications in residential, business, and call center environments. It offers cost-effective home phone alternatives and enhances business communication and collaboration. However, VoIP may face quality issues like voice distortion or call drops due to network congestion or insufficient bandwidth. Security concerns such as eavesdropping and call hijacking may also arise.<\/p>"},{"question":"What are the future prospects of VoIP?","answer":"<p>The future of VoIP looks promising with emerging trends like 5G integration, AI-driven voice assistants, advancements in WebRTC technology, and potential blockchain-based solutions. These developments are expected to further enhance call quality, user experiences, and security.<\/p>"},{"question":"How are proxy servers associated with VoIP?","answer":"<p>Proxy servers play a significant role in VoIP implementations. They can help VoIP traffic bypass restrictive firewalls and NAT devices, ensuring seamless communication. Proxy servers also enhance user privacy and anonymity during VoIP calls and can optimize traffic to improve call quality.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479568\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/479569"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=479568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}