{"id":3850,"date":"2025-11-14T00:00:00","date_gmt":"2025-11-14T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/voip-voice-over-internet-protocol-fundamentals\/"},"modified":"2026-06-22T09:54:32","modified_gmt":"2026-06-22T09:54:32","slug":"voip-voice-over-internet-protocol-fundamentals","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/voip-voice-over-internet-protocol-fundamentals","title":{"rendered":"Giao th\u1ee9c tho\u1ea1i qua Internet (VoIP) \u2013 C\u00e1c nguy\u00ean l\u00fd c\u01a1 b\u1ea3n v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"518\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a891d90212194a0f817542ae0aff7a96.webp\" alt=\"What is VoIP?\" class=\"wp-image-3846\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a891d90212194a0f817542ae0aff7a96.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a891d90212194a0f817542ae0aff7a96-300x130.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a891d90212194a0f817542ae0aff7a96-1024x442.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a891d90212194a0f817542ae0aff7a96-768x332.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a891d90212194a0f817542ae0aff7a96-18x8.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcde \u0110\u1ecbnh ngh\u0129a &amp; T\u1ed5ng quan K\u1ef9 thu\u1eadt<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25cf VoIP l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Giao th\u1ee9c Truy\u1ec1n gi\u1ecdng n\u00f3i qua Internet (VoIP)<\/strong> l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 cho ph\u00e9p <strong>truy\u1ec1n th\u00f4ng tho\u1ea1i v\u00e0 \u0111a ph\u01b0\u01a1ng ti\u1ec7n qua c\u00e1c m\u1ea1ng IP<\/strong> thay v\u00ec c\u00e1c m\u1ea1ch \u0111i\u1ec7n tho\u1ea1i truy\u1ec1n th\u1ed1ng. \u00c2m thanh t\u01b0\u01a1ng t\u1ef1 \u0111\u01b0\u1ee3c s\u1ed1 h\u00f3a, \u0111\u00f3ng g\u00f3i th\u00e0nh c\u00e1c g\u00f3i d\u1eef li\u1ec7u v\u00e0 truy\u1ec1n qua c\u00e1c li\u00ean k\u1ebft Ethernet ho\u1eb7c WAN, sau \u0111\u00f3 \u0111\u01b0\u1ee3c t\u00e1i t\u1ea1o t\u1ea1i \u0111\u1ea7u nh\u1eadn. S\u1ef1 chuy\u1ec3n \u0111\u1ed5i n\u00e0y cho ph\u00e9p tho\u1ea1i ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00f9ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng v\u1edbi d\u1eef li\u1ec7u, gi\u00fap gi\u1ea3m chi ph\u00ed v\u00e0 t\u0103ng t\u00ednh linh ho\u1ea1t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25cf V\u00ec sao VoIP quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VoIP bi\u1ebfn \u0111\u1ed5i vi\u1ec5n th\u00f4ng truy\u1ec1n th\u1ed1ng b\u1eb1ng c\u00e1ch h\u1ed9i t\u1ee5 tho\u1ea1i v\u00e0 d\u1eef li\u1ec7u l\u00ean m\u1ed9t m\u1ea1ng duy nh\u1ea5t. C\u00e1c m\u1ea1ng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u h\u01b0\u1edfng l\u1ee3i t\u1eeb vi\u1ec7c \u0111\u01a1n gi\u1ea3n h\u00f3a h\u1ec7 th\u1ed1ng c\u00e1p, gi\u1ea3m chi ph\u00ed v\u00e0 t\u00edch h\u1ee3p c\u00e1c t\u00ednh n\u0103ng n\u00e2ng cao. \u0110\u1ed9 ch\u00ednh x\u00e1c cao <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">B\u1ed9 n\u1ed1i RJ45<\/a> and <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\">B\u1ed9 bi\u1ebfn \u00e1p LAN<\/a> l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 nguy\u00ean v\u1eb9n t\u00edn hi\u1ec7u, gi\u1ea3m thi\u1ec3u \u0111\u1ed9 tr\u1ec5 v\u00e0 duy tr\u00ec kh\u1ea3 n\u0103ng truy\u1ec1n th\u00f4ng tho\u1ea1i \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcde Ki\u1ebfn tr\u00fac K\u1ef9 thu\u1eadt &amp; T\u1eadp giao th\u1ee9c<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >L\u1edbp T\u00edn hi\u1ec7u v\u00e0 Truy\u1ec1n th\u00f4ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c giao th\u1ee9c VoIP ch\u1ee7 ch\u1ed1t bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>SIP (Giao th\u1ee9c Kh\u1edfi t\u1ea1o Phi\u00ean):<\/strong> X\u1eed l\u00fd thi\u1ebft l\u1eadp, \u0111i\u1ec1u ch\u1ec9nh v\u00e0 ch\u1ea5m d\u1ee9t cu\u1ed9c g\u1ecdi.<\/p><\/li><li><p><strong>RTP (Giao th\u1ee9c Truy\u1ec1n t\u1ea3i Th\u1eddi gian Th\u1ef1c):<\/strong> Truy\u1ec1n lu\u1ed3ng tho\u1ea1i v\u00e0 video.<\/p><\/li><li><p><strong>Giao v\u1eadn UDP:<\/strong> Gi\u1ea3m thi\u1ec3u \u0111\u1ed9 tr\u1ec5 v\u00e0 tr\u00e1nh c\u00e1c \u0111\u1ed9 tr\u1ec5 do truy\u1ec1n l\u1ea1i \u2014 v\u1ed1n s\u1ebd l\u00e0m gi\u00e1n \u0111o\u1ea1n truy\u1ec1n th\u00f4ng th\u1eddi gian th\u1ef1c.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2n nh\u1eafc v\u1ec1 Giao di\u1ec7n M\u1ea1ng v\u00e0 Ph\u1ea7n c\u1ee9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VoIP ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c giao di\u1ec7n Ethernet hi\u1ec7u su\u1ea5t cao. <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>B\u1ed9 n\u1ed1i RJ45 LINK\u2011PP c\u00f3 b\u1ed9 bi\u1ebfn \u00e1p t\u00edch h\u1ee3p<\/strong><\/a> \u0111\u1ea3m b\u1ea3o t\u1ed5n hao ch\u00e8n th\u1ea5p, hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/emc-ems-emi-electromagnetic-compatibility-susceptibility-interference\/\">EMC\/EMI<\/a> v\u00e0 truy\u1ec1n t\u00edn hi\u1ec7u \u1ed5n \u0111\u1ecbnh. C\u00e1c bi\u1ebfn \u00e1p LAN cung c\u1ea5p c\u00e1ch ly v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 nguy\u00ean v\u1eb9n t\u00edn hi\u1ec7u \u2014 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng tho\u1ea1i tr\u00ean c\u00e1c m\u1ea1ng IP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Chuy\u1ec3n \u0111\u1ed5i Truy\u1ec1n th\u00f4ng v\u00e0 C\u1ed5ng k\u1ebft n\u1ed1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u1ed5ng k\u1ebft n\u1ed1i cho ph\u00e9p VoIP giao ti\u1ebfp v\u1edbi m\u1ea1ng \u0111i\u1ec7n tho\u1ea1i c\u00f4ng c\u1ed9ng (PSTN) ho\u1eb7c c\u00e1c m\u1ea1ng \u0111i\u1ec7n tho\u1ea1i k\u1ebf th\u1eeba, \u0111\u1ed3ng th\u1eddi chuy\u1ec3n \u0111\u1ed5i c\u1ea3 giao th\u1ee9c t\u00edn hi\u1ec7u l\u1eabn lu\u1ed3ng truy\u1ec1n th\u00f4ng. C\u00e1c k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ed9 n\u1ed1i RJ45 v\u00e0 bi\u1ebfn \u00e1p h\u1ed7 tr\u1ee3 c\u00e1c ph\u00e9p chuy\u1ec3n \u0111\u1ed5i n\u00e0y m\u00e0 kh\u00f4ng l\u00e0m suy gi\u1ea3m hi\u1ec7u n\u0103ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"349\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/29c63d565d5546179ba55e8f581480b4.webp\" alt=\"How VoIP Works\" class=\"wp-image-3847\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/29c63d565d5546179ba55e8f581480b4.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/29c63d565d5546179ba55e8f581480b4-300x87.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/29c63d565d5546179ba55e8f581480b4-1024x298.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/29c63d565d5546179ba55e8f581480b4-768x223.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/29c63d565d5546179ba55e8f581480b4-18x5.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcde C\u00e1c Th\u00f4ng s\u1ed1 Hi\u1ec7u n\u0103ng C\u1ed1t l\u00f5i &amp; Ch\u1ea5t l\u01b0\u1ee3ng D\u1ecbch v\u1ee5 (<\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/qos-quality-of-service-guide-network-performance\/\"><strong>QoS<\/strong><\/a><strong>)<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 tr\u1ec5, \u0110\u1ed9 m\u00e9o th\u1eddi gian (Jitter) &amp; M\u1ea5t g\u00f3i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 duy tr\u00ec truy\u1ec1n th\u00f4ng tho\u1ea1i t\u1ef1 nhi\u00ean:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ed9 tr\u1ec5 m\u1ed9t chi\u1ec1u:<\/strong> \u2264100\u202fms (l\u00fd t\u01b0\u1edfng), hi\u1ebfm khi &gt;150\u202fms<\/p><\/li><li><p><strong>\u0110\u1ed9 bi\u1ebfn thi\u00ean \u0111\u1ed9 tr\u1ec5 (jitter):<\/strong> \u226430\u201340\u202fms<\/p><\/li><li><p><strong>M\u1ea5t g\u00f3i:<\/strong> \u22641\u20133\u202f%<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c ch\u1ec9 s\u1ed1 MOS &amp; QoE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec3m \u0111\u00e1nh gi\u00e1 \u00fd ki\u1ebfn trung b\u00ecnh (MOS)<\/strong> \u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng tho\u1ea1i c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c t\u1eeb 1,0 \u0111\u1ebfn 5,0. C\u00e1c codec tho\u1ea1i nh\u01b0 G.711 th\u01b0\u1eddng \u0111\u1ea1t MOS kho\u1ea3ng 4,5 trong \u0111i\u1ec1u ki\u1ec7n m\u1ea1ng t\u1ed1i \u01b0u. Vi\u1ec7c duy tr\u00ec \u0111\u1ed9 tr\u1ec5 th\u1ea5p, \u0111\u1ed9 bi\u1ebfn thi\u00ean \u0111\u1ed9 tr\u1ec5 (jitter) th\u1ea5p v\u00e0 t\u1ef7 l\u1ec7 m\u1ea5t g\u00f3i th\u1ea5p \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng (QoE) cao cho c\u00e1c h\u1ec7 th\u1ed1ng VoIP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >H\u1ec7 qu\u1ea3 \u0111\u1ed1i v\u1edbi ph\u1ea7n c\u1ee9ng v\u00e0 m\u1ea1ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7u n\u0103ng VoIP ph\u1ee5 thu\u1ed9c v\u00e0o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>G\u1eafn th\u1ebb VLAN v\u00e0 QoS \u0111\u1ec3 \u01b0u ti\u00ean l\u01b0u l\u01b0\u1ee3ng tho\u1ea1i<\/p><\/li><li><p>C\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u1edbi b\u1ed9 \u0111\u1ec7m t\u1ed1i thi\u1ec3u<\/p><\/li><li><p>C\u00e1c \u0111\u1ea7u n\u1ed1i RJ45 v\u00e0 th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng (magnetics) ch\u1ea5t l\u01b0\u1ee3ng cao<\/p><\/li><li><p>Gi\u00e1m s\u00e1t th\u1eddi gian th\u1ef1c \u0111\u1ed1i v\u1edbi \u0111\u1ed9 tr\u1ec5, \u0111\u1ed9 bi\u1ebfn thi\u00ean \u0111\u1ed9 tr\u1ec5 (jitter) v\u00e0 t\u1ef7 l\u1ec7 m\u1ea5t g\u00f3i<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcde \u1ee8ng d\u1ee5ng v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 \u0110i\u1ec7n tho\u1ea1i IP doanh nghi\u1ec7p v\u00e0 h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng t\u00edch h\u1ee3p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VoIP l\u00e0m n\u1ec1n t\u1ea3ng cho \u0111i\u1ec7n tho\u1ea1i IP, ph\u1ea7n m\u1ec1m kh\u00e1ch (soft client) v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng t\u00edch h\u1ee3p. C\u00e1c \u0111\u1ea7u n\u1ed1i RJ45 h\u1ed7 tr\u1ee3 c\u1ea5p ngu\u1ed3n qua Ethernet (PoE) cho ph\u00e9p truy\u1ec1n t\u1ea3i c\u1ea3 tho\u1ea1i v\u00e0 ngu\u1ed3n \u0111i\u1ec7n tr\u00ean m\u1ed9t c\u00e1p duy nh\u1ea5t, gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 Trung t\u00e2m li\u00ean h\u1ec7 (contact centers) v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai VoIP m\u1eadt \u0111\u1ed9 cao trong trung t\u00e2m d\u1eef li\u1ec7u \u0111\u00f2i h\u1ecfi thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng v\u00e0 m\u1ea1ng m\u1ea1nh m\u1ebd, bao g\u1ed3m c\u00e1c giao di\u1ec7n RJ45 t\u1ed1c \u0111\u1ed9 cao, th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng (magnetics) v\u00e0 c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch duy tr\u00ec \u0111\u01b0\u1ee3c c\u00e1c ch\u1ec9 s\u1ed1 QoS.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 H\u1ed9i t\u1ee5 tho\u1ea1i\/video trong m\u1ea1ng 5G v\u00e0 m\u1ea1ng c\u1ea1nh (edge networks)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VoIP \u0111ang ph\u00e1t tri\u1ec3n th\u00e0nh VoLTE v\u00e0 tho\u1ea1i\/video tr\u00ean m\u1ea1ng 5G NR, d\u1ef1a v\u00e0o c\u00e1c giao di\u1ec7n Ethernet \u0111\u00e1ng tin c\u1eady. C\u00e1c \u0111\u1ea7u n\u1ed1i RJ45 t\u1ed1c \u0111\u1ed9 cao v\u00e0 bi\u1ebfn \u00e1p LAN c\u1ee7a LINK\u2011PP h\u1ed7 tr\u1ee3 c\u00e1c m\u1ea1ng h\u1ed9i t\u1ee5 n\u00e0y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcde C\u00e1c l\u1ee3i th\u1ebf, th\u00e1ch th\u1ee9c v\u00e0 y\u1ebfu t\u1ed1 c\u1ea7n c\u00e2n nh\u1eafc trong thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c l\u1ee3i th\u1ebf ch\u00ednh<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Chi ph\u00ed th\u1ea5p h\u01a1n so v\u1edbi \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i truy\u1ec1n th\u1ed1ng<\/p><\/li><li><p>Tri\u1ec3n khai linh ho\u1ea1t tr\u00ean <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/local-area-network-lan-modern-networking-fast-secure-connections\/\">LAN<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-wide-area-network\/\">WAN<\/a>, ho\u1eb7c Internet<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng h\u1ed9i t\u1ee5 tho\u1ea1i, video v\u00e0 d\u1eef li\u1ec7u<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng d\u1ec5 d\u00e0ng cho doanh nghi\u1ec7p v\u00e0 c\u00e1c \u0111\u1ecba \u0111i\u1ec3m t\u1eeb xa<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c th\u00e1ch th\u1ee9c k\u1ef9 thu\u1eadt<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 (QoS) cho l\u01b0u l\u01b0\u1ee3ng tho\u1ea1i th\u1eddi gian th\u1ef1c<\/p><\/li><li><p>B\u1ea3o m\u1eadt ch\u1ed1ng nghe l\u00e9n, t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 (DoS) v\u00e0 gian l\u1eadn<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng PSTN c\u0169<\/p><\/li><li><p>Thi\u1ebft k\u1ebf \u0111\u1ea7u n\u1ed1i RJ45 v\u00e0 bi\u1ebfn \u00e1p LAN ch\u1ea5t l\u01b0\u1ee3ng cao nh\u1eb1m \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 tr\u1ec5 v\u00e0 t\u00edn hi\u1ec7u<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c h\u1ec7 qu\u1ea3 thi\u1ebft k\u1ebf \u0111\u1ed1i v\u1edbi th\u00e0nh ph\u1ea7n LINK\u2011PP<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1ea3m thi\u1ec3u t\u1ed5n hao ch\u00e8n (insertion loss), sai l\u1ec7ch th\u1eddi gian (skew) v\u00e0 nhi\u1ec5u xuy\u00ean k\u00eanh (crosstalk)<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o c\u00e1ch ly v\u00e0 h\u1ed7 tr\u1ee3 PoE trong <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\">B\u1ed9 bi\u1ebfn \u00e1p LAN<\/a><\/p><\/li><li><p>Duy tr\u00ec ng\u00e2n s\u00e1ch \u0111\u1ed9 tr\u1ec5 \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u n\u0103ng \u1edf m\u1ee9c tho\u1ea1i<\/p><\/li><li><p>C\u00e1c giao di\u1ec7n h\u01b0\u1edbng t\u1edbi t\u01b0\u01a1ng lai cho Ethernet Gigabit v\u00e0 \u0111a Gigabit<\/p><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5955a3a19ded4ee1b5a02617d93e0841.webp\" alt=\"LINK\u2011PP Solution for VoIP Deployments\" class=\"wp-image-3848\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5955a3a19ded4ee1b5a02617d93e0841.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5955a3a19ded4ee1b5a02617d93e0841-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5955a3a19ded4ee1b5a02617d93e0841-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5955a3a19ded4ee1b5a02617d93e0841-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5955a3a19ded4ee1b5a02617d93e0841-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcde T\u00f3m t\u1eaft v\u00e0 tri\u1ec3n v\u1ecdng<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VoIP bi\u1ebfn \u0111\u1ed5i c\u00e1c ph\u01b0\u01a1ng th\u1ee9c truy\u1ec1n th\u00f4ng tho\u1ea1i b\u1eb1ng c\u00e1ch khai th\u00e1c c\u00e1c m\u1ea1ng IP, mang l\u1ea1i hi\u1ec7u qu\u1ea3 chi ph\u00ed, t\u00ednh linh ho\u1ea1t v\u00e0 s\u1ef1 h\u1ed9i t\u1ee5 v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 d\u1eef li\u1ec7u. C\u00e1c k\u1ef9 s\u01b0 v\u00e0 chuy\u00ean gia t\u00edch h\u1ee3p ph\u1ea3i thi\u1ebft k\u1ebf c\u1ea9n th\u1eadn c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng v\u00e0 l\u1ef1a ch\u1ecdn ph\u1ea7n c\u1ee9ng hi\u1ec7u n\u0103ng cao \u0111\u1ec3 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng tho\u1ea1i. <strong>LINK\u2011PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>B\u1ed9 n\u1ed1i RJ45<\/strong><\/a><strong> and <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\"><strong>B\u1ed9 bi\u1ebfn \u00e1p LAN<\/strong><\/a> \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p VoIP \u0111\u00e1ng tin c\u1eady, \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cao cho c\u00e1c m\u1ea1ng doanh nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i, trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng truy\u1ec1n th\u00f4ng h\u1ed9i t\u1ee5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi 5G, \u0111i\u1ec7n to\u00e1n bi\u00ean v\u00e0 truy\u1ec1n th\u00f4ng th\u1ed1ng nh\u1ea5t ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, nhu c\u1ea7u v\u1ec1 c\u00e1c giao di\u1ec7n Ethernet v\u00e0 b\u1ed9 bi\u1ebfn \u00e1p (magnetics) m\u1ea1nh m\u1ebd s\u1ebd gia t\u0103ng, khi\u1ebfn c\u00e1c th\u00e0nh ph\u1ea7n LINK\u2011PP tr\u1edf n\u00ean thi\u1ebft y\u1ebfu cho c\u00e1c tri\u1ec3n khai VoIP th\u1ebf h\u1ec7 ti\u1ebfp theo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcde C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p \u2013 Giao th\u1ee9c tho\u1ea1i qua Internet (VoIP)<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eefng thi\u1ebft b\u1ecb n\u00e0o y\u00eau c\u1ea7u \u0111\u1ea7u n\u1ed1i RJ45 t\u01b0\u01a1ng th\u00edch v\u1edbi VoIP?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u0111i\u1ec3m cu\u1ed1i VoIP nh\u01b0 \u0111i\u1ec7n tho\u1ea1i IP, ph\u1ea7n m\u1ec1m kh\u00e1ch (soft clients), c\u1ed5ng (gateways), b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn (routers) v\u00e0 b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng (network switches) ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c \u0111\u1ea7u n\u1ed1i RJ45 ch\u1ea5t l\u01b0\u1ee3ng cao c\u00f3 t\u00edch h\u1ee3p b\u1ed9 bi\u1ebfn \u00e1p (magnetics). Nh\u1eefng th\u00e0nh ph\u1ea7n n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u, \u0111\u1ed9 tr\u1ec5 t\u1ed1i thi\u1ec3u v\u00e0 kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i tho\u1ea1i\/d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady qua Ethernet.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 bi\u1ebfn \u00e1p LAN c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c g\u1ecdi VoIP nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\">Bi\u1ebfn \u00e1p LAN (m\u1ea1ng \u0111i\u1ec7n t\u1eeb) <\/a>cung c\u1ea5p c\u00e1ch ly \u0111i\u1ec7n, gi\u1ea3m nhi\u1ec5u EMI\/EMC v\u00e0 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m thi\u1ec3u \u0111\u1ed9 tr\u1ec5, \u0111\u1ed9 m\u00e9o ti\u1ebfng (jitter) v\u00e0 m\u1ea5t g\u00f3i tin\u2014nh\u1eefng y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ed1i v\u1edbi kh\u1ea3 n\u0103ng truy\u1ec1n th\u00f4ng VoIP r\u00f5 r\u00e0ng v\u00e0 \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c ch\u1ec9 s\u1ed1 m\u1ea1ng quan tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t VoIP l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t ch\u00ednh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ed9 tr\u1ec5:<\/strong> \u2264100\u202fms theo m\u1ed9t chi\u1ec1u l\u00e0 l\u00fd t\u01b0\u1edfng<\/p><\/li><li><p><strong>\u0110\u1ed9 bi\u1ebfn thi\u00ean \u0111\u1ed9 tr\u1ec5 (jitter):<\/strong> \u226430\u201340\u202fms<\/p><\/li><li><p><strong>M\u1ea5t g\u00f3i:<\/strong> \u22641\u20133\u202f%<br\/>Vi\u1ec7c duy tr\u00ec c\u00e1c ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111i\u1ec3m MOS cao (Mean Opinion Score) v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng tho\u1ea1i xu\u1ea5t s\u1eafc.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >VoIP c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng c\u00f9ng C\u00f4ng ngh\u1ec7 C\u1ea5p ngu\u1ed3n qua Ethernet (PoE) kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3. C\u00e1c \u0111\u1ea7u n\u1ed1i RJ45 h\u1ed7 tr\u1ee3 PoE cho ph\u00e9p thi\u1ebft b\u1ecb VoIP nh\u1eadn c\u1ea3 ngu\u1ed3n \u0111i\u1ec7n v\u00e0 d\u1eef li\u1ec7u qua m\u1ed9t c\u00e1p Ethernet duy nh\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c tri\u1ec3n khai v\u00e0 ph\u1ed5 bi\u1ebfn trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/rj45-magnetic-jacks-in-voip-phones\/\">\u0111i\u1ec7n tho\u1ea1i IP<\/a> v\u00e0 c\u1ed5ng k\u1ebft n\u1ed1i (gateway) d\u1ef1a tr\u00ean IP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Ph\u1ea7n c\u1ee9ng LINK\u2011PP h\u1ed7 tr\u1ee3 vi\u1ec7c tri\u1ec3n khai VoIP t\u1ea1i doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u n\u1ed1i RJ45 v\u00e0 bi\u1ebfn \u00e1p LAN LINK\u2011PP \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ed5n hao ch\u00e8n th\u1ea5p, xuy\u00ean \u00e2m t\u1ed1i thi\u1ec3u v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u EMI cao. Ch\u00fang \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 Ch\u1ea5t l\u01b0\u1ee3ng D\u1ecbch v\u1ee5 (QoS) \u0111\u1ed1i v\u1edbi l\u01b0u l\u01b0\u1ee3ng tho\u1ea1i, h\u1ed7 tr\u1ee3 PoE, \u0111\u1ed3ng th\u1eddi t\u01b0\u01a1ng th\u00edch v\u1edbi Ethernet Gigabit v\u00e0 \u0111a-Gigabit\u2014\u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng truy\u1ec1n th\u00f4ng VoIP \u1ed5n \u0111\u1ecbnh v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cao trong c\u00e1c m\u1ea1ng quy m\u00f4 l\u1edbn.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 c\u00e1ch VoIP cho ph\u00e9p h\u1ed9i t\u1ee5 tho\u1ea1i-d\u1eef li\u1ec7u tr\u00ean m\u1ea1ng Ethernet. T\u00ecm hi\u1ec3u c\u00e1c giao th\u1ee9c then ch\u1ed1t, c\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 (QoS) v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 li\u00ean quan \u0111\u1ebfn ph\u1ea7n c\u1ee9ng cho c\u00e1c h\u1ec7 th\u1ed1ng m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>","protected":false},"author":1,"featured_media":3849,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[22,23,24],"class_list":["post-3850","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-integrated-rj45-connectors","tag-link-pp-lan-transformers","tag-link-pp"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=3850"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3850\/revisions"}],"predecessor-version":[{"id":11554,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3850\/revisions\/11554"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3849"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}