{"id":477629,"date":"2023-08-09T09:18:01","date_gmt":"2023-08-09T09:18:01","guid":{"rendered":""},"modified":"2023-09-05T11:15:07","modified_gmt":"2023-09-05T11:15:07","slug":"integrated-service-digital-network","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/integrated-service-digital-network\/","title":{"rendered":"M\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1 d\u1ecbch v\u1ee5 t\u00edch h\u1ee3p"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p>M\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1 d\u1ecbch v\u1ee5 t\u00edch h\u1ee3p (ISDN) l\u00e0 c\u00f4ng ngh\u1ec7 m\u1ea1ng vi\u1ec5n th\u00f4ng cho ph\u00e9p truy\u1ec1n \u0111\u1ed3ng th\u1eddi gi\u1ecdng n\u00f3i, d\u1eef li\u1ec7u v\u00e0 video tr\u00ean c\u00f9ng m\u1ed9t k\u00eanh k\u1ef9 thu\u1eadt s\u1ed1. N\u00f3 th\u1ec3 hi\u1ec7n s\u1ef1 ti\u1ebfn b\u1ed9 \u0111\u00e1ng k\u1ec3 trong kh\u1ea3 n\u0103ng giao ti\u1ebfp, cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cao. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o l\u1ecbch s\u1eed, c\u1ea5u tr\u00fac, t\u00ednh n\u0103ng, lo\u1ea1i, \u1ee9ng d\u1ee5ng v\u00e0 tri\u1ec3n v\u1ecdng trong t\u01b0\u01a1ng lai c\u1ee7a ISDN, c\u00f9ng v\u1edbi m\u1ed1i quan h\u1ec7 c\u1ee7a n\u00f3 v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 proxy.<\/p>\n<h2>Ngu\u1ed3n g\u1ed1c v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp s\u1edbm c\u1ee7a ISDN<\/h2>\n<p>Kh\u00e1i ni\u1ec7m ISDN l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c \u0111\u01b0a ra v\u00e0o nh\u1eefng n\u0103m 1970 nh\u1eb1m \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng v\u1ec1 truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1. N\u0103m 1972, \u1ee6y ban T\u01b0 v\u1ea5n \u0110i\u1ec7n tho\u1ea1i v\u00e0 \u0110i\u1ec7n b\u00e1o Qu\u1ed1c t\u1ebf (CCITT, nay l\u00e0 ITU-T) \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t \u00fd t\u01b0\u1edfng v\u1ec1 m\u1ed9t m\u1ea1ng t\u00edch h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 c\u00f3 th\u1ec3 x\u1eed l\u00fd \u0111\u1ed3ng th\u1eddi tho\u1ea1i v\u00e0 d\u1eef li\u1ec7u. M\u00e3i \u0111\u1ebfn nh\u1eefng n\u0103m 1980, ISDN m\u1edbi b\u1eaft \u0111\u1ea7u c\u00f3 s\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 tri\u1ec3n khai \u0111\u00e1ng k\u1ec3.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 ISDN<\/h2>\n<p>ISDN cung c\u1ea5p k\u1ebft n\u1ed1i k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u1ea7u cu\u1ed1i, thay th\u1ebf m\u1ea1ng analog truy\u1ec1n th\u1ed1ng b\u1eb1ng m\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1. N\u00f3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1c \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i b\u1eb1ng \u0111\u1ed3ng hi\u1ec7n c\u00f3, gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00e0 d\u1ec5 d\u00e0ng ti\u1ebfp c\u1eadn. K\u1ebft n\u1ed1i ISDN ti\u00eau chu\u1ea9n bao g\u1ed3m hai k\u00eanh B 64 kbps (kilobit m\u1ed7i gi\u00e2y), th\u00edch h\u1ee3p \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 m\u1ed9t k\u00eanh D 16 kbps, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch b\u00e1o hi\u1ec7u v\u00e0 \u0111i\u1ec1u khi\u1ec3n.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a ISDN<\/h2>\n<p>M\u1ea1ng ISDN c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh hai th\u00e0nh ph\u1ea7n ch\u00ednh:<\/p>\n<ol>\n<li>\n<p><strong>Giao di\u1ec7n m\u1ea1ng ng\u01b0\u1eddi d\u00f9ng (UNI)<\/strong>: \u0110\u00e2y l\u00e0 giao di\u1ec7n gi\u1eefa thi\u1ebft b\u1ecb c\u1ee7a kh\u00e1ch h\u00e0ng v\u00e0 m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 t\u1ed5ng \u0111\u00e0i \u0111\u1ecba ph\u01b0\u01a1ng. UNI c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai b\u1eb1ng nhi\u1ec1u giao di\u1ec7n kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 Giao di\u1ec7n t\u1ed1c \u0111\u1ed9 c\u01a1 b\u1ea3n (BRI) ho\u1eb7c Giao di\u1ec7n t\u1ed1c \u0111\u1ed9 ch\u00ednh (PRI).<\/p>\n<\/li>\n<li>\n<p><strong>Giao di\u1ec7n n\u00fat m\u1ea1ng (NNI)<\/strong>: Giao di\u1ec7n n\u00e0y k\u1ebft n\u1ed1i m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 t\u1ed5ng \u0111\u00e0i c\u1ee5c b\u1ed9 v\u1edbi m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 t\u1ed5ng \u0111\u00e0i. N\u00f3 \u0111\u1ea3m b\u1ea3o li\u00ean l\u1ea1c li\u1ec1n m\u1ea1ch gi\u1eefa c\u00e1c nh\u00e0 m\u1ea1ng kh\u00e1c nhau.<\/p>\n<\/li>\n<\/ol>\n<p>ISDN ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch s\u1ed1 h\u00f3a t\u00edn hi\u1ec7u tho\u1ea1i, d\u1eef li\u1ec7u v\u00e0 video r\u1ed3i truy\u1ec1n ch\u00fang d\u01b0\u1edbi d\u1ea1ng g\u00f3i qua k\u00eanh k\u1ef9 thu\u1eadt s\u1ed1. B\u1ed9 chuy\u1ec3n m\u1ea1ch ISDN x\u1eed l\u00fd vi\u1ec7c thi\u1ebft l\u1eadp cu\u1ed9c g\u1ecdi, b\u00e1o hi\u1ec7u v\u00e0 \u0111\u1ecbnh tuy\u1ebfn \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i gi\u1eefa ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a ISDN<\/h2>\n<p>ISDN cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng thi\u1ebft y\u1ebfu khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb:<\/p>\n<ol>\n<li>\n<p><strong>Truy\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1<\/strong>: Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c m\u1ea1ng analog truy\u1ec1n th\u1ed1ng, ISDN s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng truy\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1, gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 r\u00f5 c\u1ee7a gi\u1ecdng n\u00f3i v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<li>\n<p><strong>D\u1ecbch v\u1ee5 t\u00edch h\u1ee3p<\/strong>: \u0110\u00fang nh\u01b0 t\u00ean g\u1ecdi, ISDN t\u00edch h\u1ee3p nhi\u1ec1u d\u1ecbch v\u1ee5 kh\u00e1c nhau nh\u01b0 tho\u1ea1i, d\u1eef li\u1ec7u v\u00e0 video, cung c\u1ea5p m\u1ed9t n\u1ec1n t\u1ea3ng th\u1ed1ng nh\u1ea5t cho truy\u1ec1n th\u00f4ng.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed1c \u0111\u1ed9 cao<\/strong>: ISDN c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u l\u00ean t\u1edbi 128 kbps tr\u00ean Giao di\u1ec7n t\u1ed1c \u0111\u1ed9 c\u01a1 b\u1ea3n (BRI) v\u00e0 th\u1eadm ch\u00ed cao h\u01a1n tr\u00ean Giao di\u1ec7n t\u1ed1c \u0111\u1ed9 ch\u00ednh (PRI).<\/p>\n<\/li>\n<li>\n<p><strong>\u0111\u1ed9 tin c\u1eady<\/strong>: ISDN cung c\u1ea5p k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u00e1ng tin c\u1eady, \u0111\u1ea3m b\u1ea3o m\u1ea5t d\u1eef li\u1ec7u t\u1ed1i thi\u1ec3u v\u00e0 gi\u1ea3m \u0111\u1ed9 tr\u1ec5.<\/p>\n<\/li>\n<li>\n<p><strong>Ti\u00eau chu\u1ea9n to\u00e0n c\u1ea7u<\/strong>: ISDN l\u00e0 ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1edfi ITU-T, \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c m\u1ea1ng kh\u00e1c nhau.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i ISDN<\/h2>\n<p>C\u00f3 hai lo\u1ea1i ISDN ch\u00ednh:<\/p>\n<ol>\n<li>\n<p><strong>Giao di\u1ec7n t\u1ef7 l\u1ec7 c\u01a1 b\u1ea3n (BRI)<\/strong>: BRI \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng cho khu d\u00e2n c\u01b0 v\u00e0 doanh nghi\u1ec7p nh\u1ecf. N\u00f3 bao g\u1ed3m hai k\u00eanh B 64 kbps v\u00e0 m\u1ed9t k\u00eanh D 16 kbps. T\u1ed5ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u l\u00e0 144 kbps.<\/p>\n<\/li>\n<li>\n<p><strong>Giao di\u1ec7n t\u1ed1c \u0111\u1ed9 ch\u00ednh (PRI)<\/strong>: PRI \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c doanh nghi\u1ec7p l\u1edbn h\u01a1n v\u1edbi nhu c\u1ea7u li\u00ean l\u1ea1c cao h\u01a1n. N\u00f3 bao g\u1ed3m 23 k\u00eanh B v\u00e0 m\u1ed9t k\u00eanh D 64 kbps \u1edf B\u1eafc M\u1ef9 (30 k\u00eanh B \u1edf Ch\u00e2u \u00c2u) v\u00e0 cung c\u1ea5p t\u1ed5ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u l\u00e0 1,544 Mbps (2,048 Mbps \u1edf Ch\u00e2u \u00c2u).<\/p>\n<\/li>\n<\/ol>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh n\u00eau b\u1eadt s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa BRI v\u00e0 PRI:<\/p>\n<table>\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>BRI<\/th>\n<th>PRI<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>K\u00eanh B<\/td>\n<td>2 (m\u1ed7i c\u00e1i 64 kbps)<\/td>\n<td>23 (m\u1ed7i c\u00e1i 64 kbps)<\/td>\n<\/tr>\n<tr>\n<td>K\u00eanh D<\/td>\n<td>1 (16 kbps)<\/td>\n<td>1 (64 kbps)<\/td>\n<\/tr>\n<tr>\n<td>T\u1ed5ng t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u<\/td>\n<td>144 kbps<\/td>\n<td>1,544 Mb\/gi\u00e2y (B\u1eafc M\u1ef9)<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td>2,048 Mb\/gi\u00e2y (Ch\u00e2u \u00c2u)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>S\u1eed d\u1ee5ng ISDN: \u1ee8ng d\u1ee5ng, Th\u00e1ch th\u1ee9c v\u00e0 Gi\u1ea3i ph\u00e1p<\/h2>\n<p>ISDN \u0111\u00e3 t\u00ecm th\u1ea5y c\u00e1c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, bao g\u1ed3m:<\/p>\n<ul>\n<li>\n<p><strong>H\u1ed9i ngh\u1ecb truy\u1ec1n h\u00ecnh<\/strong>: T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u cao v\u00e0 k\u1ebft n\u1ed1i \u0111\u00e1ng tin c\u1eady c\u1ee7a ISDN khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p cho h\u1ed9i ngh\u1ecb truy\u1ec1n h\u00ecnh th\u1eddi gian th\u1ef1c.<\/p>\n<\/li>\n<li>\n<p><strong>Truy\u1ec1n d\u1eef li\u1ec7u<\/strong>: N\u00f3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n truy\u1ec1n d\u1eef li\u1ec7u nhanh ch\u00f3ng v\u00e0 an to\u00e0n, l\u00fd t\u01b0\u1edfng cho c\u00e1c doanh nghi\u1ec7p y\u00eau c\u1ea7u trao \u0111\u1ed5i d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li>\n<p><strong>Truy c\u1eadp t\u1eeb xa<\/strong>: ISDN cho ph\u00e9p truy c\u1eadp t\u1eeb xa v\u00e0o m\u1ea1ng n\u1ed9i b\u1ed9, cho ph\u00e9p l\u00e0m vi\u1ec7c t\u1eeb xa v\u00e0 v\u1eadn h\u00e0nh t\u1eeb xa.<\/p>\n<\/li>\n<\/ul>\n<p>M\u1eb7c d\u00f9 c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m nh\u01b0ng ISDN v\u1eabn ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c trong nh\u1eefng n\u0103m qua, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u0103ng th\u00f4ng h\u1ea1n ch\u1ebf so v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi h\u01a1n nh\u01b0 b\u0103ng th\u00f4ng r\u1ed9ng. Tuy nhi\u00ean, c\u00e1c gi\u1ea3i ph\u00e1p nh\u01b0 t\u00edch h\u1ee3p ISDN v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 kh\u00e1c \u0111\u00e3 gi\u00fap gi\u1ea3i quy\u1ebft nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y.<\/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>ISDN th\u01b0\u1eddng \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u00f4ng kh\u00e1c. H\u00e3y so s\u00e1nh n\u00f3 v\u1edbi hai c\u00e1i n\u1ed5i b\u1eadt:<\/p>\n<ol>\n<li><strong>ISDN so v\u1edbi PSTN (M\u1ea1ng \u0111i\u1ec7n tho\u1ea1i chuy\u1ec3n m\u1ea1ch c\u00f4ng c\u1ed9ng)<\/strong>:<\/li>\n<\/ol>\n<table>\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>ISDN<\/th>\n<th>PSTN<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Truy\u1ec1n d\u1eef li\u1ec7u<\/td>\n<td>\u0110i\u1ec7n t\u1eed<\/td>\n<td>T\u01b0\u01a1ng t\u1ef1<\/td>\n<\/tr>\n<tr>\n<td>D\u1ecbch v\u1ee5<\/td>\n<td>t\u00edch h\u1ee3p<\/td>\n<td>Ch\u1ee7 y\u1ebfu l\u00e0 gi\u1ecdng n\u00f3i<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u<\/td>\n<td>Cao<\/td>\n<td>V\u1eeba ph\u1ea3i<\/td>\n<\/tr>\n<tr>\n<td>B\u0103ng th\u00f4ng<\/td>\n<td>Gi\u1edbi h\u1ea1n<\/td>\n<td>Gi\u1edbi h\u1ea1n<\/td>\n<\/tr>\n<tr>\n<td>kh\u1ea3 d\u1ee5ng<\/td>\n<td>Ph\u1ed5 bi\u1ebfn r\u1ed9ng r\u00e3i<\/td>\n<td>Ph\u1ed5 bi\u1ebfn r\u1ed9ng r\u00e3i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ol start=\"2\">\n<li><strong>ISDN so v\u1edbi DSL (\u0110\u01b0\u1eddng d\u00e2y thu\u00ea bao k\u1ef9 thu\u1eadt s\u1ed1)<\/strong>:<\/li>\n<\/ol>\n<table>\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>ISDN<\/th>\n<th>DSL<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>C\u00f4ng ngh\u1ec7<\/td>\n<td>chuy\u1ec3n m\u1ea1ch<\/td>\n<td>Chuy\u1ec3n m\u1ea1ch g\u00f3i<\/td>\n<\/tr>\n<tr>\n<td>T\u1ed1c \u0111\u1ed9<\/td>\n<td>L\u00ean t\u1edbi 128 kbps<\/td>\n<td>L\u00ean t\u1edbi v\u00e0i Mbps<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1ch s\u1eed d\u1ee5ng<\/td>\n<td>Tho\u1ea1i, D\u1eef li\u1ec7u, Video<\/td>\n<td>Ch\u1ec9 th\u00f4ng tin<\/td>\n<\/tr>\n<tr>\n<td>Kho\u1ea3ng c\u00e1ch<\/td>\n<td>Gi\u1edbi h\u1ea1n b\u1edfi kho\u1ea3ng c\u00e1ch<\/td>\n<td>Kho\u1ea3ng c\u00e1ch xa c\u00f3 th\u1ec3<\/td>\n<\/tr>\n<tr>\n<td>Tr\u1ecb gi\u00e1<\/td>\n<td>V\u1eeba ph\u1ea3i<\/td>\n<td>Thay \u0111\u1ed5i theo k\u1ebf ho\u1ea1ch<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai<\/h2>\n<p>M\u1eb7c d\u00f9 ISDN \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i tr\u01b0\u1edbc \u0111\u00e2y nh\u01b0ng c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi h\u01a1n nh\u01b0 c\u00e1p quang, c\u00e1p v\u00e0 truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y \u0111ang \u0111\u01b0\u1ee3c ch\u00fa \u00fd. Tuy nhi\u00ean, ISDN v\u1eabn c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 khu v\u1ef1c c\u1ee5 th\u1ec3 n\u01a1i c\u00e1c l\u1ef1a ch\u1ecdn thay th\u1ebf t\u1ed1c \u0111\u1ed9 cao b\u1ecb h\u1ea1n ch\u1ebf. H\u01a1n n\u1eefa, khi nhu c\u1ea7u v\u1ec1 c\u00e1c d\u1ecbch v\u1ee5 t\u00edch h\u1ee3p ti\u1ebfp t\u1ee5c t\u0103ng, di s\u1ea3n c\u1ee7a ISDN c\u00f3 th\u1ec3 truy\u1ec1n c\u1ea3m h\u1ee9ng cho c\u00e1c c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u00f4ng trong t\u01b0\u01a1ng lai \u0111\u1ec3 n\u00e2ng cao h\u01a1n n\u1eefa kh\u1ea3 n\u0103ng c\u1ee7a ch\u00fang.<\/p>\n<h2>ISDN v\u00e0 m\u00e1y ch\u1ee7 proxy<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p, c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng song song v\u1edbi ISDN \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng quy\u1ec1n ri\u00eang t\u01b0, b\u1ea3o m\u1eadt v\u00e0 ki\u1ec3m so\u00e1t truy c\u1eadp. B\u1eb1ng c\u00e1ch \u0111\u1ecbnh tuy\u1ebfn d\u1eef li\u1ec7u qua m\u00e1y ch\u1ee7 trung gian, d\u1ecbch v\u1ee5 proxy c\u00f3 th\u1ec3 che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, cho ph\u00e9p duy\u1ec7t web \u1ea9n danh v\u00e0 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda tr\u00ean m\u1ea1ng. M\u1eb7c d\u00f9 ISDN v\u00e0 m\u00e1y ch\u1ee7 proxy ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau nh\u01b0ng ch\u00fang c\u00f3 th\u1ec3 b\u1ed5 sung cho nhau trong c\u00e1c t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 \u0111\u1ec3 mang l\u1ea1i tr\u1ea3i nghi\u1ec7m duy\u1ec7t web v\u00e0 giao ti\u1ebfp to\u00e0n di\u1ec7n h\u01a1n.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 M\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1 d\u1ecbch v\u1ee5 t\u00edch h\u1ee3p (ISDN), b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li>\n<p><a href=\"https:\/\/www.itu.int\/rec\/T-REC-I.430\/en\" target=\"_new\" rel=\"noopener nofollow\">Khuy\u1ebfn ngh\u1ecb ITU-T I.430: Giao di\u1ec7n m\u1ea1ng ng\u01b0\u1eddi d\u00f9ng ISDN \u2013 \u0110\u1eb7c t\u1ea3 l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/a><\/p>\n<\/li>\n<li>\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/broadband-access\/integrated-services-digital-network-isdn\/34417-isdn-basics.html\" target=\"_new\" rel=\"noopener nofollow\">ISDN c\u01a1 b\u1ea3n \u2013 Cisco<\/a><\/p>\n<\/li>\n<li>\n<p><a href=\"https:\/\/www.diffen.com\/difference\/DSL_vs_ISDN\" target=\"_new\" rel=\"noopener nofollow\">ISDN so v\u1edbi DSL \u2013 Kh\u00e1c bi\u1ec7t<\/a><\/p>\n<\/li>\n<li>\n<p><a href=\"https:\/\/oneproxy.pro\/vn\/blog\/\" target=\"_new\" rel=\"noopener\">M\u00e1y ch\u1ee7 proxy v\u00e0 c\u00f4ng d\u1ee5ng c\u1ee7a ch\u00fang \u2013 Blog OneProxy<\/a><\/p>\n<\/li>\n<\/ol>\n<h2>Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n<p>M\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1 d\u1ecbch v\u1ee5 t\u00edch h\u1ee3p (ISDN) l\u00e0 m\u1ed9t c\u1ed9t m\u1ed1c quan tr\u1ecdng trong s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a vi\u1ec5n th\u00f4ng. M\u1eb7c d\u00f9 c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi h\u01a1n \u0111ang d\u1eabn \u0111\u1ea7u nh\u01b0ng di s\u1ea3n c\u1ee7a ISDN v\u1eabn t\u1ed3n t\u1ea1i v\u00e0 ti\u1ebfp t\u1ee5c h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng thi\u1ebft y\u1ebfu. V\u1edbi c\u00e1c d\u1ecbch v\u1ee5 t\u00edch h\u1ee3p, t\u1ed1c \u0111\u1ed9 cao v\u00e0 \u0111\u1ed9 tin c\u1eady, ISDN \u0111\u00e3 \u0111\u1ec3 l\u1ea1i t\u00e1c \u0111\u1ed9ng l\u00e2u d\u00e0i \u0111\u1ebfn c\u00e1ch ch\u00fang ta giao ti\u1ebfp. Khi c\u00f4ng ngh\u1ec7 ti\u1ebfn b\u1ed9, nh\u1eefng \u0111\u00f3ng g\u00f3p c\u1ee7a ISDN s\u1ebd v\u1eabn l\u00e0 y\u1ebfu t\u1ed1 n\u1ec1n t\u1ea3ng trong vi\u1ec7c \u0111\u1ecbnh h\u00ecnh t\u01b0\u01a1ng lai c\u1ee7a c\u00e1c m\u1ea1ng truy\u1ec1n th\u00f4ng.<\/p>","protected":false},"featured_media":477630,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477629","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Integrated Service Digital Network (ISDN) - A Comprehensive Overview<\/mark>","faq_items":[{"question":"What is Integrated Service Digital Network (ISDN)?","answer":"<p>Integrated Service Digital Network (ISDN) is a telecommunications network technology that enables the simultaneous transmission of voice, data, and video over a single digital channel. It offers high-speed, reliable communication by digitizing signals and sending them in packets over digital lines.<\/p>"},{"question":"How did ISDN originate, and when was it first introduced?","answer":"<p>The concept of ISDN was first proposed by the International Telegraph and Telephone Consultative Committee (CCITT) in 1972 as a fully integrated network for voice and data. Significant development and deployment started in the 1980s.<\/p>"},{"question":"What are the key features of ISDN?","answer":"<p>ISDN offers digital transmission, integrated services for voice, data, and video, high-speed connectivity, reliability, and it is an international standard regulated by ITU-T.<\/p>"},{"question":"What are the main types of ISDN?","answer":"<p>There are two main types of ISDN - Basic Rate Interface (BRI) and Primary Rate Interface (PRI). BRI is suitable for residential and small business use with two B-channels and one D-channel, while PRI is designed for larger enterprises with multiple B-channels and a higher data transfer rate.<\/p>"},{"question":"How does ISDN work internally?","answer":"<p>ISDN comprises the User Network Interface (UNI), connecting customer equipment to the carrier's network, and the Network Node Interface (NNI), linking local and interexchange carrier networks. It digitizes and packets voice, data, and video signals, and the ISDN switch handles call setup and routing.<\/p>"},{"question":"What are the applications of ISDN?","answer":"<p>ISDN finds applications in video conferencing, data transfer, and remote access to internal networks. Its high-speed and reliability make it valuable in various communication scenarios.<\/p>"},{"question":"How does ISDN compare to other technologies like PSTN and DSL?","answer":"<p>Compared to Public Switched Telephone Network (PSTN), ISDN offers digital transmission, integrated services, and higher signal quality. When compared to Digital Subscriber Line (DSL), ISDN has a circuit-switched technology, lower speed, supports voice, data, and video, and has a limited distance.<\/p>"},{"question":"What are the future prospects of ISDN?","answer":"<p>While newer technologies have emerged, ISDN's legacy continues to inspire future communication technologies. It remains relevant in regions with limited high-speed alternatives and specific applications.<\/p>"},{"question":"How does ISDN work with proxy servers?","answer":"<p>Proxy servers, like OneProxy, can work alongside ISDN to enhance privacy and security. Proxy services route data through an intermediary server, masking the user's IP address and providing anonymous browsing. Although they serve different purposes, they can complement each other for a more comprehensive communication and browsing experience.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477629","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\/477629\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/477630"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}