{"id":8945,"date":"2026-03-08T17:33:36","date_gmt":"2026-03-08T08:33:36","guid":{"rendered":"https:\/\/hasu0707.duckdns.org\/blog\/?p=8945"},"modified":"2026-03-08T17:33:38","modified_gmt":"2026-03-08T08:33:38","slug":"imsip-multimedia-subsystem","status":"publish","type":"post","link":"https:\/\/hasu0707.duckdns.org\/blog\/?p=8945","title":{"rendered":"IMS(IP Multimedia Subsystem)"},"content":{"rendered":"\n<style>\nbody {\n  font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Noto Sans\", Arial, sans-serif;\n  line-height: 1.6;\n  color: #222;\n  font-size: 16px;\n}\n\np {\n  margin: 0.8em 0;\n}\n\nh1, h2, h3, h4 {\n  font-weight: 700;\n  margin-top: 1.4em;\n  margin-bottom: 0.6em;\n  line-height: 1.25;\n}\n\nul, ol {\n  padding-left: 1.5em;\n  margin: 0.8em 0;\n}\n\nli {\n  margin: 0.4em 0;\n}\n\np code {\n  background: #f2f2f2;\n  padding: 2px 5px;\n  border-radius: 4px;\n  font-size: 0.9em;\n}\n\nblockquote {\n  border-left: 4px solid #ddd;\n  padding-left: 12px;\n  color: #555;\n  margin: 1em 0;\n}\n\ntable {\n  border-collapse: collapse;\n  margin: 1em 0;\n}\n\nth, td {\n  border: 1px solid #ddd;\n  padding: 8px 10px;\n}\n\nth {\n  background: #f6f6f6;\n}\n<\/style>\n\n<p data-start=\"0\" data-end=\"240\">IMS(IP Multimedia Subsystem)\ub294 <strong data-start=\"30\" data-end=\"110\">4G\/5G\uc5d0\uc11c VoLTE\/VoNR, SMS over IP, \uc601\uc0c1\ud1b5\ud654 \ub4f1 \uba40\ud2f0\ubbf8\ub514\uc5b4 \uc11c\ube44\uc2a4\ub97c \uc81c\uacf5\ud558\ub294 signaling \uae30\ubc18 \ucf54\uc5b4 \ub124\ud2b8\uc6cc\ud06c<\/strong>\uc785\ub2c8\ub2e4.<br data-start=\"114\" data-end=\"117\">IMS\uc758 signaling\uc740 \uc8fc\ub85c **SIP(Session Initiation Protocol)**\uc744 \uc0ac\uc6a9\ud558\uba70, \ud575\uc2ec \uc7a5\ube44\ub294 <strong data-start=\"187\" data-end=\"236\">CSCF \uacc4\uc5f4\uacfc Application Server, Media Gateway \uacc4\uc5f4<\/strong>\uc785\ub2c8\ub2e4.<\/p>\n<p data-start=\"242\" data-end=\"280\">\uc544\ub798\uc5d0 \uc694\uccad\ud558\uc2e0 \uc7a5\ube44\ub4e4\uc744 <strong data-start=\"256\" data-end=\"276\">\uc5ed\ud560 \uc911\uc2ec\uc73c\ub85c \uad6c\uc870\uc801\uc73c\ub85c \uc124\uba85<\/strong>\ud569\ub2c8\ub2e4.<\/p>\n<hr data-start=\"282\" data-end=\"285\">\n<h1 data-section-id=\"1h9qlan\" data-start=\"287\" data-end=\"306\">1. IMS \uc804\uccb4 \uad6c\uc870 (\uac1c\ub150)<\/h1>\n<p data-start=\"308\" data-end=\"339\">IMS\uc758 \ud575\uc2ec signaling \ud750\ub984\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">UE<br>|<br>P-CSCF<br>|<br>I-CSCF<br>|<br>S-CSCF<br>|<br>Application Server (TAS)<br>|<br>MGCF &rarr; MGW &rarr; PSTN<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"432\" data-end=\"436\">\ud504\ub85c\ud1a0\ucf5c<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">SIP<br>Diameter<br>RTP<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"464\" data-end=\"467\">\n<h1 data-section-id=\"t9dy5n\" data-start=\"469\" data-end=\"518\">2. P-CSCF (Proxy-Call Session Control Function)<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"520\" data-end=\"660\">\n<thead data-start=\"520\" data-end=\"531\">\n<tr data-start=\"520\" data-end=\"531\">\n<th class=\"\" data-start=\"520\" data-end=\"525\" data-col-size=\"sm\">\ud56d\ubaa9<\/th>\n<th class=\"\" data-start=\"525\" data-end=\"531\" data-col-size=\"sm\">\ub0b4\uc6a9<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"542\" data-end=\"660\">\n<tr data-start=\"542\" data-end=\"585\">\n<td data-start=\"542\" data-end=\"546\" data-col-size=\"sm\">\ud480\ub124\uc784<\/td>\n<td data-col-size=\"sm\" data-start=\"546\" data-end=\"585\">Proxy Call Session Control Function<\/td>\n<\/tr>\n<tr data-start=\"586\" data-end=\"614\">\n<td data-start=\"586\" data-end=\"589\" data-col-size=\"sm\">\uc5ed\ud560<\/td>\n<td data-start=\"589\" data-end=\"614\" data-col-size=\"sm\">IMS \ub124\ud2b8\uc6cc\ud06c\uc758 \uccab SIP \uc811\uc18d \uc9c0\uc810<\/td>\n<\/tr>\n<tr data-start=\"615\" data-end=\"639\">\n<td data-start=\"615\" data-end=\"618\" data-col-size=\"sm\">\uc704\uce58<\/td>\n<td data-start=\"618\" data-end=\"639\" data-col-size=\"sm\">UE\uc640 \uac00\uc7a5 \uac00\uae4c\uc6b4 IMS \ub178\ub4dc<\/td>\n<\/tr>\n<tr data-start=\"640\" data-end=\"660\">\n<td data-start=\"640\" data-end=\"645\" data-col-size=\"sm\">\ud504\ub85c\ud1a0\ucf5c<\/td>\n<td data-col-size=\"sm\" data-start=\"645\" data-end=\"660\">SIP \/ IPSec<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"662\" data-end=\"664\">\uc124\uba85<\/p>\n<ul data-start=\"666\" data-end=\"737\">\n<li data-section-id=\"rlptyv\" data-start=\"666\" data-end=\"703\">\n<p data-start=\"668\" data-end=\"703\">UE\uac00 IMS\uc5d0 \uc811\uc18d\ud558\uba74 <strong data-start=\"682\" data-end=\"703\">\uccab \ubc88\uc9f8\ub85c \uc5f0\uacb0\ub418\ub294 IMS \ub178\ub4dc<\/strong><\/p>\n<\/li>\n<li data-section-id=\"13x03cy\" data-start=\"704\" data-end=\"720\">\n<p data-start=\"706\" data-end=\"720\">SIP \uba54\uc2dc\uc9c0 \ud504\ub85d\uc2dc \uc5ed\ud560<\/p>\n<\/li>\n<li data-section-id=\"3hv86m\" data-start=\"721\" data-end=\"737\">\n<p data-start=\"723\" data-end=\"737\">\ubcf4\uc548 \ubc0f QoS \uc815\ucc45 \uc801\uc6a9<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"739\" data-end=\"744\">\uc8fc\uc694 \uae30\ub2a5<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">SIP \uba54\uc2dc\uc9c0 \ud504\ub85d\uc2dc<br>UE \uc778\uc99d \uc9c0\uc6d0<br>IPSec \ud130\ub110<br>SIP compression<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"801\" data-end=\"803\">\ud1b5\uc2e0<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">UE &harr; P-CSCF (SIP)<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"832\" data-end=\"835\">\n<h1 data-section-id=\"1juy3n9\" data-start=\"837\" data-end=\"869\">3. I-CSCF (Interrogating CSCF)<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"871\" data-end=\"1012\">\n<thead data-start=\"871\" data-end=\"882\">\n<tr data-start=\"871\" data-end=\"882\">\n<th class=\"\" data-start=\"871\" data-end=\"876\" data-col-size=\"sm\">\ud56d\ubaa9<\/th>\n<th class=\"\" data-start=\"876\" data-end=\"882\" data-col-size=\"md\">\ub0b4\uc6a9<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"893\" data-end=\"1012\">\n<tr data-start=\"893\" data-end=\"944\">\n<td data-start=\"893\" data-end=\"897\" data-col-size=\"sm\">\ud480\ub124\uc784<\/td>\n<td data-col-size=\"md\" data-start=\"897\" data-end=\"944\">Interrogating Call Session Control Function<\/td>\n<\/tr>\n<tr data-start=\"945\" data-end=\"971\">\n<td data-start=\"945\" data-end=\"948\" data-col-size=\"sm\">\uc5ed\ud560<\/td>\n<td data-start=\"948\" data-end=\"971\" data-col-size=\"md\">IMS \ub3c4\uba54\uc778 entry point<\/td>\n<\/tr>\n<tr data-start=\"972\" data-end=\"988\">\n<td data-start=\"972\" data-end=\"975\" data-col-size=\"sm\">\uae30\ub2a5<\/td>\n<td data-start=\"975\" data-end=\"988\" data-col-size=\"md\">\uc0ac\uc6a9\uc790 \uc704\uce58 \uc870\ud68c<\/td>\n<\/tr>\n<tr data-start=\"989\" data-end=\"1012\">\n<td data-start=\"989\" data-end=\"994\" data-col-size=\"sm\">\ud504\ub85c\ud1a0\ucf5c<\/td>\n<td data-start=\"994\" data-end=\"1012\" data-col-size=\"md\">SIP \/ Diameter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"1014\" data-end=\"1016\">\uc124\uba85<\/p>\n<ul data-start=\"1018\" data-end=\"1075\">\n<li data-section-id=\"15ss3ea\" data-start=\"1018\" data-end=\"1052\">\n<p data-start=\"1020\" data-end=\"1052\">\uc678\ubd80 \ub124\ud2b8\uc6cc\ud06c\uc5d0\uc11c IMS\ub85c \ub4e4\uc5b4\uc624\ub294 <strong data-start=\"1040\" data-end=\"1052\">\uccab SIP \uc11c\ubc84<\/strong><\/p>\n<\/li>\n<li data-section-id=\"u451k5\" data-start=\"1053\" data-end=\"1075\">\n<p data-start=\"1055\" data-end=\"1075\">\uc0ac\uc6a9\uc790 \uc704\uce58\ub97c <strong data-start=\"1063\" data-end=\"1075\">HSS\uc5d0\uc11c \uc870\ud68c<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1077\" data-end=\"1079\">\ud750\ub984<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">I-CSCF<br>|<br>Diameter<br>|<br>HSS<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"1118\" data-end=\"1120\">\uacb0\uacfc<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">S-CSCF \uc704\uce58 \ubc18\ud658<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"1144\" data-end=\"1147\">\n<h1 data-section-id=\"1bjz94h\" data-start=\"1149\" data-end=\"1175\">4. S-CSCF (Serving CSCF)<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1177\" data-end=\"1302\">\n<thead data-start=\"1177\" data-end=\"1188\">\n<tr data-start=\"1177\" data-end=\"1188\">\n<th class=\"\" data-start=\"1177\" data-end=\"1182\" data-col-size=\"sm\">\ud56d\ubaa9<\/th>\n<th class=\"\" data-start=\"1182\" data-end=\"1188\" data-col-size=\"sm\">\ub0b4\uc6a9<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1199\" data-end=\"1302\">\n<tr data-start=\"1199\" data-end=\"1244\">\n<td data-start=\"1199\" data-end=\"1203\" data-col-size=\"sm\">\ud480\ub124\uc784<\/td>\n<td data-col-size=\"sm\" data-start=\"1203\" data-end=\"1244\">Serving Call Session Control Function<\/td>\n<\/tr>\n<tr data-start=\"1245\" data-end=\"1265\">\n<td data-start=\"1245\" data-end=\"1248\" data-col-size=\"sm\">\uc5ed\ud560<\/td>\n<td data-start=\"1248\" data-end=\"1265\" data-col-size=\"sm\">IMS \ud575\uc2ec SIP \uc11c\ubc84<\/td>\n<\/tr>\n<tr data-start=\"1266\" data-end=\"1278\">\n<td data-start=\"1266\" data-end=\"1269\" data-col-size=\"sm\">\uae30\ub2a5<\/td>\n<td data-start=\"1269\" data-end=\"1278\" data-col-size=\"sm\">\uc138\uc158 \uc81c\uc5b4<\/td>\n<\/tr>\n<tr data-start=\"1279\" data-end=\"1302\">\n<td data-start=\"1279\" data-end=\"1284\" data-col-size=\"sm\">\ud504\ub85c\ud1a0\ucf5c<\/td>\n<td data-start=\"1284\" data-end=\"1302\" data-col-size=\"sm\">SIP \/ Diameter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"1304\" data-end=\"1306\">\uc124\uba85<\/p>\n<p data-start=\"1308\" data-end=\"1337\">IMS\uc5d0\uc11c <strong data-start=\"1314\" data-end=\"1337\">\uac00\uc7a5 \uc911\uc694\ud55c signaling \uc11c\ubc84<\/strong><\/p>\n<p data-start=\"1339\" data-end=\"1341\">\uae30\ub2a5<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">SIP session control<br>\uc11c\ube44\uc2a4 \ud2b8\ub9ac\uac70<br>\ub4f1\ub85d \ucc98\ub9ac<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"1386\" data-end=\"1389\">\n<p data-start=\"1391\" data-end=\"1396\">\ub4f1\ub85d \uacfc\uc815<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">UE REGISTER<br>&darr;<br>P-CSCF<br>&darr;<br>I-CSCF<br>&darr;<br>S-CSCF<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"1449\" data-end=\"1452\">\n<h1 data-section-id=\"1gpevz1\" data-start=\"1454\" data-end=\"1493\">5. TAS (Telephony Application Server)<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1495\" data-end=\"1590\">\n<thead data-start=\"1495\" data-end=\"1506\">\n<tr data-start=\"1495\" data-end=\"1506\">\n<th class=\"\" data-start=\"1495\" data-end=\"1500\" data-col-size=\"sm\">\ud56d\ubaa9<\/th>\n<th class=\"\" data-start=\"1500\" data-end=\"1506\" data-col-size=\"sm\">\ub0b4\uc6a9<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1517\" data-end=\"1590\">\n<tr data-start=\"1517\" data-end=\"1553\">\n<td data-start=\"1517\" data-end=\"1521\" data-col-size=\"sm\">\ud480\ub124\uc784<\/td>\n<td data-start=\"1521\" data-end=\"1553\" data-col-size=\"sm\">Telephony Application Server<\/td>\n<\/tr>\n<tr data-start=\"1554\" data-end=\"1573\">\n<td data-start=\"1554\" data-end=\"1557\" data-col-size=\"sm\">\uc5ed\ud560<\/td>\n<td data-start=\"1557\" data-end=\"1573\" data-col-size=\"sm\">VoLTE \uc11c\ube44\uc2a4 \ub85c\uc9c1<\/td>\n<\/tr>\n<tr data-start=\"1574\" data-end=\"1590\">\n<td data-start=\"1574\" data-end=\"1577\" data-col-size=\"sm\">\uae30\ub2a5<\/td>\n<td data-start=\"1577\" data-end=\"1590\" data-col-size=\"sm\">\ud1b5\ud654 \uc11c\ube44\uc2a4 \uc81c\uacf5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"1592\" data-end=\"1594\">\uc124\uba85<\/p>\n<p data-start=\"1596\" data-end=\"1642\">S-CSCF\uac00 \uc11c\ube44\uc2a4 \ub85c\uc9c1\uc744 \uc704\ud574 \ud638\ucd9c\ud558\ub294 <strong data-start=\"1620\" data-end=\"1642\">Application Server<\/strong><\/p>\n<p data-start=\"1644\" data-end=\"1649\">\uc11c\ube44\uc2a4 \uc608<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">Call forwarding<br>Call waiting<br>Call barring<br>VoLTE supplementary services<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"1731\" data-end=\"1733\">\uad6c\uc870<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">S-CSCF<br>|<br>SIP<br>|<br>TAS<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"1772\" data-end=\"1775\">\n<h1 data-section-id=\"1exyy42\" data-start=\"1777\" data-end=\"1805\">6. AS (Application Server)<\/h1>\n<p data-start=\"1807\" data-end=\"1834\">IMS\uc5d0\uc11c TAS\ub294 <strong data-start=\"1818\" data-end=\"1830\">AS\uc758 \ud55c \uc885\ub958<\/strong>\uc785\ub2c8\ub2e4.<\/p>\n<p data-start=\"1836\" data-end=\"1855\">IMS\uc5d0\ub294 \ub2e4\uc591\ud55c AS\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1857\" data-end=\"1962\">\n<thead data-start=\"1857\" data-end=\"1868\">\n<tr data-start=\"1857\" data-end=\"1868\">\n<th class=\"\" data-start=\"1857\" data-end=\"1862\" data-col-size=\"sm\">AS<\/th>\n<th class=\"\" data-start=\"1862\" data-end=\"1868\" data-col-size=\"sm\">\uae30\ub2a5<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1879\" data-end=\"1962\">\n<tr data-start=\"1879\" data-end=\"1896\">\n<td data-start=\"1879\" data-end=\"1883\" data-col-size=\"sm\">TAS<\/td>\n<td data-start=\"1883\" data-end=\"1896\" data-col-size=\"sm\">VoLTE \uc11c\ube44\uc2a4<\/td>\n<\/tr>\n<tr data-start=\"1897\" data-end=\"1918\">\n<td data-start=\"1897\" data-end=\"1909\" data-col-size=\"sm\">Presence AS<\/td>\n<td data-col-size=\"sm\" data-start=\"1909\" data-end=\"1918\">\uc0c1\ud0dc \uc815\ubcf4<\/td>\n<\/tr>\n<tr data-start=\"1919\" data-end=\"1939\">\n<td data-start=\"1919\" data-end=\"1932\" data-col-size=\"sm\">Messaging AS<\/td>\n<td data-start=\"1932\" data-end=\"1939\" data-col-size=\"sm\">\uba54\uc2dc\uc9d5<\/td>\n<\/tr>\n<tr data-start=\"1940\" data-end=\"1962\">\n<td data-start=\"1940\" data-end=\"1954\" data-col-size=\"sm\">Conference AS<\/td>\n<td data-start=\"1954\" data-end=\"1962\" data-col-size=\"sm\">\uc601\uc0c1\ud68c\uc758<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<hr data-start=\"1964\" data-end=\"1967\">\n<h1 data-section-id=\"1otwboo\" data-start=\"1969\" data-end=\"2011\">7. MGCF (Media Gateway Control Function)<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2013\" data-end=\"2124\">\n<thead data-start=\"2013\" data-end=\"2024\">\n<tr data-start=\"2013\" data-end=\"2024\">\n<th class=\"\" data-start=\"2013\" data-end=\"2018\" data-col-size=\"sm\">\ud56d\ubaa9<\/th>\n<th class=\"\" data-start=\"2018\" data-end=\"2024\" data-col-size=\"sm\">\ub0b4\uc6a9<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2035\" data-end=\"2124\">\n<tr data-start=\"2035\" data-end=\"2073\">\n<td data-start=\"2035\" data-end=\"2039\" data-col-size=\"sm\">\ud480\ub124\uc784<\/td>\n<td data-start=\"2039\" data-end=\"2073\" data-col-size=\"sm\">Media Gateway Control Function<\/td>\n<\/tr>\n<tr data-start=\"2074\" data-end=\"2104\">\n<td data-start=\"2074\" data-end=\"2077\" data-col-size=\"sm\">\uc5ed\ud560<\/td>\n<td data-start=\"2077\" data-end=\"2104\" data-col-size=\"sm\">SIP &harr; PSTN signaling \ubcc0\ud658<\/td>\n<\/tr>\n<tr data-start=\"2105\" data-end=\"2124\">\n<td data-start=\"2105\" data-end=\"2110\" data-col-size=\"sm\">\ud504\ub85c\ud1a0\ucf5c<\/td>\n<td data-start=\"2110\" data-end=\"2124\" data-col-size=\"sm\">SIP \/ ISUP<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"2126\" data-end=\"2128\">\uc124\uba85<\/p>\n<p data-start=\"2130\" data-end=\"2160\">IMS\uc640 <strong data-start=\"2135\" data-end=\"2151\">\uae30\uc874 \uc804\ud654\ub9dd(PSTN)<\/strong> \uc5f0\uacb0 \uc2dc \uc0ac\uc6a9.<\/p>\n<p data-start=\"2162\" data-end=\"2163\">\uc608<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">VoLTE &rarr; \uc77c\ubc18 \uc804\ud654<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"2188\" data-end=\"2191\">\n<p data-start=\"2193\" data-end=\"2195\">\ud750\ub984<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">S-CSCF<br>|<br>SIP<br>|<br>MGCF<br>|<br>ISUP<br>|<br>PSTN<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"2244\" data-end=\"2247\">\n<h1 data-section-id=\"13liq8g\" data-start=\"2249\" data-end=\"2273\">8. MGW (Media Gateway)<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2275\" data-end=\"2354\">\n<thead data-start=\"2275\" data-end=\"2286\">\n<tr data-start=\"2275\" data-end=\"2286\">\n<th class=\"\" data-start=\"2275\" data-end=\"2280\" data-col-size=\"sm\">\ud56d\ubaa9<\/th>\n<th class=\"\" data-start=\"2280\" data-end=\"2286\" data-col-size=\"sm\">\ub0b4\uc6a9<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2297\" data-end=\"2354\">\n<tr data-start=\"2297\" data-end=\"2318\">\n<td data-start=\"2297\" data-end=\"2301\" data-col-size=\"sm\">\ud480\ub124\uc784<\/td>\n<td data-start=\"2301\" data-end=\"2318\" data-col-size=\"sm\">Media Gateway<\/td>\n<\/tr>\n<tr data-start=\"2319\" data-end=\"2337\">\n<td data-start=\"2319\" data-end=\"2322\" data-col-size=\"sm\">\uc5ed\ud560<\/td>\n<td data-start=\"2322\" data-end=\"2337\" data-col-size=\"sm\">\uc74c\uc131 media \ubcc0\ud658<\/td>\n<\/tr>\n<tr data-start=\"2338\" data-end=\"2354\">\n<td data-start=\"2338\" data-end=\"2341\" data-col-size=\"sm\">\uae30\ub2a5<\/td>\n<td data-start=\"2341\" data-end=\"2354\" data-col-size=\"sm\">RTP &harr; TDM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"2356\" data-end=\"2358\">\uc124\uba85<\/p>\n<p data-start=\"2360\" data-end=\"2370\">\uc74c\uc131 \ub370\uc774\ud130\ub97c \ubcc0\ud658<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">VoLTE RTP<br>&darr;<br>PSTN TDM<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"2402\" data-end=\"2405\">\n<h1 data-section-id=\"1iv8z62\" data-start=\"2407\" data-end=\"2423\">9. IMS \uc8fc\uc694 \ud504\ub85c\ud1a0\ucf5c<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2425\" data-end=\"2513\">\n<thead data-start=\"2425\" data-end=\"2438\">\n<tr data-start=\"2425\" data-end=\"2438\">\n<th class=\"\" data-start=\"2425\" data-end=\"2432\" data-col-size=\"sm\">\ud504\ub85c\ud1a0\ucf5c<\/th>\n<th class=\"\" data-start=\"2432\" data-end=\"2438\" data-col-size=\"sm\">\uc5ed\ud560<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2449\" data-end=\"2513\">\n<tr data-start=\"2449\" data-end=\"2462\">\n<td data-start=\"2449\" data-end=\"2453\" data-col-size=\"sm\">SIP<\/td>\n<td data-start=\"2453\" data-end=\"2462\" data-col-size=\"sm\">\uc138\uc158 \uc81c\uc5b4<\/td>\n<\/tr>\n<tr data-start=\"2463\" data-end=\"2482\">\n<td data-start=\"2463\" data-end=\"2472\" data-col-size=\"sm\">Diameter<\/td>\n<td data-start=\"2472\" data-end=\"2482\" data-col-size=\"sm\">\uac00\uc785\uc790 \uc778\uc99d<\/td>\n<\/tr>\n<tr data-start=\"2483\" data-end=\"2497\">\n<td data-start=\"2483\" data-end=\"2487\" data-col-size=\"sm\">RTP<\/td>\n<td data-start=\"2487\" data-end=\"2497\" data-col-size=\"sm\">\uc74c\uc131 \ub370\uc774\ud130<\/td>\n<\/tr>\n<tr data-start=\"2498\" data-end=\"2513\">\n<td data-start=\"2498\" data-end=\"2504\" data-col-size=\"sm\">IPSec<\/td>\n<td data-start=\"2504\" data-end=\"2513\" data-col-size=\"sm\">UE \ubcf4\uc548<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<hr data-start=\"2515\" data-end=\"2518\">\n<h1 data-section-id=\"pdhr3f\" data-start=\"2520\" data-end=\"2538\">10. IMS \uc7a5\ube44 \uc5ed\ud560 \uc815\ub9ac<\/h1>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2540\" data-end=\"2903\">\n<thead data-start=\"2540\" data-end=\"2563\">\n<tr data-start=\"2540\" data-end=\"2563\">\n<th class=\"\" data-start=\"2540\" data-end=\"2545\" data-col-size=\"sm\">\uc7a5\ube44<\/th>\n<th class=\"\" data-start=\"2545\" data-end=\"2551\" data-col-size=\"sm\">\ud480\ub124\uc784<\/th>\n<th class=\"\" data-start=\"2551\" data-end=\"2556\" data-col-size=\"sm\">\uc5ed\ud560<\/th>\n<th class=\"\" data-start=\"2556\" data-end=\"2563\" data-col-size=\"sm\">\uc911\uc694\ub3c4<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2582\" data-end=\"2903\">\n<tr data-start=\"2582\" data-end=\"2622\">\n<td data-start=\"2582\" data-end=\"2589\" data-col-size=\"sm\">P-CSCF<\/td>\n<td data-start=\"2589\" data-end=\"2602\" data-col-size=\"sm\">Proxy CSCF<\/td>\n<td data-col-size=\"sm\" data-start=\"2602\" data-end=\"2614\">UE \uc811\uc18d \ud504\ub85d\uc2dc<\/td>\n<td data-col-size=\"sm\" data-start=\"2614\" data-end=\"2622\">\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr data-start=\"2623\" data-end=\"2670\">\n<td data-start=\"2623\" data-end=\"2630\" data-col-size=\"sm\">I-CSCF<\/td>\n<td data-start=\"2630\" data-end=\"2651\" data-col-size=\"sm\">Interrogating CSCF<\/td>\n<td data-col-size=\"sm\" data-start=\"2651\" data-end=\"2663\">\ub3c4\uba54\uc778 entry<\/td>\n<td data-col-size=\"sm\" data-start=\"2663\" data-end=\"2670\">\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr data-start=\"2671\" data-end=\"2714\">\n<td data-start=\"2671\" data-end=\"2678\" data-col-size=\"sm\">S-CSCF<\/td>\n<td data-start=\"2678\" data-end=\"2693\" data-col-size=\"sm\">Serving CSCF<\/td>\n<td data-col-size=\"sm\" data-start=\"2693\" data-end=\"2705\">\ud575\uc2ec SIP \uc11c\ubc84<\/td>\n<td data-col-size=\"sm\" data-start=\"2705\" data-end=\"2714\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr data-start=\"2715\" data-end=\"2757\">\n<td data-start=\"2715\" data-end=\"2719\" data-col-size=\"sm\">TAS<\/td>\n<td data-start=\"2719\" data-end=\"2734\" data-col-size=\"sm\">Telephony AS<\/td>\n<td data-start=\"2734\" data-end=\"2749\" data-col-size=\"sm\">VoLTE \uc11c\ube44\uc2a4 \ub85c\uc9c1<\/td>\n<td data-col-size=\"sm\" data-start=\"2749\" data-end=\"2757\">\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr data-start=\"2758\" data-end=\"2798\">\n<td data-start=\"2758\" data-end=\"2761\" data-col-size=\"sm\">AS<\/td>\n<td data-start=\"2761\" data-end=\"2782\" data-col-size=\"sm\">Application Server<\/td>\n<td data-start=\"2782\" data-end=\"2791\" data-col-size=\"sm\">\uc11c\ube44\uc2a4 \uc81c\uacf5<\/td>\n<td data-start=\"2791\" data-end=\"2798\" data-col-size=\"sm\">\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr data-start=\"2799\" data-end=\"2864\">\n<td data-start=\"2799\" data-end=\"2804\" data-col-size=\"sm\">MGCF<\/td>\n<td data-col-size=\"sm\" data-start=\"2804\" data-end=\"2837\">Media Gateway Control Function<\/td>\n<td data-col-size=\"sm\" data-start=\"2837\" data-end=\"2857\">PSTN interworking<\/td>\n<td data-col-size=\"sm\" data-start=\"2857\" data-end=\"2864\">\u2605\u2605\u2605<\/td>\n<\/tr>\n<tr data-start=\"2865\" data-end=\"2903\">\n<td data-start=\"2865\" data-end=\"2869\" data-col-size=\"sm\">MGW<\/td>\n<td data-start=\"2869\" data-end=\"2885\" data-col-size=\"sm\">Media Gateway<\/td>\n<td data-start=\"2885\" data-end=\"2896\" data-col-size=\"sm\">media \ubcc0\ud658<\/td>\n<td data-start=\"2896\" data-end=\"2903\" data-col-size=\"sm\">\u2605\u2605\u2605<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<hr data-start=\"2905\" data-end=\"2908\">\n<h1 data-section-id=\"bgm37r\" data-start=\"2910\" data-end=\"2937\">11. VoLTE \ud1b5\ud654 signaling \ud750\ub984<\/h1>\n<p data-start=\"2939\" data-end=\"2940\">\uc608<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">UE1 &rarr; UE2<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"2961\" data-end=\"2963\">\ud750\ub984<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">UE<br>|<br>P-CSCF<br>|<br>S-CSCF<br>|<br>TAS<br>|<br>S-CSCF<br>|<br>P-CSCF<br>|<br>UE<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"3030\" data-end=\"3033\">\n<h1 data-section-id=\"2i3z3b\" data-start=\"3035\" data-end=\"3051\">12. PSTN \ud1b5\ud654 \ud750\ub984<\/h1>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">UE (VoLTE)<br>|<br>P-CSCF<br>|<br>S-CSCF<br>|<br>MGCF<br>|<br>MGW<br>|<br>PSTN<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"3116\" data-end=\"3119\">\n<h1 data-section-id=\"y6tm4v\" data-start=\"3121\" data-end=\"3143\">13. IMS signaling \ud2b9\uc9d5<\/h1>\n<p data-start=\"3145\" data-end=\"3152\">\uae30\uc874 \uc774\ub3d9\ud1b5\uc2e0<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">SS7<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"3167\" data-end=\"3170\">IMS<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">SIP<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"3185\" data-end=\"3186\">\uc989<\/p>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"3188\" data-end=\"3268\">\n<thead data-start=\"3188\" data-end=\"3206\">\n<tr data-start=\"3188\" data-end=\"3206\">\n<th class=\"\" data-start=\"3188\" data-end=\"3193\" data-col-size=\"sm\">\uc138\ub300<\/th>\n<th class=\"\" data-start=\"3193\" data-end=\"3206\" data-col-size=\"sm\">signaling<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"3217\" data-end=\"3268\">\n<tr data-start=\"3217\" data-end=\"3227\">\n<td data-start=\"3217\" data-end=\"3220\" data-col-size=\"sm\">2G<\/td>\n<td data-start=\"3220\" data-end=\"3227\" data-col-size=\"sm\">SS7<\/td>\n<\/tr>\n<tr data-start=\"3228\" data-end=\"3238\">\n<td data-start=\"3228\" data-end=\"3231\" data-col-size=\"sm\">3G<\/td>\n<td data-start=\"3231\" data-end=\"3238\" data-col-size=\"sm\">SS7<\/td>\n<\/tr>\n<tr data-start=\"3239\" data-end=\"3253\">\n<td data-start=\"3239\" data-end=\"3246\" data-col-size=\"sm\">4G IMS<\/td>\n<td data-start=\"3246\" data-end=\"3253\" data-col-size=\"sm\">SIP<\/td>\n<\/tr>\n<tr data-start=\"3254\" data-end=\"3268\">\n<td data-start=\"3254\" data-end=\"3261\" data-col-size=\"sm\">5G IMS<\/td>\n<td data-col-size=\"sm\" data-start=\"3261\" data-end=\"3268\">SIP<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<hr data-start=\"3270\" data-end=\"3273\">\n<h1 data-section-id=\"10ogz9i\" data-start=\"3275\" data-end=\"3282\">\ud575\uc2ec \uc815\ub9ac<\/h1>\n<p data-start=\"3284\" data-end=\"3292\">IMS\uc5d0\uc11c \uc5ed\ud560<\/p>\n<div class=\"relative w-full mt-4 mb-1\">\n<div class=\"\">\n<div class=\"relative\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"h-full min-h-0 min-w-0\">\n<div class=\"border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl\">\n<div class=\"h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback\">\n<div class=\"pointer-events-none absolute end-1.5 top-1 z-2 md:end-2 md:top-1\">&nbsp;<\/div>\n<div class=\"pt-3\">\n<div class=\"relative z-0 flex max-w-full\">\n<div id=\"code-block-viewer\" class=\"q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037c5 \u037cj\" dir=\"ltr\">\n<div class=\"cm-scroller\">\n<div class=\"cm-content q9tKkq_readonly\">P-CSCF &rarr; UE \uc811\uc18d<br>I-CSCF &rarr; \ub3c4\uba54\uc778 entry<br>S-CSCF &rarr; \uc138\uc158 \uc81c\uc5b4<br>TAS &rarr; \ud1b5\ud654 \uc11c\ube44\uc2a4<br>MGCF &rarr; PSTN signaling \ubcc0\ud658<br>MGW &rarr; media \ubcc0\ud658<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"\">\n<div class=\"\">&nbsp;<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<hr data-start=\"3419\" data-end=\"3422\">\n<p data-start=\"3424\" data-end=\"3432\">\u2714 \ud55c \uc904 \ud575\uc2ec<\/p>\n<blockquote data-start=\"3434\" data-end=\"3524\">\n<p data-start=\"3436\" data-end=\"3524\">IMS\ub294 <strong data-start=\"3441\" data-end=\"3524\">SIP \uae30\ubc18 signaling \uad6c\uc870\uc774\uba70 CSCF \uacc4\uc5f4\uc774 \uc138\uc158 \uc81c\uc5b4, AS\/TAS\uac00 \uc11c\ube44\uc2a4 \ub85c\uc9c1, MGCF\/MGW\uac00 PSTN \uc5f0\ub3d9\uc744 \ub2f4\ub2f9\ud569\ub2c8\ub2e4.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>IMS(IP Multimedia Subsystem)\ub294 4G\/5G\uc5d0\uc11c VoLTE\/VoNR, SMS over IP, \uc601\uc0c1\ud1b5\ud654 \ub4f1 \uba40\ud2f0\ubbf8\ub514\uc5b4 \uc11c\ube44\uc2a4\ub97c \uc81c\uacf5\ud558\ub294 signaling \uae30\ubc18 \ucf54\uc5b4 \ub124\ud2b8\uc6cc\ud06c\uc785\ub2c8\ub2e4.IMS\uc758 signaling\uc740 \uc8fc\ub85c **SIP(Session Initiation Protocol)**\uc744 \uc0ac\uc6a9\ud558\uba70, \ud575\uc2ec \uc7a5\ube44\ub294 CSCF \uacc4\uc5f4\uacfc Application Server, Media Gateway \uacc4\uc5f4\uc785\ub2c8\ub2e4. \uc544\ub798\uc5d0 \uc694\uccad\ud558\uc2e0 \uc7a5\ube44\ub4e4\uc744 \uc5ed\ud560 \uc911\uc2ec\uc73c\ub85c \uad6c\uc870\uc801\uc73c\ub85c \uc124\uba85\ud569\ub2c8\ub2e4. 1. IMS \uc804\uccb4 \uad6c\uc870 (\uac1c\ub150) IMS\uc758 \ud575\uc2ec signaling \ud750\ub984\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. &nbsp; UE|P-CSCF|I-CSCF|S-CSCF|Application Server (TAS)|MGCF &rarr; [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[94],"tags":[],"class_list":["post-8945","post","type-post","status-publish","format-standard","hentry","category-mobile-network"],"_links":{"self":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/8945","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8945"}],"version-history":[{"count":0,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/8945\/revisions"}],"wp:attachment":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8945"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}