diff --git a/docs/capabilities.md b/docs/capabilities.md
index f4388a5614..c5a10c093d 100644
--- a/docs/capabilities.md
+++ b/docs/capabilities.md
@@ -132,5 +132,9 @@
 * `session-state` - Sessions can mark themselves as inactive, so the participant receives notifications again
 * `note-to-self` - Support for "Note-to-self" conversation exists
 * `recording-consent` - Whether admins and moderators can require recording consent before joining a call
+* `sip-support-dialout` - Whether admins can enable SIP dial-out
 * `config => chat => has-translation-providers` - When true, translation tuples can be loaded from the [OCS Translation API](https://docs.nextcloud.com/server/latest/developer_manual/client_apis/OCS/ocs-translation-api.html#get-available-translation-options).
 * `config => call => recording-consent` - Whether users need to consent into call recording before joining a call (see [constants list](constants.md#recording-consent-required))
+* `config => call => sip-enabled` - Whether SIP is configured on the server allowing for SIP dial-in
+* `config => call => sip-dialout-enabled` - Whether SIP dial-out is configured on the server, additionally requires `config => call => sip-enabled`
+* `config => call => can-enable-sip` - Whether the current user is a member of the groups that are allowed to enable SIP dial-in on a conversation or use SIP dial-out
diff --git a/lib/Capabilities.php b/lib/Capabilities.php
index 53996f09e8..b8b3356727 100644
--- a/lib/Capabilities.php
+++ b/lib/Capabilities.php
@@ -70,6 +70,9 @@ class Capabilities implements IPublicCapability {
 	 *                  supported-reactions: string[],
 	 *                  predefined-backgrounds: string[],
 	 *                  can-upload-background: bool,
+	 *                  sip-enabled: bool,
+	 *                  sip-dialout-enabled: bool,
+	 *                  can-enable-sip: bool,
 	 *              },
 	 *              chat: array{
 	 *                  max-length: int,
@@ -178,6 +181,8 @@ class Capabilities implements IPublicCapability {
 					'recording' => $this->talkConfig->isRecordingEnabled(),
 					'recording-consent' => $this->talkConfig->recordingConsentRequired(),
 					'supported-reactions' => ['❤️', '🎉', '👏', '👍', '👎', '😂', '🤩', '🤔', '😲', '😥'],
+					'sip-enabled' => $this->talkConfig->isSIPConfigured(),
+					'sip-dialout-enabled' => $this->talkConfig->isSIPDialOutEnabled(),
 				],
 				'chat' => [
 					'max-length' => ChatManager::MAX_CHAT_LENGTH,
@@ -261,8 +266,10 @@ class Capabilities implements IPublicCapability {
 				$quota = Util::computerFileSize($quota);
 			}
 			$capabilities['config']['call']['can-upload-background'] = $quota === 'none' || $quota > 0;
+			$capabilities['config']['call']['can-enable-sip'] = $this->talkConfig->canUserEnableSIP($user);
 		} else {
 			$capabilities['config']['call']['can-upload-background'] = false;
+			$capabilities['config']['call']['can-enable-sip'] = false;
 		}
 
 		return [
diff --git a/openapi.json b/openapi.json
index c2d151307d..f7c26648ca 100644
--- a/openapi.json
+++ b/openapi.json
@@ -655,7 +655,10 @@
                                             "recording-consent",
                                             "supported-reactions",
                                             "predefined-backgrounds",
-                                            "can-upload-background"
+                                            "can-upload-background",
+                                            "sip-enabled",
+                                            "sip-dialout-enabled",
+                                            "can-enable-sip"
                                         ],
                                         "properties": {
                                             "enabled": {
@@ -685,6 +688,15 @@
                                             },
                                             "can-upload-background": {
                                                 "type": "boolean"
+                                            },
+                                            "sip-enabled": {
+                                                "type": "boolean"
+                                            },
+                                            "sip-dialout-enabled": {
+                                                "type": "boolean"
+                                            },
+                                            "can-enable-sip": {
+                                                "type": "boolean"
                                             }
                                         }
                                     },
diff --git a/tests/php/CapabilitiesTest.php b/tests/php/CapabilitiesTest.php
index ff70c47b8a..bcb77df03d 100644
--- a/tests/php/CapabilitiesTest.php
+++ b/tests/php/CapabilitiesTest.php
@@ -143,6 +143,7 @@ class CapabilitiesTest extends TestCase {
 			'session-state',
 			'note-to-self',
 			'recording-consent',
+			'sip-support-dialout',
 			'message-expiration',
 			'reactions',
 		];
@@ -194,6 +195,8 @@ class CapabilitiesTest extends TestCase {
 						'recording' => false,
 						'recording-consent' => 0,
 						'supported-reactions' => ['❤️', '🎉', '👏', '👍', '👎', '😂', '🤩', '🤔', '😲', '😥'],
+						'sip-enabled' => false,
+						'sip-dialout-enabled' => false,
 						'predefined-backgrounds' => [
 							'1_office.jpg',
 							'2_home.jpg',
@@ -205,6 +208,7 @@ class CapabilitiesTest extends TestCase {
 							'8_space_station.jpg',
 						],
 						'can-upload-background' => false,
+						'can-enable-sip' => false,
 					],
 					'chat' => [
 						'max-length' => 32000,
@@ -319,6 +323,8 @@ class CapabilitiesTest extends TestCase {
 						'recording' => false,
 						'recording-consent' => 0,
 						'supported-reactions' => ['❤️', '🎉', '👏', '👍', '👎', '😂', '🤩', '🤔', '😲', '😥'],
+						'sip-enabled' => false,
+						'sip-dialout-enabled' => false,
 						'predefined-backgrounds' => [
 							'1_office.jpg',
 							'2_home.jpg',
@@ -330,6 +336,7 @@ class CapabilitiesTest extends TestCase {
 							'8_space_station.jpg',
 						],
 						'can-upload-background' => $canUpload,
+						'can-enable-sip' => false,
 					],
 					'chat' => [
 						'max-length' => 32000,