diff --git a/db_scripts/diff/8704.up b/db_scripts/diff/8704.up
index e1a5dc44..b703265d 100644
--- a/db_scripts/diff/8704.up
+++ b/db_scripts/diff/8704.up
@@ -3,23 +3,27 @@ USE provisioning
 INSERT INTO voip_preferences (attribute, type, usr_pref, dom_pref, peer_pref, data_type, max_occur, description)
                        VALUES('sst_enable', 0, 1, 1, 1, 'enum', 1, 'Enable SIP Session Timers.');
 
-INSERT INTO voip_preferences_enum (preference_id, label, value)
-    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_enable'), 'yes', 'yes');
-INSERT INTO voip_preferences_enum (preference_id, label, value)
-    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_enable'), 'no', 'no');
+INSERT INTO voip_preferences_enum (preference_id, label, value, usr_pref, dom_pref, peer_pref)
+    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_enable'), 'use domain default', NULL, 1, 0, 0);
+INSERT INTO voip_preferences_enum (preference_id, label, value, usr_pref, dom_pref, peer_pref)
+    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_enable'), 'yes', 'yes', 1, 1, 1);
+INSERT INTO voip_preferences_enum (preference_id, label, value, usr_pref, dom_pref, peer_pref)
+    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_enable'), 'no', 'no', 1, 1, 1);
 
 INSERT INTO voip_preferences (attribute, type, usr_pref, dom_pref, peer_pref, data_type, max_occur, description)
-                       VALUES('sst_expires', 1, 1, 1, 1, 'int', 1, 'SIP Session Timers refresh interval (seconds). SBC will make refresh at the half of this interval.');
+                       VALUES('sst_expires', 1, 1, 1, 1, 'int', 1, 'SIP Session Timers refresh interval (seconds). Should be always greater than min_timer preference. SBC will make refresh at the half of this interval.');
 INSERT INTO voip_preferences (attribute, type, usr_pref, dom_pref, peer_pref, data_type, max_occur, description)
                        VALUES('sst_min_timer', 1, 1, 1, 1, 'int', 1, 'Set Min-SE value in SBC. This is also used to build 422 reply if remote Min-SE is smaller than local Min-SE.');
 INSERT INTO voip_preferences (attribute, type, usr_pref, dom_pref, peer_pref, data_type, max_occur, description)
-                       VALUES('sst_max_timer', 1, 1, 1, 1, 'int', 1, 'Set Max-SE value in SBC. This is also used to build 422 reply if remote Max-SE is greater than local Max-SE.');
+                       VALUES('sst_max_timer', 1, 1, 1, 1, 'int', 1, 'Sets upper limit on accepted Min-SE value in in SBC.');
 INSERT INTO voip_preferences (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, internal, data_type, read_only, description)
     VALUES('sst_refresh_method', 0, 1, 1, 1, 1, 0, 'enum', 0, 'SIP Session Timers refresh method.');
 
-INSERT INTO voip_preferences_enum (preference_id, label, value)
-    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method'), 'UPDATE_FALLBACK_INVITE', 'UPDATE_FALLBACK_INVITE');
-INSERT INTO voip_preferences_enum (preference_id, label, value)
-    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method'), 'UPDATE', 'UPDATE');
-INSERT INTO voip_preferences_enum (preference_id, label, value)
-    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method'), 'INVITE', 'INVITE');
+INSERT INTO voip_preferences_enum (preference_id, label, value, usr_pref, dom_pref, peer_pref)
+    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method'), 'use domain default', NULL, 1, 0, 0);
+INSERT INTO voip_preferences_enum (preference_id, label, value, usr_pref, dom_pref, peer_pref)
+    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method'), 'UPDATE_FALLBACK_INVITE', 'UPDATE_FALLBACK_INVITE', 1, 1, 1);
+INSERT INTO voip_preferences_enum (preference_id, label, value, usr_pref, dom_pref, peer_pref)
+    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method'), 'UPDATE', 'UPDATE', 1, 1, 1);
+INSERT INTO voip_preferences_enum (preference_id, label, value, usr_pref, dom_pref, peer_pref)
+    VALUES ((SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method'), 'INVITE', 'INVITE', 1, 1, 1);