diff --git a/db_scripts/diff/8704.down b/db_scripts/diff/8704.down
new file mode 100644
index 00000000..253b358a
--- /dev/null
+++ b/db_scripts/diff/8704.down
@@ -0,0 +1,6 @@
+DELETE FROM voip_preferences_enum WHERE preference_id = (SELECT id FROM voip_preferences WHERE attribute = 'sst_refresh_method');
+DELETE FROM provisioning.voip_preferences where attribute = 'sst_enable';
+DELETE FROM provisioning.voip_preferences where attribute = 'sst_expires';
+DELETE FROM provisioning.voip_preferences where attribute = 'sst_min_timer';
+DELETE FROM provisioning.voip_preferences where attribute = 'sst_max_timer';
+DELETE FROM provisioning.voip_preferences where attribute = 'sst_refresh_method';
diff --git a/db_scripts/diff/8704.up b/db_scripts/diff/8704.up
new file mode 100644
index 00000000..cc8586bb
--- /dev/null
+++ b/db_scripts/diff/8704.up
@@ -0,0 +1,19 @@
+USE provisioning
+
+INSERT INTO voip_preferences (attribute, type, usr_pref, dom_pref, peer_pref, data_type, max_occur, description)
+                       VALUES('sst_enable', 1, 1, 1, 1, 'boolean', 1, 'Enable SIP Session Timers.');
+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.');
+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.');
+INSERT INTO voip_preferences (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, internal, data_type, read_only, description)
+    VALUES('sst_refresh_method', 1, 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');