diff --git a/library/SIP_Templates.ttcn b/library/SIP_Templates.ttcn
index 7ef49cf..7da56bc 100644
--- a/library/SIP_Templates.ttcn
+++ b/library/SIP_Templates.ttcn
@@ -224,6 +224,23 @@
 	deltaSec := deltaSec
 }
 
+// [RFC3455 5.4] + 3GPP 24.229 V8.7.0
+template (present) Access_net_spec tr_Access_net_spec(template (present) charstring access_type := ?,
+						      template SemicolonParam_List access_info := *) := {
+	access_type := access_type,
+	access_info := access_info
+}
+template (present) Access_net_spec tr_Access_net_spec_EUTRAN(template (present) charstring uli_str := ?) := {
+	access_type := "3GPP-E-UTRAN-FDD",
+	access_info := {tr_Param("utran-cell-id-3gpp", uli_str)}
+}
+
+// [RFC3455 5.4] + 3GPP 24.229 V8.7.0
+template (present) P_Access_Network_Info tr_P_Access_Network_Info(template (present) Access_net_spec_list access_net_specs := ?) := {
+	fieldName := P_ACCESS_NETWORK_INFO,
+	access_net_specs := access_net_specs
+}
+
 
 // [20.32]
 template (value) Require ts_Require(template (value) OptionTag_List optionsTags := {}) := {