diff --git a/cdrs/fscdr_test.go b/cdrs/fscdr_test.go
index 165c4427d..e24334be2 100644
--- a/cdrs/fscdr_test.go
+++ b/cdrs/fscdr_test.go
@@ -180,3 +180,57 @@ func TestSearchReplaceInExtraFields(t *testing.T) {
 		t.Error("Error parsing extra fields: ", extraFields)
 	}
 }
+
+func TestDDazRSRExtraFields(t *testing.T) {
+	eFieldsCfg := []byte(`[cdrs]
+extra_fields =  ~effective_caller_id_number:s/(\d+)/+$1/
+
+`)
+	simpleJsonCdr := []byte(`{
+    "core-uuid": "feef0b51-7fdf-4c4a-878e-aff233752de2",
+    "channel_data": {
+        "state": "CS_REPORTING",
+        "direction": "inbound",
+        "state_number": "11",
+        "flags": "0=1;1=1;3=1;36=1;37=1;39=1;42=1;47=1;52=1;73=1;75=1;94=1",
+        "caps": "1=1;2=1;3=1;4=1;5=1;6=1"
+    },
+    "variables": {
+        "direction": "inbound",
+        "uuid": "86cfd6e2-dbda-45a3-b59d-f683ec368e8b",
+        "session_id": "5",
+        "accountcode": "1001",
+        "user_context": "default",
+        "effective_caller_id_name": "Extension 1001",
+        "effective_caller_id_number": "4986517174963",
+        "outbound_caller_id_name": "FreeSWITCH",
+        "outbound_caller_id_number": "0000000000"
+    },
+    "times": {
+        "created_time": "1396984221278217",
+        "profile_created_time": "1396984221278217",
+        "progress_time": "0",
+        "progress_media_time": "0",
+        "answered_time": "0",
+        "hangup_time": "0",
+        "resurrect_time": "0",
+        "transfer_time": "1396984221377035"
+    }
+}`)
+	var err error
+	cfg, err = config.NewCGRConfigFromBytes(eFieldsCfg)
+	if err != nil {
+		t.Error("Could not parse the config", err.Error())
+	} else if !reflect.DeepEqual(cfg.CDRSExtraFields, []*utils.RSRField{&utils.RSRField{Id: "effective_caller_id_number",
+		RSRule: &utils.ReSearchReplace{regexp.MustCompile(`(\d+)`), "+$1"}}}) {
+		t.Errorf("Unexpected value for config CdrsExtraFields: %v", cfg.CDRSExtraFields)
+	}
+	fsCdr, err := new(FSCdr).New(simpleJsonCdr)
+	if err != nil {
+		t.Error("Could not parse cdr", err.Error())
+	}
+	extraFields := fsCdr.GetExtraFields()
+	if extraFields["effective_caller_id_number"] != "+4986517174963" {
+		t.Error("Unexpected effective_caller_id_number received", extraFields["effective_caller_id_number"])
+	}
+}
diff --git a/config/config_test.go b/config/config_test.go
index 3cee4b504..d9c0a2437 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -21,6 +21,7 @@ package config
 import (
 	"fmt"
 	"reflect"
+	"regexp"
 	"testing"
 	"time"
 
@@ -324,6 +325,15 @@ extra_fields = extr1,extr2
 		t.Errorf("Unexpected value for CdrsExtraFields: %v", cfg.CDRSExtraFields)
 	}
 	eFieldsCfg = []byte(`[cdrs]
+extra_fields = ~effective_caller_id_number:s/(\d+)/+$1/
+`)
+	if cfg, err := NewCGRConfigFromBytes(eFieldsCfg); err != nil {
+		t.Error("Could not parse the config", err.Error())
+	} else if !reflect.DeepEqual(cfg.CDRSExtraFields, []*utils.RSRField{&utils.RSRField{Id: "effective_caller_id_number",
+		RSRule: &utils.ReSearchReplace{regexp.MustCompile(`(\d+)`), "+$1"}}}) {
+		t.Errorf("Unexpected value for config CdrsExtraFields: %v", cfg.CDRSExtraFields)
+	}
+	eFieldsCfg = []byte(`[cdrs]
 extra_fields = extr1,extr2,
 `)
 	if _, err := NewCGRConfigFromBytes(eFieldsCfg); err == nil {
@@ -335,6 +345,7 @@ extra_fields = extr1,~extr2:s/x.+/
 	if _, err := NewCGRConfigFromBytes(eFieldsCfg); err == nil {
 		t.Error("Failed to detect failed RSRParsing")
 	}
+
 }
 
 func TestCdreExtraFields(t *testing.T) {
diff --git a/utils/researchreplace_test.go b/utils/researchreplace_test.go
index 87fc961f3..e9780b120 100644
--- a/utils/researchreplace_test.go
+++ b/utils/researchreplace_test.go
@@ -31,3 +31,12 @@ func TestProcessReSearchReplace(t *testing.T) {
 		t.Error("Unexpected output from SearchReplace: ", outStr)
 	}
 }
+
+func TestProcessReSearchReplace2(t *testing.T) {
+	rsr := &ReSearchReplace{regexp.MustCompile(`(\d+)`), "+$1"}
+	source := "4986517174963"
+	expectOut := "+4986517174963"
+	if outStr := rsr.Process(source); outStr != expectOut {
+		t.Error("Unexpected output from SearchReplace: ", outStr)
+	}
+}
diff --git a/utils/rsrfield_test.go b/utils/rsrfield_test.go
index ccbe99389..ce602de8e 100644
--- a/utils/rsrfield_test.go
+++ b/utils/rsrfield_test.go
@@ -83,3 +83,12 @@ func TestNewRSRField(t *testing.T) {
 		t.Errorf("Unexpected RSRField received: %v", rsrField)
 	}
 }
+
+func TestNewRSRFieldDDz(t *testing.T) {
+	expectRSRField := &RSRField{Id: "effective_caller_id_number", RSRule: &ReSearchReplace{regexp.MustCompile(`(\d+)`), "+$1"}}
+	if rsrField, err := NewRSRField(`~effective_caller_id_number:s/(\d+)/+$1/`); err != nil {
+		t.Error(err)
+	} else if !reflect.DeepEqual(rsrField, expectRSRField) {
+		t.Errorf("Unexpected RSRField received: %v", rsrField)
+	}
+}