diff --git a/cmd/loader/loader.go b/cmd/loader/loader.go
index 5ba3d1c61..c1b1db600 100644
--- a/cmd/loader/loader.go
+++ b/cmd/loader/loader.go
@@ -51,7 +51,7 @@ func main() {
 		db.Close()
 	} else {		
 		db := godis.New(*redisserver, *redisdb, *redispass)
-		db.Set(key, string(value))
+		db.Set(key, value)
 		db.Quit()
 	}	
 	fmt.Println("Done!")
diff --git a/timespans/calldesc.go b/timespans/calldesc.go
index 96c0b6816..882efd5fd 100644
--- a/timespans/calldesc.go
+++ b/timespans/calldesc.go
@@ -1,9 +1,7 @@
 package timespans
 
 import (
-	"encoding/json"
 	"fmt"
-	"log"
 	"time"
 	"strings"
 	"strconv"
@@ -23,7 +21,7 @@ func (ap *ActivationPeriod) AddInterval(is ...*Interval) {
 	}
 }
 
-func (ap *ActivationPeriod) Store() (result string){	
+func (ap *ActivationPeriod) store() (result string){	
 	result += strconv.FormatInt(ap.ActivationTime.Unix(), 10) + ";"
 	var is string
 	for _,i := range ap.Intervals {
@@ -44,11 +42,11 @@ func (ap *ActivationPeriod) Store() (result string){
 	return 
 }
 
-func (ap *ActivationPeriod) Restore(input string) {		
+func (ap *ActivationPeriod) restore(input string) {			
 	elements := strings.Split(input, ";")	
 	unix, _ := strconv.ParseInt(elements[0], 0, 64)		
-	ap.ActivationTime = time.Unix(unix, 0)	
-	for _, is := range elements[1:len(elements) - 1]{
+	ap.ActivationTime = time.Unix(unix, 0)			
+	for _, is := range elements[1:len(elements) - 1]{		
 		i := &Interval{}
 		ise := strings.Split(is, "|")		
 		month, _ := strconv.Atoi(ise[0])
@@ -85,25 +83,27 @@ func (cd *CallDescriptor) AddActivationPeriod(aps ...*ActivationPeriod) {
 	}
 }
 
-func (cd *CallDescriptor) EncodeValues() []byte {
-	jo, err := json.Marshal(cd.ActivationPeriods)
-	if err != nil {
-		log.Print("Cannot encode intervals: ", err)
+func (cd *CallDescriptor) EncodeValues() (result string) {
+	for _, ap := range cd.ActivationPeriods {
+		result += ap.store() + "\n"
+	}
+	return 
+}
+
+func (cd *CallDescriptor) decodeValues(v string) {
+	for _, aps := range strings.Split(v, "\n") {
+		if(len(aps)>0){
+			ap := &ActivationPeriod{}
+			ap.restore(aps)
+			cd.ActivationPeriods = append(cd.ActivationPeriods, ap)
+		}
 	}
-	return jo
 }
 
 func (cd *CallDescriptor) GetKey() string {
 	return fmt.Sprintf("%s:%s:%s", cd.CstmId, cd.Subject, cd.DestinationPrefix)
 }
 
-func (cd *CallDescriptor) decodeValues(v []byte) {
-	err := json.Unmarshal(v, &cd.ActivationPeriods)
-	if err != nil {
-		log.Print("Cannot decode intervals: ", err)
-	}
-}
-
 func (cd *CallDescriptor) getActiveIntervals() (is []*Interval) {
 	now := time.Now()
 	// add a second in the future to be able to pick the active timestamp
@@ -143,7 +143,7 @@ func (cd *CallDescriptor) GetCost(sg StorageGetter) (result *CallCost, err error
 	key := cd.GetKey()
 	values, err := sg.Get(key)
 
-	cd.decodeValues([]byte(values))
+	cd.decodeValues(values)
 
 	intervals := cd.getActiveIntervals()
 	timespans := cd.splitInTimeSpans(intervals)
diff --git a/timespans/calldesc_test.go b/timespans/calldesc_test.go
index cc5ae0b6c..f44ae4dcc 100644
--- a/timespans/calldesc_test.go
+++ b/timespans/calldesc_test.go
@@ -15,7 +15,7 @@ func TestKyotoSplitSpans(t *testing.T) {
 	key := cd.GetKey()
 	values, _ := getter.Get(key)
 
-	cd.decodeValues([]byte(values))
+	cd.decodeValues(values)
 
 	intervals := cd.getActiveIntervals()
 	timespans := cd.splitInTimeSpans(intervals)
@@ -34,7 +34,7 @@ func TestRedisSplitSpans(t *testing.T) {
 	key := cd.GetKey()
 	values, _ := getter.Get(key)
 
-	cd.decodeValues([]byte(values))
+	cd.decodeValues(values)
 
 	intervals := cd.getActiveIntervals()
 	timespans := cd.splitInTimeSpans(intervals)
@@ -73,7 +73,8 @@ func TestRedisGetCost(t *testing.T) {
 }
 
 func TestApStoreRestore(t *testing.T) {
-	d := time.Date(2012, time.February, 1, 14, 30, 1, 0, time.UTC)
+	loc, _ := time.LoadLocation("Local")
+	d := time.Date(2012, time.February, 1, 14, 30, 1, 0, loc)
 	i := &Interval{Month: time.February,
 		MonthDay:  1,
 		WeekDays:  []time.Weekday{time.Wednesday, time.Thursday},
@@ -81,13 +82,13 @@ func TestApStoreRestore(t *testing.T) {
 		EndTime:   "15:00:00"}	
 	ap := ActivationPeriod{ActivationTime: d}
 	ap.AddInterval(i)
-	result := ap.Store()
-	expected := "1328106601;2|1|3,4|14:30:00|15:00:00|0|0|0|0;"
+	result := ap.store()
+	expected := "1328099401;2|1|3,4|14:30:00|15:00:00|0|0|0|0;"
 	if result != expected {
 		t.Errorf("Expected %q was %q", expected, result)
 	}
 	ap1 := ActivationPeriod{}
-	ap1.Restore(result)
+	ap1.restore(result)
 	if ap1.ActivationTime != ap.ActivationTime {
 		t.Errorf("Expected %v was %v", ap.ActivationTime, ap1.ActivationTime)
 	}
@@ -205,13 +206,13 @@ func BenchmarkDecoding(b *testing.B) {
 	
 	b.StartTimer()
 	for i := 0; i < b.N; i++ {
-		cd.decodeValues([]byte(values))
+		cd.decodeValues(values)
 	}
 }
 
 func BenchmarkRestore(b *testing.B) {	
 	ap1 := ActivationPeriod{}
 	for i := 0; i < b.N; i++ {
-		ap1.Restore("1328106601,1328106601000000000;2|1|3,4|14:30:00|15:00:00|0|0|0|0;")
+		ap1.restore("1328106601;2|1|3,4|14:30:00|15:00:00|0|0|0|0;")
 	}
 }
diff --git a/timespans/test.kch b/timespans/test.kch
index 24fa92d8d..7a60d4399 100644
Binary files a/timespans/test.kch and b/timespans/test.kch differ