index2.addCall("3300052", call3);
index2.addCall("7555909", call2);
index2.addCall("3494090", call1);
for (Subscriber s : index2.keySet()) {
PriorityQueue<SubscriberEntry> col = index2.get(s);
for (SubscriberEntry se : col) {
System.out.println(se.toString());
}
}