diff --git a/src/model/SIPACK.java b/src/model/SIPACK.java
new file mode 100644
index 0000000..f0d6aa9
--- /dev/null
+++ b/src/model/SIPACK.java
@@ -0,0 +1,81 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package model;
+
+import java.util.ArrayList;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.sip.ResponseEvent;
+import javax.sip.address.Address;
+import javax.sip.address.AddressFactory;
+import javax.sip.address.URI;
+import javax.sip.header.AllowHeader;
+import javax.sip.header.CSeqHeader;
+import javax.sip.header.CallIdHeader;
+import javax.sip.header.FromHeader;
+import javax.sip.header.HeaderFactory;
+import javax.sip.header.MaxForwardsHeader;
+import javax.sip.header.SupportedHeader;
+import javax.sip.header.ToHeader;
+import javax.sip.header.ViaHeader;
+import javax.sip.message.MessageFactory;
+import javax.sip.message.Request;
+import logger.OhmLogger;
+
+/**
+ * Erstellt den Trying Header, wird als erstes gesendet sobald man einen Anruf bekommt
+ * @author Jan
+ */
+public class SIPACK
+{
+  private Request ackRequest;
+  private static final Logger lgTry = OhmLogger.getLogger();
+
+  public SIPACK(MessageFactory messageFactory, ResponseEvent responseEvent, AddressFactory addressFactory, String sipaddresse, String proxyaddresse, String myname,
+                      HeaderFactory headerFactory, long cSeq )
+  {
+    try
+    { //
+      ArrayList via = new ArrayList(); 
+      ViaHeader viaheader = (ViaHeader) responseEvent.getResponse().getHeader("Via");
+      via.add(viaheader);
+      FromHeader from = (FromHeader) responseEvent.getResponse().getHeader("From");
+      ToHeader to = (ToHeader) responseEvent.getResponse().getHeader("To");
+      CallIdHeader callID = (CallIdHeader) responseEvent.getResponse().getHeader("Call-ID");
+      MaxForwardsHeader maxForwardsHeader = headerFactory.createMaxForwardsHeader(70);
+      
+      Address addressto = addressFactory.createAddress("sip:" + myname+ "@" + proxyaddresse);
+      URI requestURI = addressto.getURI();
+      CSeqHeader cSeqHeader = headerFactory.createCSeqHeader(cSeq, "ACK");
+      
+      SupportedHeader supp = headerFactory.createSupportedHeader("replace,path,timer"); //nachschauen
+      AllowHeader allow = headerFactory.createAllowHeader("NOTIFY,INVITE,ACK,CANCEL,BYE,REFER,INFO,OPTIONS,MESSAGE");
+      //ackRequest.addHeader(supp);
+      //ackRequest.addHeader(allow);
+      
+      ackRequest = messageFactory.createRequest(requestURI, "ACK", callID, cSeqHeader, from, to, via, maxForwardsHeader);
+      lgTry.info("100-Trying Header erstellt");
+    }
+    catch (Exception ex)
+    {
+      lgTry.getLogger(SIPmodel.class.getName()).log(Level.SEVERE, null, ex);
+    }
+
+  }
+
+  /**
+   * @return the ackRequest
+   */
+  public Request getAckRequest()
+  {
+    return ackRequest;
+  }
+
+  /**
+   * @return the ackRequest
+   */
+ 
+}