/** Handle a answer request */
  public boolean handleAnswerRequest(Interlocutor interlocutor) {

    // cancel call request if no Media Locator
    if (PhoneManager.isUseStaticLocator() && PhoneManager.isUsingMediaLocator()) {
      return false;
    }

    PhoneManager.setUsingMediaLocator(true);

    SessionDescription sdpData = null;
    try {
      sdpData = mediaManager.generateSdpDescription();
      interlocutor.getCall().setLocalSdpDescription(sdpData);
    } catch (MediaException ex) {
      try {
        sipManager.sendServerInternalError(interlocutor.getID());
      } catch (CommunicationsException ex1) {
        Log.error("handleAnswerRequest", ex1);
      }
      return false;
    }
    try {
      sipManager.answerCall(interlocutor.getID(), sdpData.toString());
    } catch (CommunicationsException exc) {
      Log.error("handleAnswerRequest", exc);
      return false;
    }
    return true;
  }