LOGGER.finer("Send response, failed transmissions: "+exchange.getFailedTransmissionCount());
// If a response type is set, we do not mess around with it.
// Only if none is set, we have to decide for one here.
Type respType = response.getType();
if (respType == null) {
Type reqType = exchange.getCurrentRequest().getType();
if (reqType == Type.CON) {
if (exchange.getCurrentRequest().isAcknowledged()) {
// send separate response
response.setType(Type.CON);
} else {