@Override
	public void handleMessages(Inbox inbox) {
		if(!isSending) { // don't even look at incoming messages
			return;
		}
		if(inbox.hasNext()) {
			Message msg = inbox.next();
			if(msg instanceof S1Message) {
				S1Message m = (S1Message) msg;
				if(next != null) {
					m.data += increment;
					DelayTimer dt = new DelayTimer(m, this, m.data);
					dt.startRelative(m.data, this);
				}
			}
		}
	}