docs: public synchronized void addAdditionalInfo(int infoType, byte[] info)
  	{
  		if (infoType < 0 || infoType >= ADDINFO_ESC)
  			throw new KNXIllegalArgumentException("info type out of range [0..254]");
  		if (!checkAddInfoLength(infoType, info.length))
  			throw new KNXIllegalArgumentException("wrong info data length, expected "
  				+ ADDINFO_LENGTHS[infoType] + " bytes");
  		putAddInfo(infoType, info);
  	}