... , CSD, GPRS, UDP and TCP/IP protocols Supports Modbus RTU protocols GPRS Terminal IP Address The King Pigeon ... monitoring center by RS232 port or RS485 Port, at present supports ABB,KL,HHE intelligent meters by RS485, more special meters ... . GSM Access Control System, GSM Gate Opener, etc. GPRS Telemeticas Supports Modbus RTU protocols S240