... , 4 Analog inputs, Microphone and Speaker . The GSM Controller RTU5010 with 4 I/O ports, without AD inputs, ... monitoring and other applications. RTU5011 I/O interface>>>>>GSM Controller RTU5010/RTU5011 suitable for: 1. Security Alarm System application ... Alarm System, GSM SMS Alarm, GSM SMS Controller, GSM Home Automation system, Industrial Remote Controller, GPRS RTU Data Logger, GSM Telemetry, ...