Smart Machine Smart Decision
5 Interface introduction
5.1 Overview
T900 Terminal provides the following connectors for power supply, GPIOs, Audio, ADC, Serial port and
antenna:
z The GSM antenna interface(SMA type female connector)
z The 4 PIN I/O port for power supply
z The 10 PIN I/O port for audio, GPIOs and ADC
z The standard RS232 interface
z LED indicator for power (Red) and GSM Netlight (Green)
z SIM card holder
Figure 4: T900 interface Front view
Figure 5: T900 interface Back view
Note: For the I/O interface, SIMCom could provide 4-line cable and 10-line cable (optional) to assist
developers; it will be introduced at the following chapter.
T900_User Guide_V1.02 11 2013-05-22
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