Huawei EM770W User Manual page 10

To use the EM770W, the following interfaces and functions are supported on the DEMO board
of EM770W:
„
5V external Power Supply interface
„
Mini USB interface
„
USIM/SIM card socket
„
Main and diversity antenna interfaces
„
COM1 for RS232 serial port, high-speed supported
„
COM2 for RS232 serial port
„
Phone interface
„
Earphone interface
„
Reset switch
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