bit0	multi-port configuration
bit1	multi-channel configuration
bit2	Power on pin 9 available
bit3	Wi-Fi available
bit4	GPRS available
bit5	serial port modes are 232, 485, and 422
bit6	serial port modes are full-duplex and half-duples

bits76543210

>>&b00000000	GE	GPRS Mode 						B,L,0-Disabled;1-Enabled (on demand);2-Enabled (permanently);	^
>>&b00000000	GA	ATDT Command Parameter			S,I,16	^
>>&b00000000	GP	GPRS Access Point Name			S,I,16	^

