. 9 Error Codes ......... 13 Examples on How to Use the AT Commands ......... 15 SMS Text Mode ......... 15 GPRS Communication ... 17 Call Control....... 19 AT+CPIN ATA ATD ATH ATL ATO ATP ATT ATX AT+CHUP AT+CMOD AT+CVHU AT+VTD AT+VTS ATQ ATS0 ATS2 A.

GR47

GR-10

GR-100

GR-12530-CVC

GR-165

GR-18260-CVC

GR-225

GR-24130-CVC

GR-25

GR-300

GR-3548-CVC

GR-5

GR-50