9.1.9 +MCI Indication.............................................................................................................................. 145
9.1.10 +CA Indication..............................................................................................................................145
9.1.11 +MJDC Jamming Detection.......................................................................................................146
9.1.12 +MJDC Indication........................................................................................................................147
9.1.13 +CGED, Module Cell Description.............................................................................................148
9.1.14 +CBAND, Change Radio Band.................................................................................................149
9.1.15 +GTPLMNLS, Clear Arfcn list................................................................................................... 151
10 Hardware Information........................................................................................................................................153
10.1 Hardware Information Commands.......................................................................................................153
10.1.1 +MMAD, Query and Monitor ADC Value................................................................................. 153
10.1.2 +MTSM, Temperature Sensor Measurement......................................................................... 154
10.1.3 +CBC, Battery Charger Connection.........................................................................................156
10.1.4 +CBAUD, Baud Rate Regulation..............................................................................................157
10.1.5 +IPR, Local Terminal Serial Port Rate..................................................................................... 158
10.1.6 &K, RTS/CTS Flow Control....................................................................................................... 160
10.1.7 +IFC, RTS/CTS Flow Control....................................................................................................161
10.1.8 &C, Circuit 109 Behavior............................................................................................................162
10.1.9 &D, Circuit 108 Behavior............................................................................................................163
10.1.10 +CFUN, Shut Down Phone Functionality............................................................................. 164
10.1.11 +ICF, DTE-DCE Character Framing...................................................................................... 166
10.1.12 +MRST, Perform Hardware power down.............................................................................. 167
10.1.13 +WRIM, RI signal width setting.............................................................................................. 167
10.1.14 +MSMPD, Enable/Disable SIM Card Hot Plug.................................................................... 169
10.1.15 +GTWD, Enable/Disable Watchdog...................................................................................... 170
10.2 UART2 Configuration............................................................................................................................. 170
10.2.1 +GTSET=āUARTMODEā, switch UART2 work mode........................................................... 171
10.2.2 +GTSET=āUARTREVā, report data mode...............................................................................171
10.2.3 +UARTSEND, Send data to UART2........................................................................................ 171
10.2.4 UART2 use for AT Command....................................................................................................172
11 Audio..................................................................................................................................................................... 174
11.1 Scope........................................................................................................................................................ 174
11.2 General Audio Commands.................................................................................................................... 174
11.2.1 +CRSL, Call Ringer Level.......................................................................................................... 174
11.2.2 +CLVL, Loudspeaker Volume....................................................................................................175
11.2.3 +CMUT, Mute/Unmute Microphone Path................................................................................ 175
11.2.4 S94, Sidetone Effect................................................................................................................... 176
11.2.5 S96, Echo Canceling.................................................................................................................. 177
11.2.6 +CALM, Alert Sound Mode........................................................................................................ 177
11.2.7 +VTD, Tone Duration.................................................................................................................. 178