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4.3 CALL CONTROL ............................................................................................................................................................. 50
4.3.1
Managing a CSD (Data) Call ................................................................................................................................ 50
4.3.2
Receiving a Data Call ........................................................................................................................................... 51
4.3.3
Call Control AT Commands ................................................................................................................................. 52
4.3.4
Call Status Messages............................................................................................................................................. 82
4.4 PHONE AND DATE BOOKS .......................................................................................................................................... 92
4.4.1
Directory Access Commands................................................................................................................................ 92
4.4.2
Date Book Access Commands............................................................................................................................ 111
4.4.3
System Date and Time Access Commands......................................................................................................... 115
4.5 SMS ................................................................................................................................................................................. 117
4.5.1
SMS Commands ................................................................................................................................................. 117
4.6 NETWORK ..................................................................................................................................................................... 136
4.6.1
Network Commands ........................................................................................................................................... 136
4.7 HARDWARE INFORMATION ..................................................................................................................................... 145
4.7.1
Hardware Information......................................................................................................................................... 145
4.8 AUDIO ............................................................................................................................................................................ 157
4.8.1
Audio Tone Commands ...................................................................................................................................... 158
4.8.2
+MA, Audio Control Commands ....................................................................................................................... 163
4.9 ACCESS .......................................................................................................................................................................... 170
4.9.1
Access Control Commands................................................................................................................................. 170
4.10 MODEM CONFIGURATION AND PROFILE ............................................................................................................ 181
4.10.1 Modem Register Commands............................................................................................................................... 181
4.10.2 Sleep Mode Commands ...................................................................................................................................... 190
4.10.3 Error Handling Commands ................................................................................................................................. 197
4.11 UI (USER INTERFACE) ................................................................................................................................................ 202
4.11.1 +MH, Handset Status/Control............................................................................................................................. 202
4.11.2 Unsolicited UI Status Messages.......................................................................................................................... 209
4.12 GPRS ............................................................................................................................................................................... 211
4.12.1 GPRS Commands ............................................................................................................................................... 211
4.13 NOP - COMPATIBLE .................................................................................................................................................... 226
4.13.1 IGNORED (Compatible Only) Commands ........................................................................................................ 226
4.13.2 g18 Compatibility Output Table ......................................................................................................................... 227
4.14 FAX CLASS 1................................................................................................................................................................. 228
4.14.1 Fax Commands ................................................................................................................................................... 229
4.15 FEATURES ..................................................................................................................................................................... 237
4.15.1 STK ..................................................................................................................................................................... 237
4.15.2 TCP/IP................................................................................................................................................................. 246
4.16 MUX ................................................................................................................................................................................ 259
4.16.1 Services ............................................................................................................................................................... 259
5.1 SETTING UP THE G20 (POWER ON AND INITIAL ACTIONS).............................................................................. 263
5.1.1
Init General ......................................................................................................................................................... 264
5.1.2
SIM Management................................................................................................................................................ 265
5.1.3
Registration and Call Indications........................................................................................................................ 266
98-08901C68-O
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