Motorola SYMBOL MINISCAN MSXX04 Guía de usuario Pagina 205

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193
Psion Mobile Devices Developers Guide
19
WIRELESS WIDE-AREA
NETWORKING
WIREL ESS WIDE- AREA NETW ORKING 19
19.1 Wireless Wide-Area Networking (WWAN)..........................................195
19.2 WWAN on Devices Supported by the Mobile DevicesSDK................................195
19.3 WWAN on Devices not Supported by the Mobile DevicesSDK..............................195
19.4 Supported WWAN Modems..................................................196
19.4.1 Multiplexing.....................................................196
19.4.2 Virtual Serial Port.................................................196
19.4.2.1 Using the Virtual Serial Port......................................197
19.4.2.2 Configuration...............................................197
19.4.2.3 AT Commands..............................................197
19.4.2.4 Entering AT Commands in Windows CE...............................197
19.4.3 Dial-up Data Connections.............................................198
19.4.3.1 Dial-up Data in GSM Networks.....................................198
19.4.3.2 Dial-up Data in UMTS Networks....................................198
19.4.3.3 Dial-up Data in CDMA Networks....................................199
19.4.3.4 Dial-up Data in iDEN Networks.....................................199
19.4.4 Packet Data.....................................................199
19.4.5 Summary Of Modem Differences........................................199
19.4.6 GSM Power Driver.................................................199
19.5 Initializing WWAN.......................................................200
19.5.1 Checking the Initialization Status of the WWAN Driver ..........................200
19.5.2 WWAN Driver Status Flags...........................................200
19.5.3 Initializing the WWAN Driver..........................................202
19.6 Closing WWAN ........................................................205
19.7 Connecting to the Internet.................................................206
19.7.1 Windows Embedded CE 5.0, Windows Embedded CE 6.0, Windows Mobile 2003 SE, and Windows CE
.NET 4.2206
19.7.2 Windows Mobile and Windows Embedded Hand-Held...........................208
19.7.2.1 Disconnecting from Connection Manager.............................209
19.7.3 The DbGprs.csv File...............................................209
19.7.4 Checking Packet Data Status..........................................209
19.7.5 Roaming.......................................................210
19.7.6 Connecting Manually to a WWAN Network...................................210
19.7.7 Selecting an Access Point Name (APN).....................................210
19.7.8 Connecting to a VPN ...............................................211
19.8 Access Flags...........................................................211
19.8.1 Controlling the Interaction with the GUI ....................................212
19.9 RSSI (Received Signal Strength Indicator).........................................212
19.10 WWAN API Elements......................................................213
19.11 Using SMS (Short Message Service).............................................214
19.11.1 SMS API Elements.................................................214
19.12 WWAN Supplementary Services...............................................214
19.12.1 Voice Service States................................................215
19.13 Voice Calls on a WWAN ....................................................215
19.13.1 Initializing WWAN.................................................216
19.13.2 Initializing Voice Over WWAN..........................................216
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