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18.9 Controlling Power on all Supplicants .............................................................................190
18.10 Configuring WLAN Through the User Interface ................................................................. 190
18.11 Ad hoc Networks ...................................................................................................191
18.12 Getting Started .....................................................................................................191
18.13 Code Samples .......................................................................................................191
18.14 WLAN API Elements ................................................................................................192
Chapter 19: Wireless Wide-Area Networking
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 4.2...........................................................................206
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
19.13.3 Closing Voice Over WWAN................................................................................218
19.13.4 Making a Phone Call.......................................................................................218
19.13.5 Voice Call States...........................................................................................219
19.13.6 Receiving a Phone Call....................................................................................221
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