Psion Teklogix 7527S User's Guide download pdf (Page 209)

Chapter 22: Wireless Wide-Area Networking

Packet Data

Psion Teklogix Mobile Devices SDK Developers Guide 197

22.3.3.2 Dial-up Data in UMTS Networks

In general, UMTS modems should not be used for dial-up data connections.

Only the UMTS networks in Japan allow dial-up data connections. As a consequence, for modems

that support both GSM and UMTS (Novatel U530 / U630, Sierra AC850 / AC860) dial-up con-

nections are not possible once the modem has switched to UMTS (which it will do whenever

UMTS is available and no dial-up connection is already active). Also, dial-up support is very

limited in newer firmware revisions for the Novatel U630—features have been removed com-

pared to older firmware revisions.

22.3.3.3 Dial-up Data in CDMA Networks

No additional configuration is required. The modem should select the highest possible speed

(9.6kbps or 14.4kbps) automatically.

22.3.3.4 Dial-up Data in iDEN Networks

The AT command "+WS46=23;+FCLASS=0" has to be added under the Control panel Properties

-> Configure… -> Call Options -> Extra Settings.

22.3.4 Packet Data

The WWAN driver should be used for packet data connections. A packet data connection through

the virtual serial port is slightly less efficient and more difficult to configure. Therefore, only

legacy applications that are difficult to change would use the virtual serial port for a packet data

connection. The Option Globetrotter (v1, v2, Combo) and Sierra AC775 modems do not allow

packet data connections through the virtual serial port. For all GSM modems, the GPRS APN is

automatically preconfigured for the virtual port.

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Psion Teklogix 7527S User's Guide Page 209