
Chapter 19: Wireless Wide-Area Networking
Supported WWAN Modems
Psion Mobile Devices Developers Guide
196
19.4 Supported WWAN Modems
Psion computers support a number of WWAN modems. They come in either PC, or CF, card form, or they
are built-in and connect to an expansion port inside the computer. The Mobile Devices SDK makes it
possible to develop applications without having a detailed knowledge of the specific WWAN modem.
The following table lists the WWAN modems that are officially supported on Psion computers.
Note 1: This modem is no longer available.
Other third-party WWAN modems are referenced in this chapter and may be made to work, but support for
them will be limited. Consult your local Psion support representative before proceeding with development
on a modem not listed here.
19.4.1 Multiplexing
Most WWAN modems have only one serial port. Some modems can operate in multiplexing mode.
While a modem without a multiplexing mode has a packet connection, it cannot provide status information
to the user interface or to an application. Information such as signal strength cannot be monitored.
The WWAN driver tells a suitable modem to switch to multiplexing mode. This creates several virtual serial
ports on the single physical serial port. The PPP connection is on one of the virtual ports. AT modem
commands and status data can be sent through another virtual port.
19.4.2 Virtual Serial Port
The Mobile Devices SDK makes a virtual serial port available. The virtual serial port is hard-coded to COM8:
on all Psion computers. It behaves like any other COM port. As soon as the WWAN modem is initialized, the
WWAN driver publishes a COM port interface.
Ikôn (7505) • Windows Mobile 6.0 Professional
• Windows Mobile 6.1 Professional
Omnii XT15 (7545XA) • Windows Embedded Hand-Held 6.5
Omnii RT15 (7545XC) • Windows Embedded Hand-Held 6.5
EP10 (7515) Windows Embedded Hand-Held 6.5
Computer Operating System
Computer Modems Supported
7535 Asus AGC-100
1
; Enfora ADT0110
1
7535 G2 Asus AGC-100
1
; Enfora ADT0110
1
Workabout Pro (7525) CMCS NTN-000
1
; Novatel U630
1
; Cinterion MC75i
Workabout Pro G1 (7525) Sierra Wireless AC550
1
, AC555
1
, AC850
1
, AC860
1
; Enfora GSM0110
1
; Siemens
MC75
1
; Cinterion MC75i
Workabout Pro G2 (7527) Enfora GSM0110
1
; Siemens MC75
1
, HC25, HC28; Cinterion MC75i
Workabout Pro 3 (7527) Enfora GSM0110
1
; Siemens MC75
1
, HC25, HC28; Cinterion MC75i
Ikôn (7505) Siemens HC25, HC28, MC75
1
Omnii XT15 (7545XA) Cinterion MC75i; Cinterion PH8-P
Omnii RT15 (7545XC) Cinterion MC75i; Cinterion PH8-P
EP10 (7515) Cinterion PH8; Sierra Wireless MC5728V
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