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P800 Smartphone
White Paper, May 2002
66
The required GPRS server resource is defined by an Access Point Name (APN) rather than a
telephone number. Example APNs might be
Corporation.operator.country Connect to your corporate intranet via a VPN
Internet.operator.country Connect to internet via the mobile operator’s ISP
Wap.operator.country Connect to the mobile operator’s WAP service
The Access Server in the GSM/GPRS network will make the connection to the requested
resource. Access control and security is performed using standard components such as Radius
servers.
Once connected, the user may simply leave the connection in place and access the remote
resources as and when required.
The diagram below shows the end-end connection route for a GPRS connection. The P800 and
PC ends are the same as before. The mobile operator is enabled to provide direct packet data
access to WAP and internet resources. By establishing a suitable Virtual Private Network (VPN)
connection to the corporate network, it is possible for the mobile user to access corporate intranet
facilities. Your mobile operator will be able to advise you on the available VPN options. Typical
methods are IPsec tunnelling over the internet, leased line and frame relay.
The P800 (A) is connected to the Internet Service Provider and may browse the web and check
mail. This connection is left open, enabling the mailserver to be polled periodically.
Using the P800 as a modem (B), it may be linked to a laptop PC using either infrared or
Bluetooth. A GPRS connection can be made to the corporate network enabling intranet and mail
services to be accessed.
The P800 may also be configures to access the corporate network directly using the built-in
Browser and Messaging applications.
A
B