viewed on the WAP browser of the T68i. An XHTML page can be viewed in both the WAP browser and in any standard Web browser.
Improve productivity
A business can use a WAP gateway to provide a secure connection to its corporate network, improving internal communication flow by making information available to mobile as well as office users.
The WAP profiles
A WAP profile holds network settings and user identification, allowing the user to switch easily between corporate services and WAP services on the Internet, simply by switching WAP profile.
The T68i has dynamic WAP profile handling, which means that the user can add, edit and delete WAP profiles. The T68i has a maximum of 5 WAP profiles.
During WAP browsing, the options button on the T68i gives the user immediate access to a dynamic option menu for WAP services, similar to a mouse
Bearer type characteristics
The T68i accesses WAP services over IP. IP can be provided either over GSM Data or GPRS, depending on network services.
Typical differences which distinguish the bearer types are listed below.
GPRS access
•The connection is maintained “constantly”, with data transmitted in packets, and transmission capacity being used by the application in use on an
•Higher transmission speed than with GSM Data or SMS access.
•Pricing of GPRS can be dependent on the actual use of bandwidth, which means the user is charged for the volume of data transmitted, rather than the duration of the connection.
•When transmitting large amounts of data, bandwidth can be increased automatically to allow faster transmission speed.
•Ideal for complex pull services, browsing, data transfer, provisioning, pager services, messaging services, info services, push ini-
T68i
White Paper, April 2002
tiations.
GSM data access
•Circuit connection of data calls, which means that the phone is connected during the entire WAP session.
•Higher transmission speed than with SMS access.
•Pricing is comparable to that of data calls in the network.
•Suitable for complex pull services, brows- ing and data transfer.
•Not suitable for provisioning, pager ser- vices.
Gateway characteristics
A WAP Gateway provides Internet/intranet as well as WAP services to the mobile browser. A Gateway is identified by an IP number, depending on access type.
End-to-end gateway navigation
The WAP 2.0 supports E2E
Security using WAP
For certain WAP services, such as banking services, a secure connection between the phone and WAP gateway is necessary. An icon in the display of the T68i indicates when a secure connection is in use.
The T68i is based on the WAP 2.0 (WML 1.3) specification suite, in which security functionality is specified by a technology called Wireless Transport Layer Security (WTLS). The WAP protocols for handling connection, transport and security are structured in layers, with security handled by the WTLS layer, operating above the transport protocol layer. WTLS classes define the levels of security for a WTLS connection:
•WTLS class 1 – encryption with no authen- tication.
•WTLS class 2 – encryption with server authentication.
•WTLS class 3 – encryption with both server and client authentication.
Server authentication requires a server certificate stored at the server side and a trusted certificate stored at the client side.
Client authentication requires a client certificate
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