T68i
White Paper, April 2002
22
viewed on the WAP browser of the T68i. An
XHTML page canbe viewed in both the WAP
browserand in any standard Web browser.
Improveproductivity
A businesscan use a WAP gateway to provide a
secureconnection to its corporate network,
improvinginter nal 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
betweencorporate services and WAP services on
the Internet,simply by switching WAP profile.
The T68i has dynamic WAP profile handling,
which meansthat the user can add, edit and
delete WAP profiles. The T68i has a maximum of
5WAPprofiles.
During WAPbrowsing, the options button on the
T68i givesthe user immediate access to a
dynamicoption menu for WAP services, similar to
a mouse right-clickin PC programs.
Bearer type characteristics
The T68i accesses WAP services over IP. IP can
be providedeither over GSM Data or GPRS,
dependingon network services.
Typicaldifferences which distinguish the bearer
types are listed below.

GPRS access

• Theconnection is maintained “constantly”,
with data transmitted in packets, and
transmissioncapacity being used by the
applicationin use on an as-needed basis.
• Higher transmission speed than with GSM
Data or SMS access.
• Pricing ofGPRS can be dependent on the
actual useof bandwidth, which means the
user is chargedfor the volume of data
transmitted,rather than the duration of the
connection.
• When transmitting large amounts of data,
bandwidthcan be increased automatically
to allow fastertransmission speed.
• Ideal for complex pull services, browsing,
data transfer,provisioning, pager services,
messagingservices, info services, push ini-
tiations.

GSM data access

• Circuit connection of data calls, which
means that the phone is connected during
theentireWAPsession.
• Higher transmissionspeed than with SMS
access.
• Pricingis comparableto that of data calls
in the network.
• Suitable for complex pull services, b rows-
ing anddata transfer.
• Not suitablefor provisioning, pager ser-
vices.
Gateway characteristics
AWAP Gateway provides Internet/intranet as well
as WAP services to the mobile browser. A
Gateway is identified by an IP number,depend ing
on accesstype.
End-to-end gateway navigation
The WAP 2.0 supports E2E (End-toEnd) Gateway
navigation,making it possible for example for a
bank to redirect its clients from the Internet
gateway to its own gateway.
Security using WAP
For certainWAP services, such as banking
services,a secure connection between the phone
and WAP gateway is necessary. An icon in the
displayof the T68i indicates when a secure
connection is in use.
TheT68iisbasedontheWAP2.0(WML1.3)
specificationsuite, in which security functionality
is specifiedby a technologycalled Wireless
TransportLayer Security (WTLS). The WAP
protocolsfor handling connection, transport and
security are structured in layers, with security
handled by the WTLS layer,oper ating above the
transportprotocol layer. WTLS classes define the
levelsof 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.
Serverauthentication requires a server certificate
storedattheserversideandatrustedcertificate
storedat the client side.
Client authenticationrequires a client certificate