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Bearer characteristics
The phone accesses WAP services over IP, where
IP is provided over GSM Data.
GSM data access
•
Circuit connection of data calls mean that the
phone is connected during the WAP session.
•
Connection-oriented WAP uses error recovery
services to provide high reliability.
•
Higher transmission speed than with SMS
access.
•
Pricing of GSM data access comparable to
that of data calls in the network.
•
Suitable for Complex Pull services, Browsing
and Data transfer.
•
Not suitable for Provisioning, Pager service.
•
Connectionless WAP can also be used for
those networks that do not support connec-
tion-oriented WAP.
Connection-orientated WAP
The T600/T602 supports connection-oriented
WAP over GSM Data. In general, this means that
the connection between the WAP browser in the
phone and the WAP Gateway is maintained in a
session with error recovery services. This gives a
high reliability with a reduced risk of errors in the
transmission, and improves efficiency in WAP
browsing.
White Paper, September 2002
Security using WAP
The T600/T602 is based on the WAP 1.2.1 specifi-
cations where security functionality is specified
with a technology called Wireless Transport Layer
Security (WTLS).
The WAP protocols that handle the connection, its
transport and its security are structured in proto-
col layers. The security is handled by the WTLS
layer operating above the transport protocol layer.
The WTLS layer is modular and there are WTLS
classes that indicate which security level is sup-
ported by the application.
•
WTLS class 1 specifies an encoding of the
information.
•
WTLS class 2 includes class 1 and in addition
a server authentication, where server certifi-
cates are needed in the phone (access lock)
The T600/T602 supports WTLS class 2.
T600/T602
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