Ericsson T20E Quick reference guide

Mobile Phone
T20e
White Paper
EN/LZT 108 4803 R1A

Ericsson is the lea ing provi er in the new telecoms worl , with communications solutions that com-
bine telecom an atacom technologies with free om of mobility for the user. With more than 100,000
employees in 140 countries, Ericsson simplifies communications for its customers - network operators,
service provi ers, enterprises an consumers - the worl over.
First e ition (March 2001)
Publication number: EN/LZT 108 4803 R1A
This ocument is publishe by Ericsson Mobile Communications AB , without any warranty.
Improvements an changes to this text necessitate by typographical errors, inaccuracies of current information
or improvements to programs an /or equipment, may be ma e by Ericsson Mobile Communications AB at any
time an without notice. Such changes will, however, be incorporate into new e itions of this ocument. Any
har copies of this ocument or any locally store copies of this ocuments are to be regar e as temporary refer-
ence copies only.
All rights reserve .
© Ericsson Mobile Communications AB, 2001

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Contents
PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Purpose Of This Document . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . 6
WAP SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Using WAP In The T20e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Bearer Type Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Gateway Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connection-oriented And Connection-less WAP . . . . . . . . . . 9
Security Using WAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Over-The-Air Provisioning Of WAP Settings. . . . . . . . . . . . 10
Configuration Of WAP Settings . . . . . . . . . . . . . . . . . . . . . . 10
POWERFUL MESSAGING AND CHAT . . . . . . . . 11
Enhanced Messaging Service (EMS) . . . . . . . . . . . . . . . . . . 11
Mobile Chat Via SMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CONNECTIVITY . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Infrared Modem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cable Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
FUNCTIONS AND FEATURES . . . . . . . . . . . . . . 15
In-phone Functions And Features . . . . . . . . . . . . . . . . . . . . . 15
Network-Dependent Features . . . . . . . . . . . . . . . . . . . . . . . . 17
SIM APPLICATION TOOLKIT . . . . . . . . . . . . . . . 18
TERMINOLOGY AND ABBREVIATIONS . . . . . . 22
RELATED INFORMATION . . . . . . . . . . . . . . . . . . 25
APPENDIX: TECHNICAL SPECIFICATIONS . . . 26

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The Ericsson T20e White Paper is esigne to give the rea er a eeper technical un erstan ing
of how the T20e is esigne , an of how it interacts with other me ia. This ocument will make
it easier to integrate the T20e with the IT an communications solutions of a company or orga-
nization.
People who can benefit from this ocument inclu e:
• Corporate buyers
• IT Professionals
• Software evelopers
• Support engineers
• Business ecision-makers
The best place to fin all the extras you nee to support your phone an aily life is at the Eric-
sson Mobile Internet, http://mobileinternet.ericsson.com. Here you will fin ownloa able ring
tones, games, news, information, an a host of exciting links to other sites.
More information, useful for pro uct, service an application evelopers, is publishe on the
Ericsson Mobility World. The site at http://www.ericsson.com/mobilityworld contains up-
to- ate information about technologies, pro ucts an tools.
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The T20e is a Dual Ban phone with a lithium battery; a phone of mo ern esign an a vance
technology.
• It has a Wireless Application Protocol 1.1 (WAP 1.1) compliant browser, allowing fast an
reliable access to Internet services with security accor ing to WTLS class 2. Both access
types, GSM Data an SMS, are supporte .
• The T20e supports Enhance Messaging Service (EMS), an enhancement of the SMS stan-
ar . This makes it possible to inclu e pictures an melo ies in messages, an also to
receive an e it new pictures an melo ies on the phone.
• Mobile chat over SMS provi es Internet-style chat functionality.
• With the built-in Picture E itor an Melo y Composer, users can create an e iting their
own pictures an melo ies on the phone.
• Support for Swatch® Internet Time, a new global time concept, without time zones.
• It supports SIM Application Toolkit (Online Services), which makes it possible for operators
to provi e new services to existing users over the air, inclu ing new menus an functions in
the phone.
• Profiles feature; groups of settings preset to suit certain environments, such as ”In Car”,
”Meeting”, ”Home”.
• A full graphic isplay with an easy to navigate, user interface software.
• Numbere shortcuts make it possible to prepare settings into a favourite menu which the
user can access quickly an easily.
• The Mobile Office DI 28 infrare mo em (optional accessory) turns the T20e into a wireless
mo em for ata communication, Internet connection an fax from the user’s PC or PDA.
• The RS-232 cable DRS-10 (optional accessory) can be use for connecting the T20e to a
PC.
• A wi e range of accessories compatible with the T20e are available from your local Erics-
son sales representative.

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The typical WAP client is a small, portable evice which is connecte to a wireless network.
This inclu es mobile phones, pagers, smart phones, PDAs an other small evices. In these
evices, you have a limite user interface, low memory an computing power compare to
esktop an laptop computers. The WAP browser in the T20e is compliant with WAP 1.1
inclu ing security accor ing to WTLS class 2. It is esigne for WML an cannot rea or inary
HTML pages, but it is suitable for interaction with customer services, e. g. ticket reservation. It
is also han y when you want to access text-base information, such as timetables, share prices
an exchange rates an Internet banking an other interactive services.
The built-in WAP browser gives the user portable, fast an secure access to a wi e variety of
services, with the possibility of personalize services. WAP in the T20e offers new opportuni-
ties to companies an service provi ers:
Bearer types The T20e accesses WAP over a stan ar GSM Data connection as well as
over SMS. (Network- epen ent services.)
Connection-oriente Connection-less or connection-oriente WAP can be selecte by the user.
Connection-oriente WAP provi es browsing with a high reliability.
Ban wi th efficiency One of the key a vantages WAP has over text-base HTML pages on
mobile evices, is the ban wi th efficiency for communication. This is
ue partly to the fact that the WAP application is communicate to the
wireless evices in the form of binary enco e ata.
Provi e settings Using SMS messages, configuration settings can be sent over the air,
OTA, so that the user oes not nee to configure the WAP access settings
manually.
Creating WAP services Creating a WAP service is no har er than creating an Intranet/Internet
service to ay since WML an WMLScript are base on well-known
Internet technology. New market segments can be a resse by launch-
ing innovative mobile Value A e Services.
Using stan ar tools It is possible for the service creator to use stan ar tools like ASP or CGI
to generate content ynamically. You can utilize existing investments in
atabases etc. that are the basis of existing Internet services. Create a ser-
vice once an make it accessible on a broa range of wireless networks.
Maintain customer base You can a apt existing Internet services to WAP. The actual binary
enco ing can be han le by the WAP Gateway which makes it possible
to create WAP applications using the text-base language WML an
other tools. In fact, existing HTML-base applications on the Internet can
be viewe in the WAP browser, if an automatic conversion is performe
in the WAP Gateway.
Improve pro uctivity Improve an simplify the communication flow within an organization by
making information available to mobile users. A company or organiza-
tion can use a WAP gateway to provi e a secure connection to the com-
pany network for their users.
The WAP profiles The T20e hol s several WAP profiles, each with a group of network set-
tings an a home page. If you provi e a corporate WAP service on your
Intranet, it is useful to enter an Intranet WAP profile in user phones. The
WAP profile hol s network settings an user i entification. The users
switch easily between the corporate services an WAP services on the
Internet, simply by switching WAP profile.
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The phone accesses WAP services over SMS or IP, where IP is provi e over GSM Data. Typi-
cal ifferences which istinguish the bearer types are liste below this iagram.
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• Circuit connection of ata call means that the phone is connecte uring the WAP session.
• Connection-oriente WAP (user option) uses error recovery services to provi e high reliabil-
ity.
• Comparably higher transmission spee than with SMS access.
• Pricing of GSM Data access can be compare to pricing of ata calls in the network.
• GSM Data is suitable for Complex Pull services, Browsing an Data transfer.
• GSM Data is not suitable for Provisioning, Pager service.
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• SMS point-to-point is use an not SMS Cell Broa cast.
• The connection is maintaine by the automatic exchange of ”messages” between the phone
an the SMS Service Center.
• Comparably lower transmission spee than with GSM Data access.
• Pricing of SMS access can be compare to pricing of the normal SMS in the network.
• SMS is suitable for Messaging services, Info services, Provisioning.
• SMS is not suitable for Browsing or Data transfer.
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The WAP Gateway provi es services in the company’s Intranet, a banking or stock tra ing ser-
vice on the Internet, or access to other WAP applications on web a resses anywhere on the
Internet. A Gateway is i entifie by an IP number or by a phone number, epen ing on access
type.
The T20e supports both connection-less an connection-oriente WAP over GSM Data. The
user can select which metho to use. In general, connection-oriente means that the connection
between the WAP browser in the phone an the WAP Gateway is maintaine in a session with
error recovery services. This gives a high reliability with a re uce risk of errors in the transmis-
sion, an improves efficiency in WAP browsing.
The T20e is base on the WAP 1.1 specifications where security functionality is specifie with a
technology calle Wireless Transport Layer Security (WTLS).
The WAP protocols that han le the connection, its transport an its security are structure in
protocol layers. The security is han le by the WTLS layer operating above the transport proto-
col layer. The WTLS layer is mo ular an there are WTLS classes that in icate which security
level is supporte by the application.
• WTLS class 1 specifies an enco ing of the information.
• WTLS class 2 inclu es class 1 an in a ition a server authentication, where server certifi-
cates are nee e in the phone (access lock).
• WTLS class 3 inclu es class 2 an in a ition a client certification, where client certificates
are nee e for the user (signature lock).
The T20e supports WTLS class 2, an it is equippe with a number of certificates. An access
lock is nee e when accessing certain WAP sites. The user is aske to enter it before a secure
WAP connection is establishe .
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To simplify configuring WAP settings in a number of phones, all settings can be sent as an SMS
message to each phone. This makes it easy for an operator, a service provi er or a company to
istribute settings for Internet/Intranet, an WAP, without having to configure each phone man-
ually. This also makes it easy to upgra e the services provi e to the users, without the nee for
users to perform any manual configuration.
• The OTA configuration message is istribute via SMS point-to-point
• The setup information is a binary enco e XML message, accor ing to WBXML. To
receive information about OTA specifications, please contact your local Ericsson representa-
tive for consumer pro ucts. A configurator that utilizes OTA provisioning can be teste on
the Ericsson Mobile Internet
• The user is not alerte about new settings until the ongoing browsing session en s. Further-
more, settings are not change uring an ongoing browsing session
• The necessary user interaction is limite to receiving an accepting/rejecting the configura-
tion message, an selecting which WAP profile to allocate the settings to
• Security can be han le using a keywor i entifier isplaye on the screen as a share secret
between the SMS sen er an the receiver. It is important that the user has a way to verify
that the configuration message is authentic
To perform the WAP configuration of a single phone it is suggeste to use the step-by-step WAP
configurator provi e on the Ericsson Mobile Internet. The configurator utilizes OTA provi-
sioning, an it is available on http://mobileinternet.ericsson.com, no login require . The WAP
settings can also be customize by the operator.
A manual configuration is ma e using the menu system in the phone. This is escribe in the
User’s Gui e.
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