SMA Technologie AG Higher added value through ecological

SMA Technologie AG Higher added value through ecological

VERSION
1/08
SMA success
story:
Inverters for
photovoltaic
SMA management (left to right):
Pierre-Pascal Urbon, Günther Cramer,
Reiner Wettlaufer, Peter Drews
TDT-ProduCTS
New C1500 mobile
Router Series
TDT A1500
Telephone system
SW1500
Video surveillance
system
Info terminal
DynTDT
Trust TDTPublic key
infrastructure
TDT in India
Promising contacts
with Indian companies
Everything about
Voice over IP
The page 3
Editorial
Network management
with TDT
SMA Technologie AG
Higher added value through ecological innovations
The creative use of new technologies portrays the best of the environmental market. This is especially so
for solar technology and exactly fits
SMA based in Cassel. Three former
students from the University of Cassel launched the company SMA in
1981 and laid the corner stone for
a German success story. Not only
that products for solar technology,
communication and control and railway technology were manufactured
in Germany – more than 200 desi-
gners and engineers are continually
working on the research and optimisation of new technologies, amongst others bringing outstanding photo-voltaic inverter products to the
market. This has made the company
into one of the leading manufacturers of inverters in Europe and North
America. To guarantee the transmission of information to and from solar
installations from every location and
every place, SMA relies upon robust
routers from TDT.
SMA was building inverters before others had
even thought about it. During the times before
promotional programmes, the founders and current board members were convinced that solar
power had a long-term future as an energy source. At the start of the promotional programme
1.000 roof and 100.000 roof programmes,
SMA shone with qualitative, well-engineered
products and could thereby serve the German
market.
Continued expansion of the core competencies
- microprocessor techniques, digital communications technology, power electronics as well as
closed loop and system technologies – such a
high level of systematic development and networking could not have taken place in any other
country than Germany.
This clear commitment to the
German location, also for the production facility, is apparent at the
company’s site at Niestetal near
Cassel. Additional modern production facilities will be erected
on the SMA site to cope with the
demand for SMA’s sought-after
products. To this end the SMA representative Joerg Lengemann (product management) stated, “The
high quality, which we require can
only be built here. Only when the
hard and software development
teams work closely together with
the production, can our technological advantage and therefore the
German manufacturing base can
be secured and expanded.” The
employees are proud of their special corporate
structure, which is promoted and practiced at all
levels. A nurtured contact with the local universities and institutions paves the way to SMA for
young qualified people. The company willingly
provides resources for vocational training purposes, diploma projects and internships.
detached house that can deliver up to 6kW into
the mains. The next group, such as barn roofs
or industrial areas produce up to 100 to 200 kW
power. The third group are the open space systems, installed on green field sites (large-scale
systems), which go to the megawatt range and
even reach peak outputs of up to 40MW. It’s
important to understand that the direct current
solar modules do not supply the public mains
network, but rather the connected inverter converts the solar energy into mains network compliant power. If no public network is available,
as is the case in remote areas and developing
countries, then an island solution can be created
in the form of a modularly expandable mains
network. Also here SMA supplies the necessary
system technology and is involved in a number
The inverter and photovoltaic equipment: the
solar sector is very diverse, beginning with a
of development aid projects.
The business model for the inverters is dependant on the size of the system. SMA delivers the
small and medium systems to wholesale dealers who assemble and sell complete plant and
equipment. As a rule the systems are purchased
and installed by electricians who also arrange
the connection to the public mains network.
The SMA inverters belong to the top of the range
equipment on the world market. With physical
(electrical) efficiencies of 98% the possibility of
increasing the effectiveness is nearly exhausted.
But, because nothing is so good that it cannot
be improved, the customer-oriented development work with high commitment continues.
Additional efficiency is provided by the broad
inverter product range, in order to optimally use
the potential of the different solar modules in
the solar equipment for the increasing system
voltages.
A further advantage of the SMA technology
is the simple connection during installation along the lines: plug-in - switch on. The new
Inverter generation does not transmit data to
the data logger via cable, rather by radio using
Bluetooth technology. The complete cable installation to the data logger can be
omitted. Because the inverters are for
worldwide use, the network compatibility of the mains must be considered during development of the equipment. This
is normally achieved by software means.
The setting is made using a rotary switch
on the inverter. This service is really appreciated, especially by the meanwhile
internationally active wholesale dealers.
For large systems as for example the energy park Waldpolenz near Leipzig, the
investors respectively companies specialise in turn key systems – and rely for
their core components, the inverters, on
the expertise of SMA. The solar generators include the SMA central inverters,
which feed the current into the public network.
Additionally, each inverter is equipped with
a data connection that transmits operational
data, error messages and fault data to an industrial PC-based data logger. Dependent on
the configuration, the unit collects for example voltage and current values for the inverter
or from the complete plant, enabling revenue
analysis and statistical interpretations. Hence,
using the log data it is possible to determine
whether the collected information lies inside determined limits and therefore within the predicted revenues respectively
the predicted efficiency.
The inverter
The unit decides with which efficiency the solar modules energy
will be converted, how much energy is feed via a separate electricity meter into the public mains network and what the resulting
revenue will be. The intelligent monitoring techniques make sure
that an alarm is sent to
the operator when the
module
performance
(efficiency) deceases or
a fault occurs, thereby
reducing as far as possible the loss of revenue
using selective repair
procedures. To safeguard the efficiency of
the photovoltaic plant a
regular comparison of
the individual physically
identical strings of solar
cells is necessary, to determine an eventual reduction in performance
of individual cells. Integrated alarm and statistical functions enable the
continuous control, displays a realistic picture
of the plant status, hence
making targeted service
possible.
The data flow
The collected information from the data logger (Sunny WebBox) is sent to the SMA Internet portal using XML upload for
visualisation. The web browser implemented in the Sunny WebBox presents the possibility of remote access. The customers,
dependent on their configuration, can either dial the Sunny portal in Niestetal or direct on the plant, to acquaint themselves
with the status respectively the generated energy. The visualisation displays offer for example comprehensive information
about daily or periodic revenues.
To guarantee the highest quality demands, the programming of
the portal application (Sunny Portal) as well as the data logger
firmware is exclusively based on internal SMA expertise.
The WebBox offers various possibilities to transfer data. Apart
from the built-in GSM modem it is primarily the Ethernet interface, which is used to connect to the Internet. The TDT router assumes the task of data transmission for large plants with
central inverters (Sunny Central) or when applicable, to safely
transmit data from a number of data loggers with a large number
of connected inverters to the Internet portal. The Sunny Central
inverter is installed in one or a number of electrical cabinets,
which can be mounted concrete substations, which can be as
large as a garage. They also house further auxiliary equipment
for data transmission within the solar plant. Via copper or fibre
optic cables, information is passed from the data logger to the
TDT router, which forms the interface to the outside world. According to the data structure of the location, the TDT equipment
transmits the collected data over the web via ISDN, DSL, GSM
or GPRS either to SMA computer centre or the customer.
Because some larger plants are in operation for 30 years, the
routers must also fulfil special criteria. The equipment must be
durable, also providing stable operation even in extreme temperatures, reliable transmission and meet the industrial standards.
During the first test phase in 2005 the routers that SMA used
did not reach the required degree of performance and during the
search for an alternative, came upon the professional equipment
from TDT. The trials with the ISDN router convinced SMA.
Among others a crucial factor for using the TDT router was the
faultless operation even when subjected to a strong electromagnetic environment. The cooperation for the test series began in
2006 using GSM, DSL and GPRS routers from TDT. GPRS is
important for solar power plants, which are exclusively reached
via this network.
All TDT routers are characterised by their security-oriented de-
sign, achieved amongst others by a powerful firewall as well
as detailed monitoring, accounting and content filter functions.
Elaborate backup solutions adapted to the router version guarantee maximum availability.
TDT router, the all rounder
Using bi-directional communication via the TDT router, it is also
easy to perform software updates
remotely. Thereby all major network topologies and transmission procedures are considered,
to meet the requirements for
plant availability and customers
worldwide.
Cooperation
The successful cooperation requires detailed preparatory work
on both sides. For example the
determination of the basic configuration for the router, which
was compiled in the SMA test
laboratory with assistance from
the TDT technicians. Since the
successful conclusion of the
tests, TDT delivers the routers with SMA specific configuration.
Hence, the SMA specialists must only define plant specific data
for example the IP address or ISDN phone number for a particular router series.
To impart the corresponding know-how about the TDT router
series, the support technician Andreas Landinger gave the SMA
technicians an intensive seminar elucidating the router philosophy and explaining the handling and configuration possibilities.
In the meantime more than a dozen SMA employees are involved in the individual projects.
Due to the continuing trend for even larger photovoltaic plants
the necessity for professional communications, especially in
international business, has also increased. This is a clear orientation and core philosophy of the company. More than 1,900
motivated and qualified employees ensure that the Niestetal
location remains the linchpin for innovative solar technology
including research, development and production. The company TDT, their partner for data communication is following the
same objectives. The proverbial reliability and the convincing
TDT support is very obliging for SMA Technologie AG, therefore a long-term cooperation with recurring new challenges is
welcomed from both sides.
Contact: Jörg Lengemann
Product Management & Sales
Sales Engineer
Phone +49 561 9522-114
[email protected]
www.SMA.de
Editorial
Network management – no
problem?
The IT world is talking about
the meaning of network management. Only a few of them
however know what it really
means. To install a network
management system with the
help of a wizard is not difficult. For many it is sufficient to
graphically monitor a device
in a network management
system. For the most, this limited to gathering simple vital
signs. If the answer from a device is missing an alarm is generated. So far so good – but when a device doesn’t answer
anymore then in most cases it’s too late!
What about creeping faults, bottlenecks, faulty lines? How
can I check the service level agreements of my provider?
When commencing my activities with TDT’s expert support
I adopted the proprietary network management system from
TDT’s NetMACS. Close customer contact, scores of test
configurations, installations and tearing my hair out brought
me experience in network management. I now know what
customers really expect from a network management system. Simple operation! With the new router generations, the
X.25-burdened NetMACS must find an equivalent alternative on the IP level. The result of research, tests, price comparisons, load tests and the like were that the SNMP network
management system LoriotPro from our partner company
in France was taken into our portfolio. As previously explained, the operation and configuration should be simple.
At the same time, it should also be rich in functionality and
extendable without limits?! They don’t go together! Even
through graphic visualisation, simple menu assistance, fantastic online manuals, newsgroups and the like cannot spare
an administrator a certain level of know-how. Network management begins with the hardware selection and ends with
the backup of data and emergency recovery. Besides this an
administrator must master of IP, routing and SNMP, on top
of that to understand the MIB structure and to configure the
devices accordingly.
I have understood the problem: which is not readily possible
even in large companies. A service must be offered covering
all the previously described aspects. Consequently the “enhanced service” from TDT has been created. To achieve this
the complete network management is hosted and maintained
by TDT on a dedicated server. Commissioning, configuration and maintenance are no longer applicable for the customer. In a customer discussion, the objects and parameters to
be monitored are defined and which of them can be adapted
for dynamic runtime. Alarms are accumulated by TDT and
are handled in the expert service centre – often before the
customer has even realised that a problem exists.
Even in powerful network management systems, there are
unfortunately weaknesses in the configuration and security
management. I’ve made it my job to identify and correct these deficiencies. The TDT task manager is databank supported
proprietary development, which is able to process time-controlled tasks for an unlimited number of TDT devices from
the R-series. Amongst others this includes software updates,
configuration up and downloads or the execution of pre-defined commands.
In the new “certificate administration” service add-on, TDT
integrates them in the companies own certificate hierarchy.
The distribution and renewal of the certificates for TDT’s IPSec-enabled devices is achieved using the widely used SCEP
(Simple Certificate Enrolment Protocol) protocol. With this
portfolio in the sphere of service, TDT is ready for even
more ambitious tasks. The term “all-round carefree package”
has been redefined by TDT whereby we want to set future
benchmarks by further developing our proprietary software
and service offering with respect to our customers.
Your
Josef Zehentbauer
IMPRESSUM
Publisher
TDT
Michael Pickhardt
chief executive officer
Siemensstraße 18
84051 Essenbach
Tel. +49 8703 929-0
Fax +49 8703 929-20
E-Mail: [email protected]
web. http://www.tdt.de
Responsible for the
content:
H. J. Büttner
marketing director
Prints: 15.000
Production:
MCW
Ulmenstraße 21
84051 Essenbach
Tel. +49 8703-91360
[email protected]
VoIP: Telephony via a Network
Most frequently used Codecs:
Voice over IP (VoIP) understood as telephoning over a computer
network using Internet protocol (IP). The different VoIP
standards enable the real-time transmission of conversations
over IP-based networks.
IP-Netz
Differences Between VoIP and Conventional
Telephony
VoIP is a communication solution based on the Internet
protocol (IP). This means that the conversation data is packed
in packets, which are individually transmitted, to the recipient.
The path, which the data packets take in the network, cannot be
influenced. Furthermore, payload data is also transmitted on the
network; therefore a continuous transmission is only possible
with restrictions. A prioritisation of the audio data compared to
the payload data is for example possible when using a quality
of service (QoS). With conventional telephony the speech is
converted to an electrical voltage using a microphone, this
is passed via a switching station to the recipient (diagram 2).
After lifting the receiver, the voltage is immediately passed to
the earpiece, which converts it to an audible.
IP-Netz
Gateway
Telefon-Netz
VoIP from/to a Classical Telephone
Gateways are required to enable connections to conventional
telephone networks. The gateways are connected with the IP
network of the VoIP telephone as well as the conventional
telephone network. When they receive a request from an IP
telephone it is forwarded to the telephone network by calling
the desired number. If they receive a request from a telephone
network they forward it to the corresponding IP telephone.
Gateways can be either locally employed VoIP telephone
systems or external, mostly chargeable servers. The VoIP
telephone periodically contacts the gateway and transfers the
currently valid IP address to the server. Thereby a correlation
between the telephone number and the IP address is ensured,
also with changing IP address
G.711a 80 KBit/s G.726 G.728 G.729 iLBC 80 KBit/s Excellent (better than ISDN)
55 KBit/s Good
32 KBit/s 32 KBit/s 32 KBit/s G.723.1 21 KBit/s ENUM
ENUM stands for “telephone number mapping” and is an
application of the domain name system to transform telephone
numbers into Internet addresses.
The idea
Because the availability of VoIP services has risen sharply in
the past years and users want to be reached either by VoIP or on
conventional telephone connections using the same telephone
number, it was decide to generate a number plan similar to that
in classical telephone networks. This was built on the classical
top-level domain arap. Because the mapping is based on the
E.164 number plan, e164 was chosen as sub domain. The listed
telephone numbers are simple DNS entries, whereby it would
be possible for everyone to generate an individual number plan
under other domains.
1. Write the complete E.164 number
VoIP to VoIP: the general functionality of voice over IP is
described in diagram 3. As with the classical telephony the
speech is recorded as an analogue signal using a microphone.
This is converted into a data stream using an analogue/digital
converter and subsequently compressed. The compressed data
stream is then dissected into IP packets and sent to the recipient
via the network. By the recipient the packets are consolidated
back into a data stream and using an analogue/digital converter
transformed into an analogue signal which is passed to a
loudspeaker.
Bandbreite Speech quality
G.722 Telefon-Netz
The implementation
Functionality
Codec 2. Remove all characters that do not represent a digit
3. Insert full stops between the digits
4. Reverse the order of the digits
5. Append the ENUM domain suffix .e164.arpa
+49 8703 929 00
49870392900
4.9.8.7.0.3.9.2.9.0.0
0.0.9.2.9.3.0.7.8.9.4
G.723
GSM 15 KBit/s
13 KBit/s Excellent (better than ISDN))
Good
Good
Good
Sufficient
Sufficient
Sufficient (Mobile telephony)
VoIP Terminal Devices
Basically there are three types of terminal
devices, which can be used for IP telephony.
VoIP Softphones
With softphones a software is specified with
which it is possible to use VoIP on a PC.
Apart from the open standards H.323 and
SIP there are also proprietary protocols
such as Skype, which are in widespread
use.
IP-Telefony
IP telephones are telephones
with a network connection or
classic telephones which are
connected to a network using an
adapter.
IP Telephone System
An IP telephone system or VoIP telephone system replaces classic
telephone systems and offer the same convenient characteristics,
including for example conference switching, forwarding, call
transfer and free of charge internal calls. Calls from and within
the analogue/ISDN network can be optionally made via a gateway
or via the analogue/ISDN hardware
0.0.9.2.9.3.0.7.8.9.4.e164.arpa
The Request
The connection to a telephone number, which has an ENUM
domain, is attempted via an ENUM look-up terminal or via
a provider, which supports ENUM look-up. In this way the
internal terminal respectively the provider request the target
using the ENUM domain. If under the target for example a
VoIP-target a mobile or fixed subscriber number available,
then a connection build-up will be preferred to this connection.
Thereby several targets can be stored and called according to
their priority. To register a German telephone number for an
ENUM domain it must correspond to the German telephone
number plan. The registration is made via a registration office.
Advantages
of VoIP
032 Telephone Number Range
An additional advantage of VoIP is its high mobility. A VoIP
connection is not fixed to one location and can be used worldwide.
An employee is available under his number at all times irrespective
of his workplace location. The only prerequisite is the availability
of Internet at the location
The pre-selection 032 is a telephone number range appointed
by the German federal network agency for VoIP. Because no
specific geographical location is associated to the 032 preselection it is predestined for use in different locations
Codecs and Bandwidth
The quality and necessary bandwidth of a VoIP connection is
determined in the most part by the audio codecs used, which
compresses the digital audio signal to a larger or smaller degree.
A high compression rate has a lower speech quality, however as
a result has a lower bandwidth. A
large number of audio codecs are
available, which cover the various
requirements for speech quality
and useable bandwidth. However
it should be considered that VoIP
terminal devices only support a
limited number of codecs and that
for the realisation of a connection
with a particular codecs all the
terminal devices involved must
be in possession of the relevant
codecs. The most frequently
used codecs G.711a requires pro
VoIP connection a net bandwidth
of about 80 Kbit/s including
overhead.
Cost saving
By using VoIP a common
network infrastructure
can be used for both speech and data transmission, the normal
telephone infrastructure is no longer required. Telephone
conversations with employees, branch offices and other VoIP
subscribers worldwide are free of charge..
Flexiblity
Added Value
According to the soft and hardware used VoIP offers a
multiplicity of value-added services:
- Computer Telephony Integration (CTI) e.g. number dialling
from Outlook, voicemails
- Least Cost Routing, always using the most favourable price
- Video telephony
- Higher scalability
- Conference calls
- Copying calls
- Calls can be copied and archivedn
Sources
Jochen Nölle; Voice over IP; 2. Auflage 2005;
ISBN 3-8007-2850-8
Dipl. Inf. (FH) Thomas Steffens; http://www.itk-steffens.de
http://de.wikipedia.org/wiki/Voip
TDT New Developments
The new C1500
mobile router series
The new generation of mobile 3G
routers is based
on a TDT’s own
Linux platform
offering flexibility and security.
The C1500 is equipped for every network:
GPRS, UMTS/HSDPA, CDMA!
For local access either WiFi IEEE 802.11
a/b/g with an additional 108 Mbit turbo modus, or an Ethernet port are available. By
utilising the complete IPSec suite all relevant security aspects are covered. A high performance firewall with intrusion detection,
scripting and the use of regulations complete
the integrated security package.
TDT A1500
The intelligent Telephone System
The TDT A1500 is a standalone telephone system based on Asteriks designed for small and
medium businesses (2 – 50 subscribers). TDT’s
own graphic interface enables convenient configuration and operation of the whole telephone
system. Additional to this a convenient switchboard is provided. Using the switchboard “Ingrid”, calls can be conveniently brokered from
every browser-supported workplace.
Key functions:
• Complete Asteriks server (SIP, IAX)
• Integrated router with firewall
• Switchboard “Ingrid“ for the simple admi nistration of calls
• Call centre functionality
• Forwarding of voicemail via E-Mail (wav)
Contact our sales personnel for a detailed
consultation.
Customer-oriented Competence: Expert Service
Our expert support team provides companies
with competent know-how in all aspects of
data communication. Agree with us about
your demands.:
Active Premium Service
Monitors your network 24/7. A dedicated server at TDT hosts the network management
system and is scaled for every customer network. Inquisitive? Give us a call!
Network Consulting
Based on our technical competence and awareness for efficiency and quality, TDT’s expert
support will consult you both by the selection
of equipment as well as with the planning of
your new company network.
Our expert support team will analyse your
network concerning costs and security. The
TDT expert service thereby completely fulfils
the requirements of medium-sized companies
at a favourable price.
TDT Expert Service Team
With immediate effect TDT is offering a CA,
that is to say a public key infrastructure. Thereby the TDT expert service is providing it’s
customers with a CA server to take care of it’s
created certificates. An actual RL for withdrawal of certificates will be taken care of by the
TDT expert service. Before expiry, the expert
service will renew certificates – fast, simple
and reliable.
The many diverse tasks of the PKI
• Issuing/signing of digital certificates
• Administration of certificates
• Renewal of certificates
• Operational restrictions of certificates
• Signing
• Encoding and decoding
• Authentication
• Data integrity
• Publishing of Certificate Revocation List
(CRL)
• Security measures for guaranteeing the
trustworthiness of the CA
Mobile G3 router on the
wish list of the Indian IT
sector.
The Indian market has undergone a rapid development and the government
is doing everything possible to promote this, because every new IT job provides three downstream jobs. After it’s
great sales successes in Thailand and
Indonesia TDT are now concentrating
to the Indian subcontinent. Sales manager Juergen Buettner and product
manager Wolfgang Rau have already
started a first venture in November 2007
in Bangalore, the India’s IT stronghold.
Together with the Bavarian Ministry
of Economics products were displayed
on a communal Bavarian booth at the
ExpoCom 2007 trade fair.
“Convergence” the largest telecommunications trade fair in March 2008 was TDTs
second trade fair in India. As predicted, the
mobile 3G routers enjoyed great interest. As
in Thailand they are the key to the connection
of ATMs (cash dispensing machines). These
high-tech routers can potentially replace costly satellite connections in India’s rural areas
and regions where the infrastructure is underdeveloped. Because safe and reliable data
communications, which TDT have introduced
in many companies, is stringent requirement
of the interested parties in India. Together with
the partner SLN Technologies Pvt. Ltd., TDT
is making its first contact, as an initial step to
establishing a longterm business relationship. The outcome
of the discussions
and the dynamic
development of the
Indian economy lead
us to anticipate a successful introduction
of TDT products and
a stable business.
SW1500
Info Terminal
SW1500
Autonomous Video
Monitoring
System
Braining and Seminars
Employees are the most important success
factor of companies. To ensure that this remains so, the TDT training and seminar program designs customised concepts to stimulate and extend the employee potential.
Trust TDT
TDT in India
Mobile G3 router on the wish list of the Indian IT sector
Key data of the TDT PKII
• Distribution of certificates via Internet
using an Online RA and SCEP
• Administration, signature, presentation of
certificates with a secure CA
• Protection of relevant files against failure
of the CA
• Only keys longer than 2048 bits
• Lifespan of client certificates limited to I
year
• Daily publishing and actualising of CRLs
in Intern
With the new
SW1500 TDT presents
a fully autonomous and mobile video monitoring system. The system is supplied using a
solar module and a high performance battery.
The integrated 3G router from TDT (GPRS/
EDGE/UMTS/HSDPA) guarantees a safe
“Always Online” connection. The intelligent
energy management and programmable timer functions guarantee safe operation. The
SW1500 can for example be employed for the
monitoring of building sites and ski slopes or
in the security sector.
NEW TDT LOGO
The logo includes elements
of the previous
company emblem and thereby
symbolises our growing know-how and continuity. At the same time it symbolises with
the new, open form of the letters the open
mindedness of TDT. The re-launch is also
evident on the TDT portal. Try it yourself at
www.tdt.de.
Andres Pichl new Salesman
From the numerous applicants the 24-yearold Andres Pichl emerged as winner. He is
very excited at the prospect of presenting
TDT products in the field.
Due to his know-how and
customer-oriented working
methods he will be assisting
the key account managers
Harald Boehm und Guenter
Wagner with their customer
consultations.
Product manager Wolfgang Rau in profitable discussions with the very
interested visitors to the fair
The newest development from TDT is a “standalone” info terminal for universal operation.
The terminal is equipped with an integrated
Internet browser with a virtual touchscreen
keyboard, card reader and all necessary communication interfaces. The Internet connection
is provided via DSL and/or by mobile phone,
whereby both methods can be used either as
the main or backup route. Communication is
provided with a configurable encryption and
authentication. Integrated into an elegant housing it’s ideal for shopping centres, DIY stores,
lottery agencies, etc. The TDT team can also
implement customer-specific requirements in
our renowned quality.
Additional application possibilities:
• Info point at museums, public buildings,
tourist offices
• Timetable information
• Booking terminal (train reservation,
flights, top-up mobile
phone cards)
• Guidance system e.g.
at trade fairs, expositions, DIY stores,
clinics
• Ticket dispensing,
in connection with a
printer and EC cash
• Product presentations
at trade fairs, expositions, in DIY stores,
car showrooms
• Photo processing
terminal for digital
photos, etc.
• Virtual reception e.g.
in hotels, Universities and schools
DynTDT
Behind the catchword
DynTDT, TDT offers its
service customers a free of charge DynDNS service. With this service we can reach your remote.