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No. 10/2011 (March 7, 2011)
A difficult year for big cellular operators - more competition in the GSM market.
Since February, Ryanair company, which revolutionized the airline industry, and Maxroam mobile operator, launched a new formula of GSM services on the market.The main novelty is the elimination of roaming fees - the users do not pay for incoming calls and text messages in most European countries. Conversations across Europe cost 0.29 EUR per minute, data transmission 0.99 EUR per 1 MB. The users of this prepaid service may keep their phone numbers. The accounts are active for one year (365 days) from the last recharge.
The website offering this service shows that the user can save 1.8 EUR for a 10-minute call, both made and received (compared to Orange / O2 services).
As in the case of Ryanair air tickets, the distribution of the SIMs is conducted mainly through the Internet, as well as on airplanes, where each passenger is a potential customer. Ryanair carries approximately 78 million passengers per year.
In the case of home delivery of the SIM ordered online, for 5 EUR the customer gets 10 EUR credit for calls in Europe (the SIM and delivery are free). The new service may prove particularly attractive to businessmen, as well as for everyone traveling throughout Europe.
The operators in the U.S. and Japan have already begun 4G race.
Europe is still in the starting blocks.
Europe is still in the starting blocks.
In spite of the European Union regulations, roaming charges are a solid source of income for current mobile operators. The initiative of Ryanair and Maxroam may brutally deprive the operators of the income. The future seems to be very good for consumers, it is expected that large international operators will lower their prices soon.
This is not the only bad news for large operators. Telecommunications market analysts estimate that in 2011 customers will buy more smartphones than PCs. It means that voice calls will become a smaller and smaller percentage in relation to the transmission of other data required by the users of smartphones (movies, e-mails, websites), and will probably be offered for free to retain customers.
This trend and the need to invest huge amounts to build 4G networks (LTE), ultimately needed to support smartphones, means that the coming years will be a big test for the CFOs of telecommunications giants.
This is not the only bad news for large operators. Telecommunications market analysts estimate that in 2011 customers will buy more smartphones than PCs. It means that voice calls will become a smaller and smaller percentage in relation to the transmission of other data required by the users of smartphones (movies, e-mails, websites), and will probably be offered for free to retain customers.
This trend and the need to invest huge amounts to build 4G networks (LTE), ultimately needed to support smartphones, means that the coming years will be a big test for the CFOs of telecommunications giants.
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Saigon recognized its telecommunications facilities as tourist attraction | and wittily promotes them, among other things, on T-shirts |
The module can multiplex up to 6 transport streams (MPEG-2 TS) and convert them into COFDM modulated DVB-T RF channel (multiplex).
View of the re-multiplexer and modulator DVB-T TRX-360 R81709
The modulator has 6 inputs for feeding MPEG-2 TS streams. The digital data streams are provided by RDC-313 R81710, DM-313 R81712, or MD-330 R81713 (encoder) modules. The RDC-313 and DM-313 modules provide whole satellite transponders received by the headend. The user can remultiplex the streams, i.e. select interesting channels and place them in the output multiplex in DVB-T standard.
The maximum bitrate at the output of the modulator is 31.66 Mb/s. In practice, it translates into 6-7 channels of standard definition (SD) or 2 channels in high definition (HD). Remultiplexing the streams, the user should include a 10% safety margin (determining the maximum bit rate for the whole multiplex, which should not exceed 29 Mb/s).
The application of TRX-360 R81709 in an existing headend. 6 channels received by the RDC-313 R81710 receivers (MPEG-2 TS) are fed to the inputs of the modulator. They can be distributed as a DVB-T multiplex comprising these 6 channels. Additionally, each RDC-313 receiver provides an analog signal (PAL).
Modification of CCTV system - wireless video transmission.
The owner of a production plant wanted to extend the existing monitoring system. The first step, already completed, included the installation of a CCTV network throughout the production hall and administration offices.The modification involved relocating the monitoring center and providing the video from the cameras to the gatehouse.
Modification of the CCTV system based on TREND 250 DVR:
the data is transmitted in LAN and wirelessly, using CAMSAT devices
the data is transmitted in LAN and wirelessly, using CAMSAT devices
The existing system has been based on TREND 250x8 DVR ( M72508). It would be very difficult to do new cabling running from the cameras to the relocated monitoring center, so the best solution was to leave the DVR in the "old" place and use its LAN interface and the network infrastructure of the building.
The newly formed monitoring center employs CMS Software allowing for a network connection with the DVR. It enables the surveillance staff to have full access to the DVR.
Additionally, the highly efficient TP-Link TL-WR1043ND N3253 wireless router located in a suitable place in the building enables guards to monitor the cameras via PDAs with Wi-Fi while making their rounds.
The newly formed monitoring center employs CMS Software allowing for a network connection with the DVR. It enables the surveillance staff to have full access to the DVR.
Additionally, the highly efficient TP-Link TL-WR1043ND N3253 wireless router located in a suitable place in the building enables guards to monitor the cameras via PDAs with Wi-Fi while making their rounds.
The gatehouse at the entrance has been equipped with an analog monitor. The video signal is provided using a wireless A/V transmission system for outdoor applications - TCO5807h M1559. The set ensures high performance of video transmission even in high-noise industrial environments.
The video for the gatehouse guard is taken from the SPOT output of the DVR (full screen video on camera by camera basis). During the day, the output operates in continuous mode (the channels are switched regularly). At night, with active motion detection mode, the output provides video from the channel in which an alarm event has been detected, up to its end or cancellation.
By using these devices, the owner significantly increased the functionality of the CCTV system for a low cost. Both the owner and the security staff appreciate the changes.
Useful features of modern PTZ cameras.
DIS (Digital Image Stabilization) - allows to eliminate the influence of camera shake on the generated image. It is particularly useful in cameras with a large optical zoom, like M1196 (36x), where at high zoom levels even small vibrations would cause image blurring.
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Image blurring caused by vibrations (DIS OFF) | The same conditions and DIS ON |
Auto-zoom (Smart Zoom) - dynamic zooming on the part of the image where some movement has been detected. The zone is increased to a certain size, but after a defined period the camera returns to the previous optical zoom level.
ACTi in F1!
Yas Marina Circuit is the racetrack in Abu Dhabi, United Arab Emirates. The track has a length of 5.554 kilometers, and since 2009 season it hosts Formula 1 races. The cost of constructing the racetrack reached the amount of $1 billion. On February 17, 2010, it was announced that the former owner, Aldar, sold the facility to the government of Abu Dhabi.In order to improve the safety level during the races on the Yas Marina Circuit, a new IP CCTV system has been deployed, based on ACTi cameras. 380 cameras ACM-3511 K1315 have been installed, and the existing analog cameras have been connected to the new system through video servers ACD-2100 K2113. The video servers integrated the older cameras into the network.
The built-in IR illuminators of the K1315 cameras ensure good visibility in the less illuminated areas of the facility.
The built-in IR illuminators of the K1315 cameras ensure good visibility in the less illuminated areas of the facility.
Block diagram of the system
The main reason for choosing ACTi cameras was the high image quality provided by the ACM-3511 model, its relatively small size, and high reliability, especially important during such large sporting events and essential for the protection of the spectators.
How to speed up mobile Internet?
The cause of a poor connection may be low wireless signal received by a GPRS/UMTS/EDGE/HSDPA/HDPA modem. The signal can be improved by using an appropriate external antenna and connector specific to the particular model. How to measure the speed, how to increase it? - Welcome to the movie.
Access Point modes (example: TP-LINK TL-WA500G N2941).
Typical Access Point supports the following operation modes:
- Access Point Client - device operating in this mode connects wirelessly to an external WLAN network (it becomes a wireless client). The users' computers are connected to the device via LAN ports. This mode is used mostly for connecting multiple computers to an external WLAN.
- Repeater - the device amplifies the signal from another Access Point and forwards it. This mode is useful, for example, in houses and offices where the signal on other floors may be too weak for proper communication. In order to increase the signal we can just use this mode.
- Bridge Point to Point - allows to connect two Access Points. Other connections (e.g. with client stations) are blocked. This mode is often used for connecting two LANs together.
- Bridge Point to Multi-Point - allows to combine multiple APs together, where any device with its MAC on the list can connect with any other device included in the list.
More information on this subject: Access Point Modes
(example device: TP-Link TL-WA500G).
(example device: TP-Link TL-WA500G).
The idea of Repeater mode
New products offered by DIPOL:
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We have written about:
Video transmission via twisted pair cable - when and why to use it? Transmission of video signals from cameras via coaxial cables or twisted pair cables and passive devices can be performed over distances up to 400 meters. This limitation is due to the amplitude and phase distortions of the transmitted signals, which increase with the length of the cables.
Twisted pair cables in natural way eliminate the influence of external interferences (they are practically identical in both wires and cancel at the differential input of the receiver). This feature, combined with four pairs and lower cost of UTP cables in comparison with coaxial cables, is the reason that they are often used for longer transmission lines...
Video transmission via twisted pair cable - when and why to use it? Transmission of video signals from cameras via coaxial cables or twisted pair cables and passive devices can be performed over distances up to 400 meters. This limitation is due to the amplitude and phase distortions of the transmitted signals, which increase with the length of the cables.
Twisted pair cables in natural way eliminate the influence of external interferences (they are practically identical in both wires and cancel at the differential input of the receiver). This feature, combined with four pairs and lower cost of UTP cables in comparison with coaxial cables, is the reason that they are often used for longer transmission lines...
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Multiswitch system with 700 outlets in a 35-story building. The design and implementation of such an installation is a major challenge for the designer and installation company.
The job can be properly done only when the designer and the contractor employ first-class equipment...
The job can be properly done only when the designer and the contractor employ first-class equipment...
The design of the multiswitch system for 700 outlets
Monitoring of water and wooded areas with the use of ULTIAIR equipment and a cellular network. In such areas it is difficult to install cable systems. It is much easier to use wireless devices, such as from ULTIAIR family. The simplest IP CCTV system can be based on outdoor 1.3 Mpx cameras from ACTi - ACM-1231 K1511...
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Index of published issues
