How to solve compatibility problems between a TP-LINK 3G router and some 3G modems?

For a wide compatibility, TP-LINK company tests its routers with all popular 3G modems and continually updates the firmware and the list of compatible modems. Despite these efforts, there may be some items that present compatibility problems.

To solve such a problem, the user can perform the following actions:

• Way 1. Due to the mentioned constant firmware updating, the user should first try to find the 3G modem on the current list of compatible devices. If the modem is on the list but the status window of the router shows information about an unrecognized device (Unknown Modem), the user should update the router firmware. The latest firmware is available at tp-link.com. After downloading, it can be installed by selecting System tools->Firmware Upgrade.

• Way 2. If a 3G modem has not yet been included into the latest firmware update, there is a chance that the suitable software can be found in 3G Modem Bin File Center. The suitable binary file should be downloaded onto a computer's hard drive and then loaded to the 3G router.
   

3G UMTS/HSPA TP-LINK router TL-MR3420 802.11n 300Mb/s N2957	3G UMTS/HSPA TP-LINK router TL-MR3220 802.11n N2958
3G UMTS/HSPA TP-LINK router TL-MR3020 802.11n N2959	Mobile 3G TP-LINK router TP-LINK TL-MR3040 N2960

Multimode or single-mode fiber?

In recent years, due to the wide use of fiber optic technology for data transmission, the market has experienced large declines in prices of optical cables and devices, so they have become accessible to many users. They often consider which kind of the cables and equipment will be optimal for their applications, multimode or single-mode?

The best solution is to compare the total prices of the materials and devices for a particular application. Let's think of a 100 Mbps fiber-optic link. This task can be carried out with the use of a pair of media converters. In the case of using multimode fibers, it can be L10021, with range up to 2 km (requires two fibers). Similar pair of media converters for a link with two single-mode fibers is L11041.

Chart showing comparison of costs of fiber optic links based on multimode and single-mode fibers,
taking into account the prices of the mentioned active devices

The pair of media converters for multimode cables costs ca. 20% less than that of the single-mode equivalent. However, due to lower prices of single-mode cables, the difference in total costs is compensated even in the case of comparatively short links (50 meters). The comparison is based on the prices of universal cables with 4 fibers, L7644 and L7354.

The conclusion is that installations based on multimode fibers are cheaper only in the case of very short links, but generally the difference is no so large. Due to larger potential of single-mode fibers, the choice of single-mode solutions is more prospective. Multimode fibers should only be used for very short links, in server rooms etc. Single-mode fibers are basically the only reasonable solution for data transmission over greater distances.

"Gigabit Wi-Fi" for everyone now

D-Link Corporation, one of the world's largest network equipment manufacturers, has introduced Wireless AC1200 Dual Band USB Adapter supporting 802.11ac draft standard. Although first 802.11ac devices were offered on the market six months ago and the first company in the world that presented a prototype of 802.11ac router was Buffalo at January's Consumer Electronics Show in Las Vegas, the product of D-Link really opens up the market for this kind of equipment. The adapter enables the user to transfer data wirelessly at speeds about 1 Gbps, which is ideal e.g. for flawless HD video streaming.

D-LINK AC 1200 adapter supporting 802.11ac draft.
Although at present the price is rather high (about $90, several times more than the cost of popular 802.11n devices), everyone can expect that D-Link will be followed by other manufactures, including TP-Link,
and the cost of such solutions in 2013 will not be a barrier for most potential users. [dlink.com]

The "Gigabit Wi-Fi" is based both on solutions used in the IEEE 802.11n standard and new ones, which together allow for the unprecedented throughput. The devices compliant with the future 802.11ac standard (the approval of its final specification is expected in late 2013, the current devices are based on draft 4.0) will operate in the 5 GHz band, at data transfer rates at the level of 1 Gbps (multi-station WLAN throughput). However, there are plans for 2015 to launch first chipsets enabling wireless transmission transfer rates up to 7 Mbps, previously unimaginable for this medium.

Such data rates will be possible with the use of high-density 256 QAM modulation, extra-wide 160 MHz channels, and up to 8 MIMO spatial streams. Additionally, Multi-user MIMO (MU-MIMO) technology will allow multiple clients (each with one or more antennas) to transmit or receive independent data streams simultaneously. In the case of using several antennas, the Space Division Multiple Access (SDMA) well known from MIMO applications in n standard can provide higher throughput as well. The 802.11ac chipsets supporting MU-MIMO are expected in 2014.

Comparison of data transfer rates provided by 802.11ac and 802.11n solutions
[dailywireless.com]

 

 

Other leading manufacturers, such as Netgear, Cisco/ Linksys, also expand their offerings with 802.11ac devices. It is expected that in 2013 - along with the official approval of the standard - the market will also offer laptops with wireless cards in this this technology. The response of smartphone industry can be even quicker - in late 2013 probably 70% of smartphones will be equipped with the appropriate chipsets. The next two years will show how quickly the 802.11ac standard penetrates the WLAN market. The 802.11n standard, approved in 2009, and winning real popularity in 2012, would have to go to early retirement. So, it seems that wireless standard developers and equipment manufacturers are slightly ahead of the current needs of the users.

The beginning of a revolution in medical care

Isonas, a British company, announced that in collaboration with Fujitsu and Tolven companies it had developed the world's first wireless medical monitoring system based on cloud computing, compliant with the guidelines of the European Medical Device Directive (MDD).

The system consists of network procedures for recording and analysis of medical data and certified sensor LifeTouch HRV011 continuously measuring five vital parameters and providing them wirelessly in real-time: Heart Rate (HR), Respiration Rate (RR), Blood Pressure (BP), Pulse Oximetry (SpO2), and Temperature (T). Other sensors can be easily added to the network.

The system can be used both for large groups, for example, all residents of a city, and in some hospitals. Currently, practical tests are conducted on a group of hospital patients in the Netherlands, the system will soon be testes in the UK and India.

The LifeTouch HRV011 sensor is one of the elements of the certified wireless medical care system based on cloud computing

source: www.isonas.com

 

 

New developments associated with remote medical care are also visible in the U.S.A. In May, the FCC (Federal Communications Commission, agency that regulates the rules for the use of radio frequencies in communication), approved the technical studies on the assignment of radio spectrum for wireless monitoring of patients. The spectrum for MBAN (Medical Body Area Network) will be allocated between 2.360-2.400 MHz. The final approval of the standard is planned for 2013.

The new technologies have to incorporate two principles: to provide the patient with basic medical supervision at the appropriate level and reduce the costs, compared to conventional systems. Additionally, through online monitoring and analysis of the data doctors can immediately react to potential threats to the patients.

How to set up video streams of IP cameras?

All Sunell IP cameras enable the user to define two independent H.264 video channels. This feature allows for creating high quality stream for video recording and lower quality stream for monitoring over the Internet, e.g. on mobile devices.

Depending on the purpose, the menu of the cameras provides several levels of video compression (Video Encode Type):

• Base Profile - for low-cost applications that require additional data loss robustness like in mobile environments.
• Main Profile - used for standard-definition imaging, e.g. on tablets, netbooks etc.
• High Profile - dedicated for monitoring in local networks and for high-definition video recording. The compression is more effective than in the case of Main Profile (file size ca. 10% smaller for the same quality), but it requires the highest processing power.

Depending on the number of cameras and link/network capacity, the user should select:

• required image Resolution (1920x1080/1280x720/640x360);
• Frame Rate (1...25 fps);
• I Frame Interval (the interval between reference pictures that represent fixed images independent of other picture types). If a camera monitors an area with low traffic, higher values will save the band without noticeable deterioration in image quality;
• Bit Rate type and value (VBR - variable bit rate which cannot exceed the maximum value defined below by the user, dedicated for monitoring low-traffic areas, or CBR - constant bit rate, also defined by the user, dedicated for monitoring more dynamic envirinments);
• Quality level, within the 1 (minimum) to 9 (maximum) range.

Stream parameters must be chosen with care and tested in practice - too high settings will result in ​​unnecessary load on the network and the NVR's CPU, too low values will degrade the image quality.

Multiswitch SMATV system in a 5-staircase building

The requirements for the building installations included SMATV system providing each outlet with DVB-T and SAT signals (from a single Hot Bird position).

The building has five staircases with a 40 m spacing. There is an underground garage in the basement below the ground level (first flloor). The basement should be used for the distribution of the signals to all the staircases (the investor did not want separate systems in individual staicases) via a bus composed of five Triset-11 PE E1025 cables.

View of the project of the SMATV system designed with the use of free SatNet utility
Instructional video on the use of the software

 

 

Due to a large number of the outlets in the building (ca. 300), the optimum choice was multiswitch system based on a bus architecture and MSV-5xx multiswitches.

 

In this implementation, three stories in each staircase have been equipped with MSV-516 R70716 multiswitch and satellite splitter or tap from Terra SS-5xx series with the loss resulting from the energetic balance. The exception is the last, fourth floor, equipped in each staircase only with the MSV-516 R70716 multiswitch. The total number of outlets in each staircase is about 60.

The system is powered from SA 501 R70501 amplifiers located in each staircase, via H lines.

Time for a global M2M platform

At the end of November in Johannesburg, Vodacom from Vodafone Group Plc announced the start of a new M2M initiative called Global Data Service Platform (GDSP). The project is a part of the policy of the group being a global service provider for M2M solutions. GDSP is aimed at international companies and organizations wanting to use automatic and unassisted global communication among various devices.

GDSP is a service that not only allows the transfer of information and communication between devices scattered around the globe, but also enables the user to fully manage and control the whole system. This pioneering solution provides means for users to analyze in detail the flow of information between different points, as well as to control each individual point. The operation of such a network is not complicated - the management, control and analytical tools can be easily accessed by an intuitive graphical interface.

M2M (Machine-to-Machine) technology is based on the ability of devices connected to the network for collecting, processing and exchanging information without human intervention. The development of mobile technology in recent years has made this application area the leader in terms of annual turnover: $ 445 billion. Independent organizations estimate that by the end of 2020 the number of M2M devices in the world will increase by 100%, from 6 to 12 billion. 

 

Businesses interested in M2M technology are logistics companies (fleet and asset management), banks (remote monitoring of subsidiaries, ATMs etc.), healthcare providers (continuous remote monitoring of biological data) and many others. The list of organizations and companies operating in dispersed locations is huge, so Vodafone, anticipating a significant growth of interest in M2M applications, has prepared 5 billion SIM cards to enable wireless communication for compatible devices.

The global growth of M2M applications will translate into an even more dynamic expansion of wireless data services for private customers. Research confirms that many consumers that can use WiFi connectivity choose 3G service. This shows how managed cellular networks are important for secure and reliable communication and data exchange.

How to maximize the capabilities of home routers?

Thanks to alternative software available on the Internet, many Wi-Fi routers can provide extended functionality. For example, the software may transform home router into NAS and print servers, increase forwarding performance, provide advanced analytical options.

Alternative software OpenWRT based on Linux (with optional graphical user interface) can be uploaded on selected models of wireless routers/APs. The software greatly extends the capabilities of the devices. It should be emphasized that all operations associated with the modification of the firmware are done at the user's risk. The best option is to install the software via a USB port of the router (if available, it can be also used to connect a hard drive, USB modem or printer; application of additional USB hub will enable simultaneous operation of several devices).

Home wireless network based on TP-LINK devices

OpenWRT software and additional information are available at that official site. In the case of other versions modified by some users, which can also be found on the Internet, one should pay particular attention to security issues. More on OpenWRT can be found in the article OpenWRT or how to maximize the capabilities of your router.

Long-range HDMI splitter

HDMI Splitter-Extender Signal-HD 1x8 H3607 enables the user to connect up to 8 modern TV sets equipped with HDMI inputs to one source of high-definition signal. The amplified output HDMI signal can be transmitted via HDMI 1.3b cable over distance up to 15 m. The seven RJ45 outputs allow for signal transmission over distances up to 50 m (using a CAT6 cable). The package contains the set of RJ-45 to HDMI adapters and power supplies. The features of the product make it ideal for demonstration of HD televisions and other equipment in stores, for offer presentation in HD quality in superstores, for distribution of video content (such as transmissions of football matches) in clubs and pubs etc.

HDMI Splitter-Extender Signal-HD 1x8 (7xRJ45, 1xHDMI) H3607

Application diagram

Will SAT>IP be a quantum leap in satellite reception?

In early November, SES, the world's leading satellite operator, issued a certificate of compatibility for Zinwell SAT>IP switch/ server, stating compliance of the device with the approved in 2011 SAT> IP standard. The ZIM-1800 switch/server from the Taiwanese manufacturer has become the second SAT> IP device that gained the approval of the organization responsible for developing this standard (the SAT> IP Project partners include SES, BSkyB, and Craftwork). The first certified SAT>IP converter was IDL400S Multibox developed by Inverto Digital Labs. Thomas Wrede, Vice President of Reception Systems at SES, emphasizes the fact that other Asian manufacturers are also interested in the certification. It seems that the rise in popularity of the SAT> IP technology is only a matter of the near future.

According to the SAT> IP standard, satellite signals are demodulated and then converted into IP streams that can be distributed through wired or wireless IP networks. The user of the network can independently watch satellite channels on devices such as PCs, laptops, tablets, and smartphones running dedicated applications. Of course, the content will also be available on Smart TVs and other televisions equipped with external network adapters or IPTV receivers (IP STBs). The communication protocol between the server and clients has been developed by the consortium of satellite operator SES, UK broadcaster BSkyB, and Danish TV software company Craftwork. SAT> IP is based on existing Internet protocols such as IP, UPnP, RTSP, HTTP, supplemented by a special extension for satellite content. The solution is compliant with DLNA protocol implemented in many consumer devices.

SAT>IP servers can distribute satellite media streams in unicast or multicast RTP/UDP (RFC2250) mode,as well as they support HTTP streaming. The delivery format is chosen by the client device.

One of the major advantages of the SAT>IP solution is its total independence from the Internet. Despite the use of IP technology, the transmission takes place only in the local network, not generating any additional costs (no need for higher Internet bandwidth). A typical home network operating at 100 Mbps will allow for simultaneous transmission of 8 different HD channels.

If the forecasts of the creators of the SAT> IP standard are correct, the year 2013 can bring a great revolution in consumer satellite market. With a range of certified devices, their prices should fall to levels acceptable by the majority of individual users of FTA channels and the operators of pay-TV platforms, which will change the form of using home television systems. A greater integration of television and home IP networks will lead to a practical implementation of the idea of ​​watching TV "everywhere and on anything" (at least in the home).