Review modems Huawei E220 and Option GT MAX 7.2 ExpressCard & USB Luxury

These modems are perhaps the best representatives of 3G modems under the operator Utel -acquired in http://3gmodems.com.ua shop. These modems are the advantages of the latest firmware to maintain speed up to 7.2 megabita per second (3.5G), a compact size - Huawei E220, and the availability of modern slots ExpressCard, as well as a universal adapter of a USB modem Option GT MAX 7.2 ExpressCard & USB Luxury. A first look at Modem Huawei E220. Package delivery of the device following: The modem comes in a plastic box with logos operator Vodafone (the device works perfectly for all GSM and 3G operators), as shown in the photo below: About the size of a modem can be seen in the photo below - which is compared with a box of matches. Modems have slots for the installation of SIM and USIM cards, as well as the connector for external antenna - in Huawei E220, it is hidden under the hull. Rear View Modem: The modem connects to a PC through a string of mini USB. After connecting, he found a CD with drivers - auto drivers and software installed. Then in the Mobile Connect configure the network settings and connections - and all ready to go. The speed of the Internet depends on the network operator, when measured in a room near the plant HTZ, with a weak signal was received the following parameters: Next, look at the modem Option GT MAX 7.2 ExpressCard & USB Luxury Package delivery of the modem as follows: The modem also comes in a plastic box, which is invested in cardboard. Appearance package, you can look at the photo below: Inside the box you'll find guidance on the use, CD-ROM with software from the ExpressCard adapter for mini USB. The modem has a flap outdoor antenna, and connector for external antenna. There is also a slot for SIM and USIM cards. ON-reaching set of easy to use - after installing the software need only indicate the APN operator - for UTEL respectively 3g.utel.ua. These modems are any other SIM card - check card operator Kyivstar and Life. The modem showed slightly better sensitivity blyagodarya external antenna. The speed Internet in Utel dependent on the network. My results: The speed of the evening new homes private sector 1502 to 334 Connection speed up to 7.2 Megabit.

Review of technology HSDPA, UMTS, WCDMA 3G - «third generation», a set of services that combine a high-speed wireless access to Internet service providers, and wireless technology, which creates a data channel. Characteristics Standard 3G - is a different approach to communication and information access. Those opportunities, and those devices which are traditionally seen as purely fixed, can now become mobile. You can not just talk with her interlocutor, but to see him through the videophone, traveling over the Internet to do business, study, entertainment, and all this with a small device, reminding today's cell phone. Naturally, these services require high-speed data transmission. To that end, provides step-by-step upgrading of existing networks for mobile communications, which were originally designed for a narrow-band transmission of data to broadband networks, providing the necessary speed for mobile multimedia services and high-speed Internet access. Third Generation Mobile Communication is based on packet data. To implement the third generation of recommendations for a unified global standard for mobile communication: voice quality comparable to the quality of transmission in wired networks, security, comparable to the security of wired networks, providing national and international roaming, support of several local and international operators ; Efficient use of spectrum, packet switching and channel; support multi-cellular structures; interaction with satellite communications systems; gradual build-up data transfer rates of up to 2 Mbps. While the ultimate goal for the entire telecommunications industry - to create a single worldwide mobile communications environment that supports broadband systems and provides global mobility, as a result are likely to arise for a family of standards, providing services to third generation. 3G mobile network operating at frequencies decimetre range of about 2 GHz, transferring data at speeds of 2 Mbps. They help to organize a videophone connection, watch movies on your mobile phone and television, etc. The world co-exist two standard 3G: UMTS (or W-CDMA) and CDMA2000. UMTS distributed mainly in Europe, CDMA2000 - in Asia and the USA. According to Wireless Intelligence, at the end of November 2006 there were 364 million subscribers of 3G, of which 93.5 million were connected to networks and UMTS 271.1 million - to SDMA2000. The largest operator - Japanese NTT DoCoMo (40 million subscribers). The term 3G is used to describe the services of mobile communication standard next (third) generation, which provide better quality sound and high-speed Internet access and multimedia services. Mobile networks third-generation (3G) networks are different from the second generation (2G), such as the digital mobile communication standard GSM and transitional generation (2.5G), such as such as GPRS - a much higher speed data transmission, as well as a wide range and high quality of services provided. While there are many different interpretations of what constitutes a 3G, the only definition adopted universally, is the definition issued by the International Institute of Telecommunications (ITU). ITU, working with industry organizations around the world, determine and approve the specifications and standards, as well as rules on the use of spectrum for 3G systems in the framework of IMT-2000 (International Mobile Telecommunications-2000). IMT-2000 - This recommendation, developed by the International Institute of Telecommunications (ITU), relating to the use of the frequency spectrum and the technical standards for the entire family of the 3rd generation. The recommendations describe the way the evolution of the world's standard 2-nd-generation standards in the 3rd generation. ITU demands that the network IMT-2000 (3G), among other properties, providing improved system capacity and efficiency of spectrum for 2G systems and support services of data transmission at speeds - at least 144 kbit / s, when used in mobile mode (not on the premises ), And a maximum of 2 Mbps, at no mobile environment (indoors). Based on these requirements, in 1999, the ITU approved five radio standards for IMT-2000, as part of the recommendations of ITU-R M.1457. CDMA2000 - is one of the five standards. It is also known as IMT-CDMA Multi Carrier in the classification of ITU. CDMA2000 3G offers a viable solution for any existing market cellular or PCS operator - as well as operators who already have a new license 3G. CDMA2000 has been designed so that any wireless carrier, regardless of the interface, the frequency or the core network standards, can benefit from its spectral efficiency. Taking into account the specifics of the world to date, cellular networks have been developed options for migration of these networks in third-generation networks. Continuing the description of the benefits of third generation networks, it could be argued that in addition to Internet access services and video communications, 3G customers will be able to take advantage of remote access to corporate networks. Third generation mobile communication is fundamentally alter such a thing as a mobile work. The incumbent will be able to carry out their tasks in any place, without even leaving the house. An important element of 3G services will be mobile e-commerce, as payment for goods and services will be via mobile phone. It thus becomes a virtual wallet. In addition, the developers seriously considering the possibility of launching such services as remote medical diagnosis. IMT-2000 provides: high-speed data transfer within the premises or in the open; symmetrical and asymmetrical data transmission; support channel and packet switching to provide services such as Internet Protocol (IP) and Real Time Video; high quality voice, rivals the quality of voice in the transfer of wired lines; more compact and more efficient spectrum utilization; the possibility of global roaming. Program IMT-2000 is based on a number of traits that define principles of construction of the 3rd generation and their architecture. Already in the first phase of deployment, they should provide some speed for different degrees of mobility subscriber (that is, different speeds of movement) depending on the amount of coverage: up to 2048 Mb / s to the low mobility (speed of less than 3 km / h) and local area coverage; up to 144 kbit / s for a high mobility (up to 120 km / h) and wide area coverage; 64 (144) kbit / s for a global coverage (satellite). Today, there are two main competing concepts of 3G: UMTS (Universal Mobile Telecommunications Systems - universal mobile telecommunication system), supported by European countries, and CDMA 2000 (Code Division Multiple Access - multidostup code division channels), whose supporters are traditionally Asian countries and USA. In principle, these two technologies involve two different approaches to networking 3G: Revolutionary (UMTS) and evolutionary (variety CDMA - CDMA2000, CDMA2000 IX, CDMA2000 IX EvDo). Evolutionary way implies the preservation of frequencies and gradual transition to new technologies, by increasing the technical capacity of the operator. UMTS - a new standard, while a variety CDMA, proposed for 3G, is the development of in-use technology in the world second-generation cdmaOne (IS-95). Currently, 3G networks are already working in Asia, USA, while in Europe there is still only in test versions. The most impressive success in 3G in the world has made against Japan. There currently are two operators that provide services to third-generation - is NTT DoCoMo and KDDI. By 2003, Japan will be the third operator, which owns a network of 3G - J-Phone Communications. Using CDMA2000 and WCDMA technology, the first global commercial 3G networks are already serving millions of subscribers. By the end of October 2002, KDDI connected 3.9 million subscribers CDMA2000, NTT DoCoMo - 149000 subscribers FOMA (WCDMA). Also by the end of October, the total number of subscribers in Korea stood at more than 15 million subscribers CDMA2000. According to figures for December 16, 2002 in the world is running 32 third-generation networks in 16 countries. 3G in Ukraine In December 2006 the company «Telesystems of Ukraine» announced the start of January 2007, the network 3G «PEOPLEnet» standard CDMA2000 1xEV-DO 1 Nov., 2007 State Enterprise Board has launched a 3G mobile phone network under the brand «Utel» (official site). Network «Utel» works in the standard UMTS 2100 with the add-in HSDPA (3,5 G). If the basic version of UMTS provides peak speeds up to 2 megabits per second for static objects near the cell, and 384 Kb / s for mobile users, the devices supporting HSDPA data speeds in theory could reach 14.4 Mbits. In practice, actual speeds rarely exceed 3 megabita, but in a tight space and the density of the network and the lower. It allows you to videozvonki, broadband Internet access and view streaming video online. To date, this change in Ukrainian services to 3G-operators. 3G-coverage operator covers all regional centers, major cities and resorts of Ukraine. At the time of construction of the network coverage outside 3G-network subscribers «Utel» ensured by national roaming in GSM-network ZAT «Ukrainian radio» (TM «Beeline»). In doing so, the cost audiozvonkov and sms-messages remain the same as in the area of 3G-network. HSDPA (s High-Speed Downlink Packet Access - high-speed packet data transmission from the base station to mobile) - standard for mobile communications, is considered by specialists as one of the transitional phases of migration to technology fourth generation mobile telephony (4G). The maximum theoretical data transfer rate for a standard of 14.4 Mbps., Achievable in the existing networks - about 3 Mbps. WCDMA (Eng Wideband Code Division Multiple Access - wideband CDMA) - Technology radio chosen by cellular operators to provide broadband radio access to support services 3G.Tehnologiya optimized for high-speed multimedia services, video, Internet access and video conferencing; provides speed access up to 2 Mbps over short distances and 384 kbit / s at large with full mobility. Such values require a data transfer speed broad band of frequencies, so the bandwidth of 5 MHz WCDMA. Technology can be added to existing GSM networks and the PDC, which makes the WCDMA standard for the most promising in terms of utilization of network resources and global interoperability. UMTS, universal system for mobile communications (Universal Mobile Telecommunications System, USMS) - technology provider, relating to the generation of 3G. As a method of data transmission through the airspace of technology W-CDMA: standardized in accordance with the draft 3GPP response of European scientists and manufacturers claim IMT-2000, issued by the International Telecommunication Union as a set of minimum criteria cellular network of third generation 3G. With a view different from competing solutions, USMS (UMTS) is also often referred to as 3GSM to highlight of the technology for 3G mobile networks and its continuity in the development of networking standard GSM.