In the modern organization as a workplace, and in many cases, leisure after work, have virtually become an integral part of the means of information transfer. Yes and no denying the fact that the possession of the necessary knowledge in our time is similar to the physical possibility of movement of a living organism. Suggestive phrase "movement is life" can be supplemented with "a life - is information." It was in this environment, information is the dependence modern man. To solve the questions of the organization fast, reliable connection from the beginning of the last century using wired channels. It is this method still remains the most functional and reliable quality, and digital modems are now made inexpensively by using already available in almost any terrain two-wire communication lines, to organize a point of access to corporate channels or the Internet, without depriving the consumer is already installed on this line analog telephone.
The most promising technology currently has ADSL, to turn the twisted pair telephone wires in a tract of high-speed data transmission. ADSL line connects two modem ADSL, which are connected to each end of the phone cable. The main constituents of the organization ADSL - connections are the DSLAM (the device on the provider), ADSL-modem (the device on the user side), or twisted-pair telephone cable. In this case, organized three information channels - outgoing digital data from the user of incoming digital data and channel the regular telephone line (POTS). Telephone channel is allocated using filters, which guarantees the performance of your phone, even in an emergency connection ADSL. In data transmission technology is asymmetric - the speed of incoming flow, etc. data that is transmitted in the direction of the end user is higher than the rate of outgoing flow, ie transmitted from the user towards the network. But at the same time, the speed of data transmission from the user is still significantly higher than when using an analog modem. In fact, it is much higher than in the channels of ISDN (Integrated Services Digital Network - Digital Network Integrated Services).
Conducted a small quantitative comparison of communication technologies. Analog modems can transmit data at speeds ranging from 14.4 to 56 Kbps. ISDN provides a data rate of 64 kbps per channel (usually the user has access to two channels, a total of 128 kbit / s). Various DSL technologies enable the user to transmit data at speeds of 128 Kbps (IDSL), 768 kbps (HDSL), "downward" flow of 1.5 - 8 Mbit / s and bottom-up flow of 640 - 1,000 Kbps ( ADSL), "downward" flow of 13 - 52 Mbps, and "bottom-up flow of 1.5 - 2.3 Mbps (VDSL). Cable modems have a data rate of 500 Kbps to 10 Mbps. (It should be borne in mind that the bandwidth of cable modems is shared among all users, while having access to that line. Therefore, the number of concurrent users has a significant impact on the real data transfer rate of each.) Digital lines E1 and E3 have a data transfer rate , respectively, 2.048 Mbps and 34 Mbps. ADSL technology enables data transfer at speeds up to 8 Mbps at a distance of 5.5 km on a single twisted pair of wires. Development of technology has led to the emergence of ADSL2 + speeds up to receive 24 Mbps and transmission of up to 2 Mbps.
Hero of this review was a set of equipment provided by Ukrtelecom the ADSL Internet access, modem SmartAX MT880. With access to the equipment fairly well as a router and firewall, it can rightly be regarded as a compact hardware implementation of the access server to the network segment. This decision raises a new level of quality customer service, collected in a convenient and reliable device, all the new technological opportunities to build communication links. Typically, they allow, with proper tuning of its fully protect against all kinds of intrusions, interference, hacking and attacks on information circulating or stored on your local network segment. Providing good data rate, due to relatively rapid filling, versatile solutions for small business and home networks can not even sophisticated users can easily take advantage of access to any information sources, corporate network or the Internet.
Collection of characteristics was made according to information provided by the manufacturer's website and on the actual capabilities of the built-in WEB interface test ADSL router.
Packaging
Outer packaging is made of thick cardboard, c good quality design and stand out the model name and the name of the manufacturer. On the right side there is a sticker with the serial number and distinguishing information is this particular model. All done in a strict conservative style without so characteristic of today's market slogans and attract numbers often do not speak to the user, but inspire the superiority of this particular product with its size.
Completion
Set the connection to an ADSL line from Ukrtelecom model Huawei SmartAX MT880 ample, there is all that is needed for the job.
The set contains:
- Router Huawei SmartAX MT880.
- CD-ROM with documentation.
- Unfilled warranty card.
- Patch cords to connect to a Fast Ethernet network user.
- Two wire phone connection.
- ADSL SPLITTER to separate data channel on the frequency of transmission of the telephone line.
- Stand for vertical installation.
- Power supply from the external network.
This model has a plastic body, made in shades of white with a brown bottom. The whole body dotted with vent holes that are very practical in mind pretty hot morals "of the device during operation.
The reverse side is also not distinguished by originality of design. Of the features include the possibility of mounting the model on the wall, the presence of four feet of black rubber and a fairly large number of elongated slots ventilation.
The back side has a number of connectors and controls. Considering this pattern from left to right, first of all see the nest under the RJ-11 connector «ADSL» line - WAN interface of the modem is on LAN connector «Ethernet», then hidden in the body from being accidentally pressed the reset button «Reset», then go button power outage «Power» and finally the connector connecting an external DC source. Reset (factory reset) by pressing the button «Reset» in retaining more than five seconds while the unit.
The front panel of the device are signed by the indicators of the model. There is a display of power «Power» on the device, blinking diodes activity «ACT» and the presence of compounds «Link» to «ADSL» and «LAN» interfaces in this router.
Going to the bundled power supply production DVE has an incoming voltage AC 230V - 50Hz Output 12V - 800mA.
Software.
Surprisingly there is no favorite with all the developers and facilitate the user first start, sequential interactive adjustment algorithm. The main element of control here was the Web-based interface with very flexible and diverse work settings, ADSL modem / router.
The bookmark list is Web-based interface begins rather peculiar, with a menu «Status», points of which were «System Information», «Service Information» and «Statistic» with details about the system, its configuration and the small statistics work.
In the menu of basic options «Basic» bookmarks «ADSL Mode» selected work standard ADSL interface (possible settings and their high-speed modes are specified in the table of characteristics) and here you can enable or disable Bitswap on outbound or inbound streams.
«WAN Settings» allows you to configure each of the incoming PVC to the desired user version of the work. It is possible to use the six variants of the connection: PPPoA, PPPoE, IPoA, Pure Bridge, Bridged + DHCP, Bridged + Static IP. For each of the methods is the relevant additional settings.
Follow the bookmark menu «Basic», you can: set the IP address of the LAN interface, enable and configure the DHCP server, specify the primary and secondary DNS server set configuration options for NAT mode DMZ («transfer" to a specific IP intranet for all incoming packets), NAPT or "transfer" of certain ports to specific IP addresses of internal network, there is a pretty serious setup static routing, the last menu item will set the priority of ATM data stream.
Bookmarks Menu «Advanced» you can customize: the work on the RIP protocol interfaces, the main parameters of the firewall, and a fairly advanced IP Filter; set mode QoS; blocking certain fixed protocols; mode ILMI; access to the administration of certain IP LAN and WAN interfaces; Enable UPnP.
Menu Items «Tools» allow you to specify: the user names and passwords as an administrator and regular user to view, test all components of the system of ADSL modem, pour from the local machine firmware, save or load a configuration, there is a simple logging system events, items save settings and reboot the modem software.
Summing up the possibility of internal software, we can talk about the normal equipment of the firmware, how to position the device in the segment of business solutions to small load on the network communications. Here there is a lot of relevant technologies and capabilities, but along with a fairly extensive set external firewall is the absence of filtering by MAC address, and limit access to certain URL. But there is a very good static router.
Conclusions
ADSL modem / router SmartAX MT880 Huawei's can be recommended as a cheap solution for network access via ADSL, ADSL2, ADSL2 + channel through an HTTP connection PPPoA / PPPoE / IPoA / Pure Bridge / Bridged + DHCP / Bridged + Static IP with the possible speed up to 24 Mbps. Along with pretty good quality work and ensure proper functioning of the normal, this model has good support from the developer and a very nice price for a solution to such a level. Its distinguish from the competition is easy enough to configure an interface with a complete, comprehensive solutions routing and firewall.
Pros:
- Very practical and rigorous design.
- Rather small and compact size.
- A small price for the decision at this level.
- Good speed data transmission.
- Easy to set up and functional WEB-interface.
- In some cases, the application changes are complete reboot the router.
- Lack of filtering by MAC address, and limit access to certain URL.
- Fairly high heat for a robot.
- At some point the normal work reconfiguring interfaces becomes impossible, helps complete reboot.
Credits to Valery Parovyshnik
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