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Internet Speed Test

Speed test is a tool for checking the speed and quality of Internet connection. Through it users can connect with servers placed all around the world and measure the data download and upload speed. Moreover, the ping test shows the ping time of the server, name of the Internet service provider and approximate localization. Read more...

Free Speed Test

Get free speed test for your website to increase your stats. Download and unzip the packagage to your web server into the root directory. Then you can open application via http://yourdomain.com/speedmini. Next customize color schema by changing colors.xml file in the speedmini directory. Read more...

Knowledge about internet technologies

DSL Technology

DSL (Eng. Digital Subscriber Loop) - a digital subscriber loop, the family of broadband access to the Internet technology. The standard data reception speed fluctuates between128 Kbps up to 24,000 Kbps, depending on the applied DSL technology and its level. For ADSL technology, the speed of dispatching data is lower than its speed of data reception, but symmetrical to SDLS. Read more...

DVB-S Technology

DVB-S is currently one of the most popular methods of satellite access to the Internet. As every connection, DVB-S has its drawbacks and advantages resulting directly from its physical construction and laws that manage it. Major advantages include... Read more...

DVB-S Technology - Access Platforms

Initially the system designers planned to use a currently popular TCP/IP (Transport Control Protocol / Internet Protocol) protocol. The protocol in-question is known first and foremost for its proven functionality in cable media (Ethernet, xDSL, optical fiber). Read more...

Linux Router for small ISP

What was discussed on numerous occasions on our forum speedtest.pl, was the subject of the so-called long 'pings' which appear when the network is heavily loaded. In other words, I mean a situation when a few people start the peer-to-peer application. When there is no proper queuing implemented in the router, then the aggressive p2p pushes the remaining network movement out, by extension also the one from ICMP protocol (ping). Read more...

Optical-fiber Technology

FITL - the latest offer of world telecommunication concerns are fiber in the loop systems which enable common realization of various telecommunication and TV services. Such type of systems includes FITL system. FITL enables construction of a common network for rendering services to telephone and TV subscribers with limitation or complete elimination of hitherto used copper wires. FITL systems constantly try to live up to forever growing requirements towards public telephone network operators. Read more...

Optical-fiber Technology - Architecture

FTTC is an effective solution due to its price for a group of dwellings and residential areas. In this case the optical fiber reaches a street cabinet resistant to changeable weather conditions, near the road, often installed in places of termination of former copper track mains. This allows for usage of the already existing copper subscriber’s links and cable mains for further connection to subscribers. Read more...

Optical-fiber Technology - modes

Optical fibers are divided into single and multi-mode. This division results from the number of dispatched modes (rays of the light beam). Optical fiber modes are characteristic of the fiber and they determine layout of the field and the physical shape of the light beam settling in the optical fiber. The increased value of the light refractive index in core`s axis in relation to the surrounding coat makes the light beam, led through an optical fiber, has a tendency to remain directly in the core. Read more...

Security in WiMAX

It is known since recently that protections used in wireless networks are of key importance for correct performance of such a network, which WiFi network users know for sure. Creators of 802.16, usually called WiMAX, standard bore this in mind (in reality WiMAX and 802.16 do not mean the same thing, just like WiFi and 802.11). Mechanisms responsible for safety introduced into the standard are supposed to guarantee protection of this network, so-far unmatched by any other wireless network. Read more...

Session Initiation Procol in VoIP

SIP is a signaling protocol, slowly supporting H.323 and its main function consists in initiating sessions between clients. Basically, it provides various functions enabling operations such as dialing or the engaged signal. Additionally, it supports advanced possibilities of operating a connection, used by signaling protocol (used for signaling in conventional telephony). Read more...

Standards of Wireless LAN

Just like in other standards IEEE 802.x (ex. 802.3 Ethernet), standard 802.11 defines the physical layer (PHY - Physical Medium Layer) and the sub-layer for medium access control. Pic. 2 presents the basic model of reference of IEEE 802.11. In the picture-in-question the physical layer was divided into two sub-layers. The sub-layer dependent on the medium (PMD - Physical Medium Dependent) co-operates with the media characteristic of a wireless net, i.e. DSSS or FHSS. Read more...

Types of DSL Technology (ADSL, VDSL, RADSL)

Asymmetric Digital Subscriber Loop, ADSL is a technology that makes asymmetrical access to the Internet possible and one which is a type of DSL. The asymmetry consists in the fact that the dispatch of data to the user (the Internet) is faster than the other way around. The technology in-question was created with view to users who more often receive data (ex. from Internet websites) than dispatch them (ex. those who run an Internet server). Read more...

VoIP - Voice Over IP - Internet Telephony

VoIP (Voice over Internet Protocol) is a technology used for sending sound via network based on IP protocol, which is e.g. Internet. It allows for integration of telephony and data transmission into one net thanks to treating sound as an ordinary stream of data. Read more...

WiMax Security Authentication Aspects

Having received the second message, the base station checks whether the terminal has the right to use the network, using certificate X.509 for this purpose, presented in the Authorization Request message. If the terminal is authorized, then the base station determines what algorithms it will use for encoding movement along with the terminal, it activated the AK key for it and sends these data to the terminal in the Authorization Request message. Read more...

WiMAX Technology

WiMAX is a wireless access to the Internet technology whose aim is to provide broadband access to the network to end users, mainly in cities. It is based on the American IEEE 802.16 and European standards ETSI HiperMAN. WiMAX is an alternative to wireless networks, especially in areas where telecommunication network structure is poorly developed. WiMAX provides optimal solutions of the so-called last-mile problem, i.e. leading the link to its end user. Read more...

WiMAX Technology - Architecture

Next, it is worth mentioning the architecture and construction of the system. When it comes to its architecture, the system, in the basic version, operates in the point-multipoint architecture. We therefore obtain a centrally located base station and terminals connecting to it via radio are situated around it. Read more...

Wireless Local Area Network Technology

WLAN - Wireless Local Area Network - is at present probably the most popular and the most often used wireless way to access the Internet by the net users. However, this solution is not one of those that guarantees top quality of the services (QOS) but the price one must pay investing in the devices totally makes up for this drawback. Read more...

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