POTS (Plain Old Telephone Service), also known as PSTN (Public Switched Telephone Service), refers to the dominant telephone service in most residential and small business environments. A telephone company controls POTS, which allows consumers to make and receive calls on one line at a time. POTS differs from PBX, T-1, T-3, ISDN, VOIP, and other digital telephone services, which provide telephone services to multiple lines at a time and usually include many advanced features that POTS does not have.   How POTS Works POTS relies on a telephone cable that Read More

An iPad is a tablet PC that Apple produced, which provides the hardware and software components found in both Mac PCs and iPhones. While iPads are not as large as Macs or as small as iPhones, they are able to perform the same tasks as a computer while also being extremely lightweight and portable. iPads generally include support for touch screen, WiFi, Bluetooth, and 3G as well as tethering to other devices.   What is iPad Tethering? iPad tethering is a term used to describe the iPad’s compatibility with another Read More

S-Video is an abbreviation for Separate Video and is also known as the Y/C. it is an analogue video signal that carries the video data as two separate signals; these signals are luma (brightness) and chroma (color). The S-Video can be thus contrasted with composite video, which carries picture information as a single component, albeit of a poor quality. Another signal is called component video and this one carries picture components in three separate signals, one luma and two chroma components. Basically, S-video is used to transmitting a television signal Read More

Solar panels are technically any kind of panel that uses solar thermal energy to produce electricity. There are a variety of panel types, from those used to heat water as with solar hot water panels, to those which are used to store solar energy, such as solar thermal energy panels. Furthermore, a solar panel can be described as a photovoltaic panel, which is what is used in the professional solar power industry to generate electricity from the rays of the sun. Despite the type of solar panel being discussed, almost Read More

A queue is a line of persons waiting for their turn at some service counter. The service counter can be a ticketing window of a cinema hall, a railway station, etc. Depending on the type of service provided by the service counter and number of persons interested in service, there could be queues of varying lengths. The service at the service counter is on the first come first serve (FCFS) basis, i.e., in order of their arrival in the queue. Suppose that at a service counter, t1 units of time Read More

Security has always been a priority concern of IT professionals, especially the Chief Information Officers (CIOs) who hold ultimate responsibility for their company’s computer and Internet security. In the years since the Internet first came on the scene, the security scenario has undergone rapid changes and developments as threat and counter-threats have been developed and deployed. Recent surveys tend to confirm this perception. While IT security threats continue, the form and nature of these threats may not be what most people expect – or even suspect. The following are the Read More

The Subscriber Connector (SC) is a fiber optic connector with a push-pull latching mechanism that provides quick insertion and removal while ensuring a positive connection. The SC is also available in a duplex configuration. It has a benefit in keyed duplex capability to support send/receive channels. This connector is commonly used for most modern network applications. The SC is a snap-in connector that is extensively used in single-mode systems for its remarkable efficiency. Subscriber Connectors are inexpensive, trouble-free, and robust. They give precise positioning via their ceramic ferrules. The square Read More

A known plaintext attack is an attack where the cryptanalyst has access to the ciphertext and the plaintext of one or more pieces of data. A known plaintext attack is somewhat easier to mount than a chosen plaintext attack, because a known plaintext attack does not require the cryptanalyst to be able to feed data into the encryption device, it only requires him to know what data is being fed into the device.

Mounting is a term in computer science that refers to placing a file in a “virtual disk” that allows users to play games and access other programs without a physical CD or DVD. Games and software that are mounted in a virtual disk function in the same way as they would via a physical disk because a virtual disk allows the computer to process the data in the same way a CD or DVD player would. Mounting is very easy, but may seem complicated to inexperienced users.   Where to Read More

A satellite phone is a mobile telephone which communicates using satellites instead of using cell towers. Three major satellite phone networks are currently in operation: Iridium Globalstar Thuraya Iridium The Iridium network uses 66 low earth orbit satellites in polar orbits 485 miles above sea level. The use of low earth orbit satellites helps minimize round-trip-time, which greatly improves the perceived quality of the phone call. The Iridum network is able to provide complete global coverage. There is no spot on the Earth where you will not be able to Read More