Data transmission

SDSL providing equal download/upload speeds. SDSL are more common for businesses that require the use of higher bandwidth and downloading/uploading speeds. ● Sat Modem (Satellite Modem) - These are the least common types of modems, and they primarily convert digital information with the use of radio waves to communicate with a satellite dish. These types of modems are most helpful for businesses and consumers who are located in rural areas. Of the types of modems listed and explained above, the two most that are prevalent in the consumer market are DSL and Cable Modems. Typically these modems are asynchronous devices, which means that these devices transmit data in a stream of packets. Additionally, when these devices receive data (typically through phone lines or cables), these asynchronous devices reassemble the data into a form that the computers can then…

channel. CDMA is a form of multiplexing which allows many signals to occupy a transmission channel and optimizing the use of available bandwidth. Therefore, the receiver separates the signals from the users by cross correlation of the received signal with each of the user unique code sequences. If the code sequence is designed to have a small cross correlation, it can minimize the crosstalk inherent. There is a spreading signal in code-division multiple access (CDMA) systems…

channel, activation and deactivation of radio transceiver, data transmission and reception are the tasks that is done by the physical layer. There are different physical layers. The choice of physical layer depends on the applications. The different physical layers are: Narrow Band (NB), Human Body Communication (HBC) and Ultra Wide Band (UWB). NB physical layer is used for the activation or deactivation of the radio transceiver and data transmission and reception. The PSDU (Physical Layer…

In data communication, they are always striving to increase throughput, this would include allowing nodes to transmit information over a single broadcast link without interfering with each other. To achieve this, multiple access protocols coordinate the transmission. The three classes of multiple access protocols are, random access, taking-turns and channel partitioning. With random access protocol, each node tries to randomly to use the complete broadcast link, without any regard to the other…

first phone data communication was invented by Alexander Graham Bell in 1874-1876. But the very first person to be able to convey sounds over a taut extended wire by mechanical vibrations was Robert Hooke in 1667 so it’s the culmination of work done by many individuals until Alexander Graham Bell created a telephone. The earlier development is when sound waves are carried as mechanical vibrations along the string or wire from one diaphragm to the other. A very good example is the tin can…

channel does not overlap with the signal from an adjacent one. because of scarcity of digital filters it was very difficult to filter closely packed adjacent channels. 2.Multicarrier modulation:- it is not convenient and efficient to transfer a high rate data stream through a channel, the signal is divided into a number of signals over that frequency range. Each of these signals are individually modulated and transmitted over the…

Unit Standard 6852 Assessment Task 1: Throughout history, cable types have changed quite a lot, whether is be for reasons based on speed - or security. The most common one that is usually referred to as “ethernet cable” today is CAT cabling. The generic blue cable that end users recognise as their internet service - this has become one of the most developed cable types in IT history. From CAT3 to CAT7, many improvements have been made to improve the quality of the cabling, such as giving it a…

This protocol is classified into rounds; every round composed of two phases; Set-up Phase (1) Advertisement Phase (2) Cluster Set-up Phase Steady Phase (1) Schedule Creation (2) Data Transmission A. Setup Phase: Every node selects independent of other nodes if it will become a CH or not. This selection takes into consideration when the node behaved as a CH for the last time. In the advertisement phase, the CHs inform their neighboring node with an advertisement packet that they become CHs.…

Three Colors: Red Questions 1. Throughout “Three Colors: Red” many themes were explored in this feature film. For instance, the first one we see appear in the film multiple times includes the technology aspect of using a telephone. When the movie opens up Michel makes a phone call to Valentine. As we hear the phone ringing we follow the phone line, which goes from the wire in his room, down the apartment, into the ocean, through a tunnel, then the message gets sent to Valentine who is living…

1762-IF4 is an Allen Bradley MicroLogix 1200 System with 4 Channel Current/Voltage Analog Input Module. It has a dimension of 90 x 87 x 40.4 mm. It has Delta-Sigma converter and 4 differential (bipolar) inputs. It’s analog operating voltage range is -10 – 10 V DC normal and -10.5 – 10.5 V DC full scale. It’s analog operating current range is 4 – 20 mA normal and -21 – 21 mA full scale. It converts the analog input up to the full-scale range. It enhances the functionality of MicroLogix 1200…