XDSL AND CABLE MODEM

XDSL and Cable Modem

Use of xDSL modems

In recent months, with corporate users and operators of the relationship, a need regularly arises for high-speed digital transmission channel disk imaging. However in a remarkable way, the deployment of digital communications is one fairly solid barrier i.e. decayed cabling infrastructure. Becoming available, cables were laid many years ago, as if mildly, not one of the best options for transferring them to digital streams with the highest speeds. That's according to the root causes of enthusiasm for the xDSL-modem into the recent era increases every day.

One of the devices comply with these claims is readily available at cost, and is a product of Swiss company Schmid Telecommunications - Modem Series Watson4. Few devices in this series have been used in the plans produced by the network department of the company.

Each modem is equipped with a communication port RS-232C terminal, for inclusion in companies with a terminal emulator. Ration system allows you to steer the abundance characteristics of the modem, with a terminal primary (Master) modem to change the characteristics of the remote modem (Slave) (Joseph, 2001).

Integrated diagnostics property transfer information, and allows you to view the status of the band and energy characteristics of the band, including transmitter power, the tightening of the receiver, the excess of signal above the din. It is likely analogous to interpret the transmission quality of audio books on the standard ITU-T G.826. Consistent with this stereotype is held cumulative statistics on working time, scarcity of bandwidths, the number of bad packets, the time during which there were shortages, etc.

Copper wire communication lines are available in every apartment and every house, but they are used either for analog telephone connection with a bandwidth of 4 kHz, or for connecting ISDN lines at speed of 144 kbps. Communication standard xDSL speeds up data several times. High-speed multimedia services and Internet / intranet using xDSL become accessible to all (Lee, 2007).

What is meant by the term xDSL?

Digital Subscriber Line (DSL or xDSL) is a symbol of the modern method of data transmission over the copper wire lines. This method is used to provide advanced multimedia and telephony services to every office and in each apartment. Depending on the application, DSL indicates differently.

The first application of DSL got on the telecommunications market. It's HDSL (High speed DSL, or high speed DSL), used for the primary phone connection. Usage of HDSL over two or three copper pairs can transmit information at speed of 2 Mbps. Swiss group Ascom, actively participated in the development of the standard HDSL and is considered a pioneer in this field.

However, today, by using a modem COLT Soho from Ascom, you can implement connection with a transfer rate of 2 Mbit/s over a single copper pair. This method is known as SHDSL or SDSL (Burstein, 2002).

Better known today, it has a method of ADSL (Asymmetrical DSL - Asymmetric DSL), which was developed for using Video on Demand ...