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Messages - aman_diu

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Telecom Forum / Re: এবার জুনেই আইফোন ৫
« on: April 11, 2012, 05:26:07 PM »
sir, thanks for your information............

Telecom Forum / Re: History of telecommunication
« on: April 11, 2012, 05:20:18 PM »
welcome sir

Departments / Re: Success of ETE Dept. in National Arena
« on: March 27, 2012, 09:59:51 PM »
congratulation to Tasnia Tajrin

Telecom Forum / Telecommunications control software
« on: March 27, 2012, 06:34:40 PM »
Telecommunications control software is one of the five basic categories of network components that must be in place to successfully support telecommunication activities. The other five are: Terminals, Telecommunications Processors, Telecommunications channels and Computers.

The management and control of telecommunication activities and networks is a responsibility of telecommunications control software. Telecommunications control software can be in the form of many different components to include; telecommunication monitors, network management components, network operating systems for network servers, microcomputer Web browsers, etc. This software can reside on almost any component of the network and can provide such features as performance monitoring, activity monitoring, priority assigning, transmission error correction and network problem mitigation.

One of Telecommunications control software primary responsibilities is to perform network traffic management and monitoring operations. By managing network resources and circumventing possible congestion situations, this software can drastically improve service level satisfaction to users. The monitoring aspect that telecommunication control software can provide is crucial in being able to provide insight to administrators and users before a potential problem ever occurs.

With security being of great importance, telecommunications control software can be utilized to provide a network with various forms of network security defense implementation to include increased authentication and encryption which will prevent unauthorized system access and exploitation.

Other forms of telecommunications control software can provide insight into capacity planning efforts. Users can be surveyed to track system performance and reliability in an effort to gauge future considerations for potential upgrades and expansion.

In addition, Telecommunications control software can provide users with many functions and communication support services that can greatly enhance a users ability of conduct their work.

In the end, any software that provides the ability to perform telecommunication activities and sustainment operations can be considered telecommunications control software.

Telecom Forum / History of telecommunication
« on: March 27, 2012, 06:17:09 PM »
A very early experiment in electrical telegraphy was an 'electrochemical' telegraph created by the German physician, anatomist and inventor Samuel Thomas von Sömmering in 1809, based on an earlier, less robust design of 1804 by Catalan polymath and scientist Francisco Salvá i Campillo.[5] Both their designs employed multiple wires (up to 35) in order to visually represent almost all Latin letters and numerals. Thus, messages could be conveyed electrically up to a few kilometers (in von Sömmering's design), with each of the telegraph receiver's wires immersed in a separate glass tube of acid. An electrical current was sequentially applied by the sender through the various wires representing each digit of a message; at the recipient's end the currents electrolysed the acid in the tubes in sequence, releasing streams of hydrogen bubbles next to each associated letter or numeral. The telegraph receiver's operator would visually observe the bubbles and could then record the transmitted message, albeit at a very low baud rate.[5] The principal disadvantage to the system was its prohibitive cost, due to having to manufacture and string-up the multiple wire circuits it employed, as opposed to the single wire (with ground return) used by later telegraphs.

The first commercial electrical telegraph was constructed in England by Sir Charles Wheatstone and Sir William Fothergill Cooke. It used the deflection of needles to represent messages and started operating over twenty-one kilometres (thirteen miles) of the Great Western Railway on 9 April 1839. Both Wheatstone and Cooke viewed their device as "an improvement to the [existing] electromagnetic telegraph" not as a new device.

On the other side of the Atlantic Ocean, Samuel Morse independently developed a version of the electrical telegraph that he unsuccessfully demonstrated on 2 September 1837. Soon after he was joined by Alfred Vail who developed the register — a telegraph terminal that integrated a logging device for recording messages to paper tape. This was demonstrated successfully over three miles (five kilometres) on 6 January 1838 and eventually over forty miles (sixty-four kilometres) between Washington, DC and Baltimore on 24 May 1844. The patented invention proved lucrative and by 1851 telegraph lines in the United States spanned over 20,000 miles (32,000 kilometres).[6]

The first successful transatlantic telegraph cable was completed on 27 July 1866, allowing transatlantic telecommunication for the first time. Earlier transatlantic cables installed in 1857 and 1858 only operated for a few days or weeks before they failed.[7] The international use of the telegraph has sometimes been dubbed the "Victorian Internet".[8]

The electric telephone was invented in the 1870s, based on earlier work with harmonic (multi-signal) telegraphs. The first commercial telephone services were set up in 1878 and 1879 on both sides of the Atlantic in the cities of New Haven and London. Alexander Graham Bell held the master patent for the telephone that was needed for such services in both countries. The technology grew quickly from this point, with inter-city lines being built and telephone exchanges in every major city of the United States by the mid-1880s.[9][10][11] Despite this, transatlantic voice communication remained impossible for customers until January 7, 1927 when a connection was established using radio. However no cable connection existed until TAT-1 was inaugurated on September 25, 1956 providing 36 telephone circuits.[12]

In 1880, Bell and co-inventor Charles Sumner Tainter conducted the world's first wireless telephone call via modulated lightbeams projected by photophones. The scientific principles of their invention would not be utilized for several decades, when they were first deployed in military and fiber-optic communications.

*2#   for grameen phone user

Telecom Forum / Re: Send Free SMS online unlimited
« on: March 27, 2012, 05:46:20 PM »
thanks  a lot

for grameen phone user...........*2#

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