Author: Salman Ahmed

PDH Plesiochronous Digital Hierarchy

Posted on March 7, 2017 by | 7 Comments
PDH Plesiochronous Digital Hierarchy PCM Pulse code modulation is the basic block for PDH SDH and SONET. Sampling frequency must be twice the higher frequency component of the signal. Voice frequency sampling rate 8KHz (0.3 to 3.4 KHz = 4KHz). Each…
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Ethernet

Posted on March 4, 2017 by | 0 Comments
Dailymotion Ethernet Introduction Ethernet is the name of LAN standard defined by IEEE 802.3. It was basically introduced as a LAN technology.With the introduction of Gb Ethernet. Now It is MAN and WAN standard. It is data link layer Protocol.…
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ITS Intelligent Transport System

Posted on February 27, 2017 by | 2 Comments
Dailymotion Intelligent Transport System ITS. An intelligent Transport system is an application of technology. ITS is the integration of communication technology and computation devices. It provides important information, security, safety, and efficiency. It links people, Road, and vehicles. Conventional Transport system.…
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Line Coding

Posted on February 24, 2017 by | 0 Comments
Line Coding Line coding a technique to convert digital data into a digital signal.In our last video Pulse Code Modulation, we learn that how to convert any analog signal into digital bits.Now if we want to send these bit over a…
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PCM Pulse Code Modulation

Posted on February 23, 2017 by | 5 Comments
Pulse Code Modulation PCM Pulse code modulation is a technique, which is used to convert an analog signal into digital signal. PCM is the preferred method of communication within the public switched telephone network (PSTN). It is an old but widely…
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RAM Random Access Memory

Posted on February 21, 2017 by | 0 Comments
RAM Random Access Memory It is a type of memory and store data. A processor can access its individual memory cell in any sequence. It is: Volatile memory. Temporary memory. Primary memory. We have already discussed volatile, temporary memory and primary…
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Ubiquitous computing

Posted on February 17, 2017 by | 1 Comment
Ubiquitous Computing. This concept is not new but now it is getting famous.It is taking us in the world of automation.Before getting its concept, you need to clear that What is a computer? Here we will discuss the basic definition of the computer.…
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Posted on February 6, 2017 by | 0 Comments
Number System The number system is a method to count or calculate something.In our daily life, we are using the different type of number system.The most common number system is decimal number system.Some number systems are the octal number system,…
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T1 and E1 Lines

Posted on January 30, 2017 by | 0 Comments
E1 and T1 Lines E1 and T1 standards are basically introduced for voice communication. Both are using TDM for frame formation. In this video, we will discuss the digital transmission advantages and disadvantages. Basic concept about Modulation, Multiplexing, and PCM is…
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Microsoft Excel Video # 10

Posted on January 25, 2017 by |
Microsoft Excel Now Microsoft Excel video # 10 is in front of you.In this video, I m going to discuss multiple small formulas. Sumif Averageif Countif Index Match Choose Hlookup All these are small formulas but very important for your…
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