Chapter 2 *continues....

There are 3 types of transmissions timing :

• Synchronous transmission 
• Asynchronous transmission 
• Isochronous transmission 

Synchronous transmission

Data organised into blocks or groups and transferred at regular specified interval

Asynchronous transmission

the process where transmitted data is encoded with start and stop bits, specifying the beginning and

end of each character.

• Data sent without being synchronized 

Isochronous transmission

data is sent at the same time as other related data to support certain types of real time applications e.g streaming voice, video and music

There are 2 types of direction for data transmission:

• simplex
• duplex 
• half duplex
• full duplex

simplex --> it is one way communications only. Data travels in single direction 

 i.e door bell

• Relatively uncommon in computer

communications

duplex --> half duplex: Data can travel in either direction but only in one direction at a time.

• i.e USB devices 

             --> full duplex: Data can moves in both directions at the same time, such as with a telephones.     Ideal for hardware devices that need to pass large amount of data between each other.

• Many networks and most internet connections are full duplex

Chapter 2

Data Transmission 
How data was transmitted?
It can be transmit by :

– Analog vs digital
– Bandwidth
– Serials Vs Parallel
– Transmission timing
– Transmission directions
– Circuit switched, Packet‐Switched, and Broadcast Connections

Analog transmission uses signals that are exact replicas of a sound wave or image. Signals of varying frequency or amplitude are added to carrier waves with a given frequency of electromagnetic current to produce a continuous electric wave E.g standard phones, fax

machines, and modems.     

Digital transmission the signals are converted into a binary code, which consists of two elements. Digital format is ideal for electronic communication as the string of 1s and 0s can be transmitted by a series of "on/off" signals represented by pulses of electricity or light.

Bandwidth is equal to the amount of data that can be transmitted in a fixed amount of time. Usually, bandwidth is measured in bits per second (bps), Megabits per second (Mbps) and etc. Medium with higher bandwidth can deliver data faster.

Serial vs Parallel Transmission 

Serial Transmission

Serial transmission : data sent one bit at a time, one after another a long a single path

Parallel Transmission 

Parallel Transmission : data is sent at least one byte at a time, each bit in the byte taking separate path

Chapter 1

Procrastination =( 
Of course procrastination never give benefit except troubles. Yup. So, this was what I learnt through my first week in Telecommunication class. Let me briefly describe what was in the introduction of this subject.

What is COMMUNICATION?

the imparting, conveying or exchange of thoughts,

messages, ideas, knowledge or information by

sign and sounds like speech, signals, writing or by behaviour. 

ex:

There are many communication that was found by researchers, but we only learnt one model which is Shannon-Weaver Mathematical Model, 1949.

Below is on of the popular model for communication, by Schramm.

What is TELECOMMUNICATION?
tele= far off
telecommunication means transfer of data from transmitter to receiver across a distance.


 There are 6 elements to make communication occurs: 
1. people: as users
2. procedure :order set of task
3. data/information 
4. hardware : equipment/ device
5. software : program
6. communication/ connectivity  :transmission of data

Hey Guys & Gurls

Hello! we meet again. I saw all the new blog created by my classmate, and I am the lamest one. I've got to admit that i am not good in this bloggy thingy, BUT, i will try my best shot to make it ALIVE~




Now, i am learning on how to make my account more,, errmmmm,, interesting? Yeah! More interesting and fascinating. And first, I have to give a HUMONGOUS THANKS to Mira Mustafar. She showed me some tricks (or steps) on how to change all the settings etc etc etc.


Okay, lets talk about technology. World nowadays are made up of zillions of technology. You know, like computers, telephone, TV and etc. Even now, people could bring television along with them. What a shock right. Other interesting part is when a 5 years old boy is more advance than the teenagers especially when it comes on technology. 
 @.@

BUT, nothing to shame about. That is why I'm taking Telecomunication & Networking as one of my subjects. At least, it can help me to figure out more  on what is technology all about. *wink2

Welcome, Me..

Nothing special to shared. I am just a simple person. Now, I am trying my best on creating a blog. Hopefully, I manage to finish it in a very short time.