31-03-2012, 12:45 PM
TELECOMMUNICATION
INTRODUCTION TO TELECOMMUNICATION.docx (Size: 1.25 MB / Downloads: 65)
The word telecommunication made up of two words, tele and communication.Tele meaning distant and Communication in Latin meaning connection. Teleommunication is transmission, emission, or reception of voice and/or data through any medium by wire, radio, other electrical electromagnetic or optical means. Telecommunications includes all aspects of transmitting information.Thus Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphor telegraphs, signal flags.In the modern age of electricity and electronics, telecommunications now also includes the use of electrical devices such as telegraphs, telephones, and teleprinters.
CONCEPTS IN TELECOMMUNICATION
One way and interactive communication:-One way communication is that in which information is always transferred in only one preassigned direction.This communication is not necessarily constrained to one transmission path.Examples of one- way communications systems include broadcast stations, one-way intercom systems, and wireline news services.Interactive communication is an exchange of ideas where both participants, whether human, machine or art form, are active and can have an effect on one another. It is a dynamic, two-way flow of information.
Analog and digital communication:-
Analog Communication is a data transmitting technique in a format that utilizes continuous signals to transmit data including voice, image, video, electrons etc.An analog signal is a variable signal continuous in both time and amplitude which is generally carried by use of modulation. Once the data has arrived at the receiving end, it is converted back into digital form so that it can be processed by the receiving computer.Digital communication is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.
Circuit switching and packet switching:-
Circuit switching is a telecommunications technology by which two network nodes establish a dedicated communications channel (circuit) before the nodes may communicate. The circuit remains connected for the duration of the communication session.
IN-BAND VERSUS OUT-OF-BAND:-
Out-of-band signaling is telecommunication signaling on a channel that is dedicated for the purpose and separate from the channels used for the telephone call. Out-of-band signaling is used inSignaling System 7 (SS7).
PRIMARY FUNCTIONS:-
Core networks typically providing the following functionality:
1. Aggregation: The highest level of aggregation in a service provider network. The next level in the hierarchy under the core nodes is the distribution networks and then the edge networks. Customer Premise Equipment (CPE) do not normally connect to the core networks of a large service provider.
2. Authentication: The function to decide whether the user requesting a service from the telecom network is authorized to do so within this network or not.
INTRODUCTION TO TELECOMMUNICATION.docx (Size: 1.25 MB / Downloads: 65)
The word telecommunication made up of two words, tele and communication.Tele meaning distant and Communication in Latin meaning connection. Teleommunication is transmission, emission, or reception of voice and/or data through any medium by wire, radio, other electrical electromagnetic or optical means. Telecommunications includes all aspects of transmitting information.Thus Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphor telegraphs, signal flags.In the modern age of electricity and electronics, telecommunications now also includes the use of electrical devices such as telegraphs, telephones, and teleprinters.
CONCEPTS IN TELECOMMUNICATION
One way and interactive communication:-One way communication is that in which information is always transferred in only one preassigned direction.This communication is not necessarily constrained to one transmission path.Examples of one- way communications systems include broadcast stations, one-way intercom systems, and wireline news services.Interactive communication is an exchange of ideas where both participants, whether human, machine or art form, are active and can have an effect on one another. It is a dynamic, two-way flow of information.
Analog and digital communication:-
Analog Communication is a data transmitting technique in a format that utilizes continuous signals to transmit data including voice, image, video, electrons etc.An analog signal is a variable signal continuous in both time and amplitude which is generally carried by use of modulation. Once the data has arrived at the receiving end, it is converted back into digital form so that it can be processed by the receiving computer.Digital communication is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.
Circuit switching and packet switching:-
Circuit switching is a telecommunications technology by which two network nodes establish a dedicated communications channel (circuit) before the nodes may communicate. The circuit remains connected for the duration of the communication session.
IN-BAND VERSUS OUT-OF-BAND:-
Out-of-band signaling is telecommunication signaling on a channel that is dedicated for the purpose and separate from the channels used for the telephone call. Out-of-band signaling is used inSignaling System 7 (SS7).
PRIMARY FUNCTIONS:-
Core networks typically providing the following functionality:
1. Aggregation: The highest level of aggregation in a service provider network. The next level in the hierarchy under the core nodes is the distribution networks and then the edge networks. Customer Premise Equipment (CPE) do not normally connect to the core networks of a large service provider.
2. Authentication: The function to decide whether the user requesting a service from the telecom network is authorized to do so within this network or not.