DSL
modem
fax
Communication channels.
MODEM (Modulator - Demodulator) allows communication between computers.Generally Modem connects to ISP over analog telephone line and further ISP connects to Computers over Internet.
communication media are the physical components through which the communication devices transmit data. e.g. cables, telephone lines, terminals.
modem
A device that makes connections within a telephone network by opening and closing electrical circuits is a switchboard. It enables communication by connecting different telephone lines together to establish a call between two parties. Switchboards were commonly used in early telephone systems before modern automated switching systems were developed.
Telephone is a device used to contact people in far distances. With the functions and features of modern phone system such as IP PBX , we are able to enjoy VoIP service, call forwarding, call screening and have total control over our communication lines through desktop call controller.
Using the telephone we are able talk to a person especially in long distances. Telephone lines are also used to transmit faxes and get connected to the internet - essential tool for communication.
fax machine ;)
they used carrier pigeons because they're telephone lines got destroyed from the gunfire.
Telecommunication Engineers are concerned with establishing communication by means of telephones, telegraphs, radar, radio, radio navigational aids, TV, and teleprinters. Important towns, cities, trade centers, harbors and ports are connected with underground cables or radio links. Countries and continents are brought closer by means of fast-emanating, information-carrying communication networks. All this has been made possible by the telecommunication engineer. Telecommunication engineers deal with line and wireless communication, or radio communication. Line communication is handled by telephone/telegraph engineers. The work comprises the installation, supervision, and maintenance of telephone exchanges and telephone lines. The radio communication engineer's work is concerned with the designing, installation, maintenance and periodical testing of broadcasting and telecasting systems and studios, and transmitting and receiving stations.