Telephone networkwikipedia
A telephone network is a telecommunications network used for telephone calls between two or more parties.
telephone networkNetwork engineeringtelephonenetworkstelephone infrastructuretelephony networkfixed and mobile networks

Telephone call

telephone callcallphone call
A telephone network is a telecommunications network used for telephone calls between two or more parties.
A telephone call is a connection over a telephone network between the called party and the calling party.

Telecommunications network

networktelecommunications networkcommunication network
A telephone network is a telecommunications network used for telephone calls between two or more parties.

Integrated Services Digital Network

ISDNintegrated services digital network ISDN
ISDN is a circuit-switched telephone network system, which also provides access to packet switched networks, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in potentially better voice quality than an analog phone can provide.

Lawful interception

lawful interceptionlawful interceptInterception
Lawful interception (LI) refers to the facilities in telecommunications and telephone networks that allow law enforcement agencies with court order or other legal authorization to selectively wiretap individual subscribers.

12-channel carrier system

12-channel carrier system12 channel carriercarrier systems
In the U.S. telephone network, the 12-channel carrier system was an early frequency-division multiplexing system standard, used to carry multiple telephone calls on a single twisted pair of wires, mostly for short to medium distances.

Defense Red Switch Network

The Defense Red Switch Network (DRSN) is a dedicated telephone network which provides global secure communication services for the command and control structure of the United States Armed Forces.

SORM

System of Operational-Investigatory Measures (SORM)SORM''' and '''SORM-2SORM-II
SORM is the technical specification for lawful interception interfaces of telecommunications and telephone networks operating in Russia.

Cordless telephone

cordless telephonecordless phonecordless phones
The base station is connected to the telephone network through a telephone line as a corded telephone is, and also serves as a charger to charge the handset's batteries.

Electronic music

electronicelectronic musicelectronic musician
It achieved viable public interest and made commercial progress into streaming music through telephone networks.

Waveguide filter

waveguide filterwaveguide cavity filtersfilters
Examples of microwave filter use are found in satellite communications, telephone networks, and television broadcasting.

Flood search routing

flood search routing
In a telephone network, flood search routing is non-deterministic routing in which a dialed number received at a switch is transmitted to all switches, i.e., flooded, in the area code directly connected to that switch; if the dialed number is not an affiliated subscriber at that switch, the number is then retransmitted to all directly connected switches, and then routed through the switch that has the dialed number corresponding to the particular user end instrument affiliated with it.

Telephony application server

Signaling Server
The term telephony application server refers to an entity in a telephone network that carries out functions that are not directly related to the routing of messages through the network.

Teletraffic engineering

traffic engineeringteletraffic engineeringtraffic
Teletraffic engineers use their knowledge of statistics including queuing theory, the nature of traffic, their practical models, their measurements and simulations to make predictions and to plan telecommunication networks such as a telephone network or the Internet.

Overlay network

overlay networkoverlayoverlay multicast
The Internet was originally built as an overlay upon the telephone network, while today (through the advent of VoIP), the telephone network is increasingly turning into an overlay network built on top of the Internet.

Information and communications technology

ICTinformation and communications technologyinformation and communication technologies
The term ICT is also used to refer to the convergence of audio-visual and telephone networks with computer networks through a single cabling or link system.

Plain old telephone service

POTSplain old telephone serviceLocal Telephone Service
POTS remains the basic form of residential and small business service connection to the telephone network in many parts of the world.

Commercial bandwidth

commercial bandwidth
Commercial bandwidth is a term for the regular capacity of the telephone network required for intelligible speech.

A Journey in Other Worlds

It contains abundant speculation about technological invention, including descriptions of a worldwide telephone network, solar power, air travel, space travel to the planets Saturn and Jupiter, and terraforming engineering projects — damming the Arctic Ocean, and adjusting the Earth's axial tilt (by the Terrestrial Axis Straightening Company).

Base station

base stationbase stationsradio base station
In mobile telephony, it provides the connection between mobile phones and the wider telephone network.

Circuit switching

circuit switchedcircuit-switchedcircuit switching
The defining example of a circuit-switched network is the early analog telephone network.

National Defence Radio Establishment

National Defence Radio EstablishmentFRANlegislative change
In 1940, when Germany occupied Denmark and Norway, the German Wehrmacht requested to use the Swedish telephone network for its communication.

Distributed switching

distributed switchingremote switch
Distributed switching is often used in telephone networks, though it is often called host-remote switching.

Psychoacoustics

psychoacousticspsychoacousticpsychoacoustic model
Telephone networks and audio noise reduction systems make use of this fact by nonlinearly compressing data samples before transmission, and then expanding them for playback.

Russian Railway Troops

railway troopsSoviet Railroad TroopsRailway Troops of the Russian Federation
During World War I, the personnel of the units and was built about 300 kilometers broad gauge railway and up to 4000 km of narrow gauge, restored more than 4,600 miles of track and nearly 5000 miles of telephone and telegraph lines, railway tracks.