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Public switched networks (psn)
| Fiber Optic Glossary |
1. any common carrier network that provides circuit switching among public users. 2. a switched network accessible to the public for originating and terminating telecommunications messages. 3. any common carrier switched network, whether by wire or radio, including local exchange carriers, interexchange carriers, and mobile service providers, that use the north american numbering plan in common with provision of switched services.
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Accessible, английский
A place which can be approached by land or sea.
Terminating, английский
Terminating a fiber is accomplished through preparing the fiber for connection to another fiber or device such as a connector. the goal when terminating is to produce a perfect end to the fiber. the end should be cleanly cut, clear and physically connected to the receiving optical device. this can be accomplished through two means; permanently joining the fibers by welding or gluing the ends of the fiber together, or mechanically aligning the fibers and joining them with transparent gel.
Telecommunications, английский
- Передача и прием электромагнитных сигналов или любой информации по проводам, радио- и другим каналам
- (радио) связь; средства (дальней) связи
- Communicating over a distance. use of wire, radio, optical or other electromagnetic channels to transmit or receive signals for voice, video and data communications.
- The transmission and reception of signals (such as electrical or optical) by wire, optical fiber, or electromagnetic means. telegraphing, show-through on a decorative material covering a wall, etc., irregularities, imperfections, or patterns of an inner layer which are transmitted to the surface so that they become visible.
- Communicating by sending voice, data or images over networks that might involve telephone lines, satellites, and the radio spectrum. see telecommunications network.
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Long-haul telecommunications, английский
1. in public switched networks, regarding circuits that span long distances, such as the circuits in inter-lana, interstate, and international communications. 2. in military use, communications among users on a national or worldwide basis. long-haul communications are characterized by a higher level of users, more rigorous performance requirements, longer distances between users, including world wide distances, higher traffic volumes and densities, larger switches and trunk cross sections, and fixed and recoverable assets. usually pertains to the u.s. defense communications system.
Crosstalk (xt), английский
1) undesired coupling from one circuit, part of a circuit, or channel to another. 2) any phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates and undesired effect in another circuit or channel.
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