AT & T Systimax PDS (the Premises Distribution System) integrated wiring system to a single wiring system combines the entire communication, including voice, data, images, and monitoring equipment wiring.
PDS International standardsAT & T PDS structured cabling system components are used in Bell Labs, according to the American Electronics Industry Association and Telecommunications Industry Association standards at the factory through a test conducted according to these criteria, the main criteria:
The EIA/TIA-568 civil cable standards
EIA/TIA-569 civil communication channel and space standards
· IEEE 802.3 bus Ethernet LAN standard
LAN standard of IEEE 802.5 loop
High-speed LAN standard, ANSI FDDI Fiber Distributed Data Interface
· TPDDI copper distributed data interface high-speed LAN standards
· ATM ATM standards
· The RS232 RS422 asynchronous and synchronous transmission standard
· The PDS composition
PDS data and voice communications, to meet the needs of computer local area network LAN and program-controlled switchboard PBX. Connected to the computer and network equipment, telephones and fax machines connected to the telephone switchboard. PDS follow the physical topology of the telephone system, the star of structured cabling, data and telephone wiring structure is consistent with the high reliability of this structure, a node changes do not affect other nodes, the simple structure, easy to extend, easy maintenance, good reliability. PDS structure diagram is as follows:
The PDS is mainly composed of the following six parts
Equipment Room subsystem:
Mainly refers to the network equipment room of the telephone exchange room of voice systems and data systems. This subsystem is mainly composed of patch panels and cable to connect patch panels and equipment.
Patch panel subsystem: In addition to the outdoor equipment, all floor patch panel.
Vertical trunk subsystems: the vertical direction of the cable to form the floors and external communication channels.
The level of trunk subsystem: usually use unshielded twisted pair (UTP), the vertical trunk extended to the user workspace, in need of high-speed applications, the level of trunk can be fiber optic cable.
The work area subsystem: from the information outlet and connect to the connection of user equipment.
Buildings subsystems: the cable in a building extends to the other buildings, including cable, fiber optic and electrical protective equipment.
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