2010fall ch7 zolboo
DESCRIPTION
J.EL310TRANSCRIPT
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Outsite plant
J.TC08D001 E. UuriintsolmonJ.TC08D003 Ts. BuyanbatJ.TC08D706 G. Zolboo
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1. Outside Plant Technology 2.Protection3.Outside Plant Application
Issues
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1. Outside Plant Technology
• Supporting Structures • Cable Characteristics • Underground cable • Feeder and distribution cable
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What is outside plant technology ?
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Supporting structure
Cable is classified according to its supporting structure:
Aerial cable supported on pole lines Underground cable enclosed in
buried conduit Buried cable placed directly in the
ground
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Cable characteristics
Twisted pair cables Cable sheath
materials Cable pairs
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OLD NEW
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Underground cable
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Feeder and distribution cable
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2.Protection
• Electrical Protection • Protection Methods • Digital Loop Carrier (DLC)
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Electrical protection
Prevent injury Prevent damage
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Zone of protection
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Protection methods
Methods: Insulating telecommunications apparatus Shielding communications cables Grounding equipment Opening affected circuits Separating electrical and
telecommunications circuit
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Insulating Telecommunications Apparatus
Insulation. Satisfy electrical protection
requirements Conductor of from 1000 to 4000 V
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Shielding Communications Cables
Lightning strikes A grounded shield wire buried above a communications
cable Separation to prevent arcing
between the shield and the cable.
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Grounding Equipment
Principle of electrical protection Simplest form protector One side of the carbon block
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Opening Affected Circuits
Method of protecting circuits and equipment
The communications conductors
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Separating Electrical and Telecommunications Circuits
The minimum acceptable separation between power and telecommunications circuits .
Additional measure Sharing of a joint trench
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3.Outside Plant Application Issues
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Outside plant application issues
Including plans for both fiber and copper cable.
Depends on the number of stations. Flexible conduit can be plowed
underground.
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Conclusion
Last of all Outside plant is the collection of cables, poles,
conduit, and fiber optics that interconnect central offices and connect the
central office to the subscribers’ premises. Wide-bandwidth signals travel across the country
in ribbons of fiber-optic cable, but must be converted to analog and piped to the customer over a pair of wires that may cut off any frequency higher than 4kHz.
When we prepared this presentation we learned about how outside plant is designed and constructed.
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Reference
The Irwin Handbook of Telecommunications
Lecture of optic lesson www.google.com
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Thank you for your attention!