2013年5月23日星期四
TIGHT-BUFFERED CABLE
With tight-buffered cable designs, the buffering material is in direct contact with the fiber. This design is suited for "jumper cables" which connect outside plant cables to terminal equipment, and also for linking various devices in a premises network. Multi-fiber, tight-buffered cables often are used for intra-building, risers, general building and plenum applications.
The tight-buffered design provides a rugged cable structure to protect individual fibers during handling, routing and connectorization. Yarn strength members keep the tensile load away from the fiber.
As with loose-tube cables, optical specifications for tight-buffered cables also should include the maximum performance of all fibers over the operating temperature range and life of the cable.
Related:
UTStarcom launches PTN 735 packet-optical transport platform
UTStarcom Holdings Corp. (NASDAQ: UTSI) has expanded its NetRing TN line of packet-optical transport systems with the upgraded PTN 735.
The newly upgraded PTN 735 product offers unified loading capacity and improved processing capacity. The upgrade enhances the quality of service that customers can provide, while its improved design and smaller size helps improve profitability, UTStarcom asserts.
The company says it successfully completed a field trial of the PTN 735 with SOFTBANK BB Corp. in 2010, after which SOFTBANK deployed the platform throughout Japan.
UTStarcom has offered its NetRing TN Packet Transport Network (PTN) systems since 2006. The NetRing TN is based on the MPLS-TP.
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Multiwavelength optical networking
Multiwavelength optical networking (MONET), is a method for communicating digital information using lasers over optical fiber.
The method provides the next level of communication networks after SONET optical networks. MONET optical networks provide an even greater bandwidth capacity.
This new method employs Wave division multiplexing (WDM) technology for transporting large amounts of telephone and data traffic and allow for interoperability between equipment from different vendors.
First developed by the secretive National Security Agency as author James Bamford points out in his book, "Body of Secrets: Anatomy of the Ultra-Secret National Security Agency". It was also discussed at the 1996 Military Communications Conference.
Related:
http://geponsolution.blog.fc2.com/blog-entry-168.html
This new method employs Wave division multiplexing (WDM) technology for transporting large amounts of telephone and data traffic and allow for interoperability between equipment from different vendors.
First developed by the secretive National Security Agency as author James Bamford points out in his book, "Body of Secrets: Anatomy of the Ultra-Secret National Security Agency". It was also discussed at the 1996 Military Communications Conference.
Related:
http://geponsolution.blog.fc2.com/blog-entry-168.html
2013年5月21日星期二
The advantages of using fibre optics
Because of the Low loss, high bandwidth properties of fiber cable they can be used over greater distances than copper cables, in data networks this can be as much as 2km without the use of repeaters. Their light weight and small size also make them ideal for applications where running copper cables would be impractical, and by using multiplexors one fibre could replace hundreds of copper cables.
This is pretty impressive for a tiny glass filament, but the real benefits in the data industry are its immunity to Electro Magnetic Interference (EMI), and the fact that glass is not an electrical conductor. Because fibre is non-conductive, it can be used where electrical isolation is needed, for instance between buildings where copper cables would require cross bonding to eliminate differences in earth potentials. Fibres also pose no threat in dangerous environments such as chemical plants where a spark could trigger an explosion. Last but not least is the security aspect, it is very, very difficult to tap into a fibre cable to read the data signals.
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pci-e network card
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