Network and cloud services provider Cbeyond
Week News Abstract For Fiber Series in 10GTEK
The abstract is mainly about the optical communication related products,including: SFP,QSFP,FTTH,GPON,EPON,SFPPLC,PTN,ODN,Sfp Transceiver,Optic Transceiver,Optical module,Optical devices,optical communications,Optical transceiver module,Etc.
GCbeyond extends reach via FiberLight, Zayo
Network and cloud services provider Cbeyond (NASDAQ: CBEY) has announced partnerships with a pair of fiber services vendors to extend its coverage footprint. The partnerships with FiberLight and Zayo aim to help Cbeyond reach its goals of lighting 1,000 buildings by the end of 2013 and transitioning an additional 28 percent of its access customers to Metro Ethernet in the same time frame.Currently, Cbeyond provides 22 percent of its customers with Metro Ethernet via Ethernet-over-Copper technology. To date, Cbeyond has placed orders for fiber to reach more than 600 buildings within the company's densest markets."Our primary goal for 2012 is to deliver a secure cloud infrastructure, network, and consultative sales approach to bring the real benefits of secure cloud computing to the most technically demanding small and medium-sized businesses nationwide," said Brent Cobb, chief customer officer for Cbeyond."Our association with a high-quality growth company like Cbeyond, recently named one of Forbes' most trustworthy companies of 2012, further illustrates the value of FiberLight's flexible service offering," said Ben Edmond, president of sales and marketing of FiberLight. "Our ability to meet the needs of Cbeyond for dark fiber provides not only a potential cost savings opportunity associated with owner economics, but also supports its strategy for delivering Cbeyond 2.0 services, enabling more bandwidth and the key applications consuming that bandwidth, within the small to medium sized business market.""We are excited to partner with Cbeyond to bring dark fiber connectively to small and medium-sized businesses across the U.S.," said Matt Erickson, president of Zayo Fiber Solutions. "We anticipate this partnership will be beneficial for both organizations as we have the joint goal of bringing fiber to buildings across the U.S."
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Salt and sea water blocking for ‘totally dry’ terrestrial optical cables
Over the last decade many optical cable producers have promoted the use of so called dry blocked cables for outdoor use. These cable designs bypass oils, gels, and/or other flooding compounds and instead use super absorbent powder (SAP) infused into thread or other cable elements to protect against intrusion of water. In the presence of water, SAP expands (see Figure 1), filling possible water pathways and preventing water intrusion. Such dry blocking technology is often used under the cable jacket, under metal armor, around buffer tubes, and even inside buffer tubes in direct contact with optical fibers. Cables that totally eliminate gels or glues in favor of dry blocking technology are sometimes referred to as “totally dry” fiber-optic cables. Super+absorbent+powder+%28SAP%29+infused+into+thread%2C+before+and+after+exposure+to+water SAP technology has several advantages, but one major drawback: In the presence of salt typical commercially available SAP chemistries suffer greatly reduced water blocking performance. For this reason a number of network operators have opted not to deploy such cables, or to only deploy dry cables in applications where there is no chance of contact with salt/sea water.However, a new way of measuring the effectiveness of dry cable technology may provide better insight into how SAP-enabled dry cables perform in the presence of salt water and open the door to spreading the benefits of dry cables to more applications.SAP basics SAP is typically infused by different means onto polyester, aramid, or fiberglass threads, yarns, or tapes that are then used in the basic construction of the optical cable. This type of dual-purpose use can combine water-blocking technology with cable strength materials, aiding in cable design and reducing cable weight and cost.The primary advantage of dry cables versus traditional gel-filled cables is the reduced time and expense of cable cleanup during preparation for connection and/or fiber splicing. The use of dry cables avoids the labor necessary to remove gel and oil from each fiber in a buffer tube, or from optical ribbons in the case of ribbon-style cables. In one published study a 432-fiber dry cable preparation saved around 1 hour per cable end.1 The study considered that over a 20-km route using ten 2-km-length 432-fiber cables, a total of 20 preparation ends would be required. The study concluded the installation crew would save 23 crew hours for the route.According to an estimate from the FTTH Council, labor is the single most expensive element of FTTH deployment, comprising 46% of the total installation cost.2 So any labor time savings can offer a significant benefit to those paying for cable installation.Secondary advantages of dry cables can include:Elimination of the need to purchase solvents and wipes to remove gel and oil Tools, cabinets, and closures stay cleaner without exposure to gels and oils Dry cables are in general lighter in weight than gel-filled cables. This has the added advantages of making the cables easier to handle and adds less load onto aerial infrastructure.Too much salt Despite these advantages, the problems SAP encounters with salt water has limited the use of dry cables. An informal poll in Q2 2011 of three major U.S. fiber-optic cable companies revealed that perhaps 40% of the U.S. optical cable market comprises dry cable, while about 60% of customers still purchase gel-filled cables.SAP’s salt problems don’t end with absolute water absorption. The speed with which the SAP absorbs water is greatly reduced as well. This latter point is also very important in that if SAP reacts too slowly, water may penetrate far inside a cable before absorption occurs. SAP technologies have an inherent “delay” in absorbing once initial contact with water is made. So, it is important to specify not only how much water a dry technology can absorb, but perhaps more importantly how quickly the technology reacts to block water.
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The case for field-terminated mechanical connectivity
The drop cable connection serves as a key component in fiber-to-the-home (FTTH) networks. Reliable broadband service depends upon subscriber drops that are stable, efficiently installed, operationally flexible, and affordable. Due to these often contradictory objectives, finding the right connectivity approach for a particular deployment situation can prove to be a daunting task.Deciding between field-terminated and factory-terminated products is one of the initial choices providers must make before deployment begins. Both alternatives have their pros and cons. Initial capital costs, inventory costs, reliability, deployment speed, cable management, and deployment environment must be considered when identifying the better option.Over the last several years, the industry has trended away from field termination in favor of factory-terminated products. Factory termination is generally believed to produce a higher performing, more reliable connection than field-terminated connections. The controlled factory termination ensures more consistent end-face geometry, resulting in low insertion loss and attenuation. Factory termination also keeps labor costs low by reducing installation and technician training time compared to field termination.Conversely, some providers have continued to opt for field-termination methods due to its flexibility and economy. Using factory-terminated products requires an inventory of varying lengths of patch cords for different installation scenarios, whereas field termination uses less expensive bulk cable, which is cut to length on-site. Field termination also eliminates the need to devise slack cable management systems for each installed home – a necessity when using pre-determined lengths of factory-terminated patch cords. And, with factory-terminated products, technicians run the risk of being caught in the field without the proper length of patch cord, causing installation delays and adding to labor costs.Service providers choosing field-terminated methods of connectivity must then choose between fusion and mechanical splicing. Until recently, the choice was clear. Fusion splicing has been the de facto standard for fiber feeder and distribution construction projects, so the new handheld fusion splicers are considered to be a viable approach for FTTH drop splicing.However, the initial capital expenditures, maintenance costs, and installation speed of fusion splicing hinder its status as the preferred option. In comparison to mechanical splicing, fusion splicing is expensive. Fusion splicing machines sell for thousands of dollars each, requiring a heavy investment to equip each technician in the field. Additionally, the machines require electrical power, such as a battery, which can deplete of charge in the field, adding time and cost to the process. Moreover, fusion splicing can be time-consuming and requires specially trained technicians, further increasing costs.The market has responded by developing a broader array of less costly options that offer the same level of reliability as fusion splicing. These options include improved mechanical splicing technology and a new splice-less, gel-free connector.
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The above information is edited by 10GTEK.
10GTEK TRANSCEIVERS CO., LTD (Hereinafter refered to as 10GTEK) is specialized in developing and manufacturing Fiber Optical Transceivers and High Performance Cables which are wildly applied in Datacom, Telecom and CATV, providing customers with top quality and cost effective products. Our High Speed Cables cover Passive SFP+ Cable, Active SFP+ Cable, QSFP+ cables, MiniSAS (SFF-8088) Cables, CX4 Cables, Harness cables, Breakout Cables, Patchcords. We also manufacture Fiber Optic Transceivers like 10G XFP, 10G SFP+, SFP DWDM/ CWDM, GBIC, etc. The prompt response and excellent customer support contribute to clients‘ full satisfaction.Today, 10GTEK has been growing fast in the optical field for its unique and competitve excellence which has got a high attention from datacom and telecom.
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