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Sunday, September 8, 2013

the optical property of XFP is only slightly after

XFP modules are hot-swappable and protocol- independent. 2. They typically operate at optical wavelengths (colors) of 850 nm, 1310 nm or 1550 nm. 3. Principal applications include 10 Gigabit Ethernet, 10 Gbit /s Fibre Channel, Synchronous optical networking (SONET) at OC-192 rates, Synchronous optical networking STM-64, 10 Gbit /s Optical Transport Network (OTN) OTU-2, and parallel optics links. 4. They can operate over a single wavelength or use dense wavelength-division multiplexing techniques. 5. They include digital diagnostics that provide XFP solution management that were added to the SFF-8472 standard. 6. XFP modules use an LC fiber connector type to achieve high density.

At the same time, Menara Networks has implemented the optical transmission network (OTN) of ITU-T in the XFP application in the form of specific integrated circuit (ASIC). OTN used in adding optical performance monitoring function and transmitting error correction, at the same time, for signal transmission package. Through the integration of OTN in the plug-in package, package, the functions of signal package, achievable rate and optical signal management can be added to the IP routers and carrier Ethernet switch routers. This design has several advantages: the C-Band tunable elimination of the needs of using additional 10 Gbps transponder to transmit switch or router signal (for DWDM transmission), and allows system suppliers to develop universal card without support OTN. But the biggest technical problem for Menara is the development of the included software rather than the development of OTN ASIC.

Friday, September 6, 2013

using the Mini SAS plugs that to SATA cables

I really consider buying this server, but hasn't found any proper review before now. Is it possible to use regular consumer SATA drives in this box, or is HP LFF the only one that fits? It's hard to tell with the tiny depth of field in the image. And which chipset is used? I found a page claiming the NB to be AMD 785E, but I haven't been able to figure out the SB. I guess it is either SB700 or SB710. Or maybe the server-series (SP5100)? Is the mini-SAS plug driven by the SB or an additional controller? Would you say the airflow through the hard drive bay is sufficient? I think the drives seems pretty tightly stacked, or am I wrong? Just one character within the SAS information concept

The 3805 is actually an SAS controller, using the Mini SAS SFF-8087 plugs that handle four drives each. On the web site the specification says that the board comes with a pair of mini-SAS to SATA cables, but there were no such cables in my box. Turns out I had ordered the OEM version of the board (the only one available), and it had no cables in it - which makes sense, its an OEM board, the OEM is always going to want to do something unique with the per controller board.Fine, I'll order my own cables. But NOBODY has stock on mini-SAS cables. I flip out at the supplier, and he calls Adaptec, and they offer to give me a pair of cables for free (which was mighty nice of them), if I'll pay the shipping. Totally worth it, I had ordered the wrong product and they were willing to fix it. A FedEx overnight shipment later, I had cables.

Thursday, September 5, 2013

bundle of cables before the traffic through those cables is affected

The most widely recognized standards for network cabling have been published by the Telecommunications Industry Association and Electronics Industries Alliance (TIA/EIA). Unfortunately, those standards don’t specify the physical method to secure cables, but it’s generally understood that if you tie cables too tight, the cable’s geometry will be affected, possibly Twinax cables deforming the copper, modifying the twisted pairs or otherwise physically causing performance degradation. This understanding begs the question of whether zip ties are inherently inferior to hook & loop ties for network cabling applications.The first myth (that zip ties can negatively impact network performance) is entirely valid, but its significance is much greater in theory than it is in practice. While I couldn’t track down any scientific experiments that demonstrate the maximum tension a cable tie can exert on a bundle of cables before high quality the traffic through those cables is affected, I have a good amount of empirical evidence to fall back on from SoftLayer data centers. Since 2006, SoftLayer has installed more than 400,000 patch cables in data centers around the world (using zip ties), and we’ve *never* encountered a fault in a network cable that was the result of a zip tie being over-tightened … And we’re not shy about tightening those ties.

Wednesday, September 4, 2013

allow us to tighten our cables bundles easily so those bundles

Yesterday we did a cable pull. As an instrumentation worker this is probably as bad and as dirty as it gets. Most cables we pull are 18 gauge single pair. That means there is one black wire, one white wire, and a shield or ground cable. This is enclosed in a grey armored jacket. I’ve been involved in lots of those cables being pulled – not because I’m an apprentice but because it’s part of the job. The XFP to SFP+ cables we had to pull today were 2 – 18 gauge 24 pair cables. So inside the Grey cable there are 24 white wires, 24 black wires, 24 shield cables, and a ground for the entire cable as well.On this month’s Cable Talk, we discuss which cable components are critical and what the effects are of temperature fluctuations on sub-standard cables. We demonstrate how cable design, insulation and cable jacket materials collectively determine how effective a cable is in a  fast changing environment.As you might have observed in the “Cabling a Data Center Rack” video, SoftLayer uses nylon zip ties when we bundle and secure the network cables on our data center server racks. The decision to Negotiable use zip ties rather than hook & loop ties was made during SoftLayer’s infancy. Our team had a vision for an automated data center that wouldn’t require much server/cable movement after a rack is installed, and zip ties were much stronger and more “permanent” than hook & loop ties. Zip ties allow us to tighten our cable bundles easily so those bundles are more structurally solid (and prettier). In short, zip ties were better for SoftLayer data centers than hook & loop ties.

Tuesday, September 3, 2013

fanout cable assembly is the first for QSFP+ Cable applications

A fiber fanout cable assembly supporting the interoperability of 40 Gigabit Ethernet switch ports and 10 GbE server ports is now available from the 3M Electronic Solutions Division. The first-of-its-kind, 3M Active Optical Cable  Assembly for QSFP+ Cable FDR DAC to SFP+ Applications incorporates industry-leading VCSEL and 3M light-engine technologies to deliver exceptional cost and performance value for data centers and high-performance computing (HPC) clusters.The QSFP+ Cable consist of a cable assembly terminated with QSFP+ transceivers on either end. If you use the QSFP+ Cable as the data plane connection between Node device, the interface is automatically configured to operate at 40 Gbps. If you use the QSFP+ Cable to interconnect a QFX3600 Node device with another device, the interface is automatically configured to operate as four 10-Gigabit Ethernet interfaces over one cable.

Monday, September 2, 2013

SFP 10G LR Transceiver are single mode hot swappable

The small form-factor pluggable (SFP) is also called Mini GBIC is a hot-pluggable transceiver used for both telecommunication and data communications applications.It interfaces a network device for a switch, router, media converter or similar device to a fiber optic or copper networking cable.   And SFP Transceiver are designed to support communications standards including SDH, SONET, Gigabit Ethernet, Fibre Channel, and other communications standards.Cisco SFP 10G SR Transceiver are single mode hot swappable 10GBase LR SFP+ modules with duplex LC optical interface and small form factor design. Its max working distance is 10km over single mode 9/125 optical fiber. Cisco SFP 10G LR transceivers are the smallest modules used for 10G applications and low power consumption. We supply Cisco SFP 10G LR equivalent transceivers, our products are same performance but much more competitive prices.Certain SFP Transceiver also use copper cables as interface. This Low-Power RF will cause a device in the network to send their data over shielded or unshielded twisted pair cable. Usually such copper cable interfaces are used when the information to be transmitted needs to cover only shorter distances where use of copper cable is more economical than optic fiber cables.

Sunday, September 1, 2013

Corning Cable Systems technology and standards manager Doug Coleman

Corning Cable Systems (Corning Cable System) technology and standards manager Doug Coleman pointed out: “We close cooperation with Avago test the various Corning Cable Systems fiber products, which contain the Corning ClearCurve SFP+ DAC TWINAX cable 50CM  multimode fiber and Avago parallel optical transceiver mix between design engineers the flexibility to develop innovative data center applications. cooperation confirmed Avago’s the QSFP + eSR4 module meets the the connection distance requirements of the 10G and 40G Ethernet applications specifications.

Gigabit Ethernet came to life more than a decade ago, and has become the de-facto standard connection in nearly every single NIC shipped with servers, desktop PCs, and Laptops. While Local Area Networks ran on Gigabit, the WAN that aggregates at most ISP’s Last-Mile office are only lower bandwidth usually 2 to 10 Mbps to each resident location via DSL or Cable.However, in the last few years with Verizon FIOs, and other operator switching to providing last-mile Fiber connection, residents have been able to enjoy 10Mbps to 50Mbps connections at home. Cable companies XFINITY Home such as Time Warner and Cable Vision has since also started offering high bandwidth Cable that provides 10Mbps to 30Mbps connections to residents. What this means are the old Gigabit edge Switches and 10 Gigabit Core aggregation is soon going to be not enough to support the growing network infrastructure by the demands of residential consumers who are streaming gigabytes of data at each location.