July 2014 - Fiber Optical Networking

Special Instructions of Cisco SFP Transceivers

The Cisco SFP transceivers are designed to change the serial electric signals to the serial optical signals which mainly maintain gigabit Ethernet, includes fiber channel and SONET/SDH, it provides a beneficial way, adopt the method of resolution in the university campus, data center, metropolitan areas, ring networks and store web site.

Ethernet converter net from one end to another in order to let more systems with different thread accurately corresponding associated Ethernet cable. This is likewise being used within the similar set up once there are several computers functioning with varying types of technology. In addition, optical fiber cable can defy from any type of electronic equipment, mobile phones and wireless complex which usually don’t like with the traditional Ethernet, such equipment which was exposed loses the signal interference. In this case, as converted into optical fiber Ethernet, because it provides a quick and excellent signal. The SFP is by the maritime safety administration or from IBM, lucent, Siemens, ample/TYCO and Infineon Multi-source is unqualified, this is the main content of the network vendor management. The SFP transceivers have the following advantages:

1. For reasons of that you can insert, optical fiber interface, still can modify on the end pace of the creation of the card.

2. It is able to accommodate a lot of connector interface or a combination of LX SFP and SX.

3. Since the basket of SFP transceiver is placed in the PCB in order to accept stated, it can reduce the additional program, thereby reducing the costs. As a result, it made it easier to reconfigure and replacement.

4. Because of optical element, SFP transceivers enhanced reliability. It allows the use of higher the temperature.

Cisco SFP is interchangeable, in addition to its flexibility, from a wide range of Cisco project. It can be used with Cisco 1000BASE-TX, 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-EX, 1000BASE-ZX, or 1000BASE-BX10-D/U in a port through the port joint.

Cisco SFP modules need to connect the one-piece structure to another, because it plays an important role in the most commonly used information technology business.

The SFP transceiver modules are generally hot-pluggable I/O devices that can easily get plugged into the module sockets. The transceiver efficiently connects the electrical circuitry of the module to the copper or optical network. Users can utilize any combination of SFP transceiver modules that the Cisco transceiver device assists. The only thing to take note here is that every port should match the wavelength requirements on the other end of the cable and that the cable should not exceed the concerned cable length in order to ensure consistent communication. It is recommended that users utilize the SFP transceiver Cisco modules only on the Cisco instrument. Every single Cisco SFP transceiver module assists the Cisco quality identification that enables a Cisco router or switch to identify and authenticate that the transceiver module is examined and approved by Cisco. Now I introduce SFP-10G-ZR compatible with Cisco devices in Fiberstore. it is cheaper than Cisco company. The SFP-10G55-80-CO series single mode transceiver is small form factor pluggable module for duplex optical data communications of 10G. This transceiver offers the same function with Cisco SFP-10G-ZR and it is fully compatible with Cisco devices. It is with the SFP+ 20-pin connector to allow hot plug capability.This module is designed for single mode fiber and operates at a nominal wavelength of 1550 nm.

Fiberstore was founded in 2001, our focus is to provide high quality fiber interface, SFP compatible modules, GBIC LAN and WAN networks and related products. Fiberstore believes that the road to success is through excellence and customer service. And now Fiberstore in order to feedback customer of their comings, it is making with 30% discount of the price, it you want know more information about these fiber optical transceivers welcome to visit our Fiberstore.

Twisted-pair and Direct Attach Twinax Cables Will Become a Trend

Now fiber optic transceivers are commercially available for almost all international and industrial standards, including Ethernet, Fast Ethernet, Gigabit Ethernet, 10Gbit Ethernet. What’s take an important role in this situation is SFP fiber optic transceiver. So let’s take an eye on it. SFP is also called small form-factor pluggable which is a version of Mini GBIC. at first sight, you can find the size is only half of GBIC. It supports data rates up to 10 G. The SFP Transceiver are available with a variety of transmitter and receiver types. What’s more, it is with LC interface. The kind of SFP transceiver module called SFP-10G-SR in Fiberstore is a quite well choice, it is nearly same as Cisco SFP 10G SR. SFP is regarded as a hot pluggable module, this make it Effortless to alter and effortless for upkeep in comparison with conventional modules. It makes the Ethernet network easier to upgrade and sustain. End users can replace a Solitary SFP module Throughout the Procedure Rather of replace the complete board with various modules on it.

SFP+ twinax cables are copper cables with two SFP+ transceivers attached on either end. This SFP cable is also known as Direct Attach Cables (DAC). Using twinax cable is significantly cheaper than connecting devices using two 10 Gbps fiber optic transceivers over fiber cable. There are two types of twinax cables. active and passive. In IBM b-type switches only active cables are supported which contain Vital Product Data (VPD) information. Twinax cable is available in length of 1m, 3m, and 5m. Also referred to as twinax, a direct-attach twinaxial cable is very similar to coaxial cable, except for one additional copper conductor core. Both twinax cores are protected by an insulator layer and another metallic conductor surrounding the core pair. Analogous to twisted-pair cables, both cores are twirled together to diminish interference effects from outside sources.

Originally created by IBM for shorter-distance connections, twinax cables offer a cost effective way to interconnect Ethernet devices within racks and across adjacent racks. These cables are usually accommodated into the transceiver housing of a switch or server. Direct-attach 10 Gigabit Ethernet twinax cables have Enhanced small form factor pluggable (SFP+) compatible connectors while 40 Gigabit Ethernet twinax cables deploy Enhanced Quad small form factor pluggable (QSFP+) connectors.

On both data rates, twinax cables are available in the following types. Active: Have components in the SFP+ or QSFP+ housing to improve the signal quality. Usually covers 7 and 10 meters. Passive: Have straight conduction between devices and are available in 1, 3, and 5 meters. for example Cisco SFP-H10GB-CU1M and what SFP-H10GB-CU1M in Fiberstore has same functions with Cisco’s and it also fully compatible with Cisco devices, the same time the price is lower than Cisco’s. Twinax cables have achieved high popularity in data centers because of their high benefit/cost ratio. As an additional advantages, twinax cables present a much lower bit error rate (1 error in 10 E18 bits transmitted) than the IEEE requirements for 10 Gigabit Ethernet connections (1 error in 10E12 bits transmitted). Although the 2004 IEEE 802.3ak standard was the first to introduce 10 Gigabit Ethernet in Twinax cables (10 GBase-CX4), this superseded solution was based on infiniband twinax cables, The twinax cables currently used in 10 Gigabit Ethernet are standardized by the small form format committee standard SFF-8431 and 8461.

Although the Ethernet standardization process has its fair share of politics, the study of its timeline remains a good way to access the networking industry trends over the last three decades. we can see some trends, such as twisted-pair roughly increased ten times its data rate every five years. That pace, however, did not continue in speeds higher than 10 Gbps. Optical fiber had a slightly faster development, being the first media to support data rates higher than 100 Mbps. It also presented the highest longevity among all media. Twinax cables have risen as a viable Ethernet option for 10-Gbps connections.

Because of the higher cost of optical transceivers, fiber is typically employed on links between switches, where higher speeds are required the earliest. High-volume connections, such as server access, depend on lower costs to justify an upgrade to faster data rates. For that reason, twisted-pair and direct-attach twinax cables have been the most popular choices for these connections.

At last, The above information are come from Fiberstore fiber optic manufacturer. Go ahead to check out the details! And the same time there is a good news is that Fiberstore is making a 30% discount about most products, welcome you to visit our online store.

10GB Ethernet SFP Cable Configuration Guidelines

The 802.3 ae supplement that initially defined 10 Gigabit Ethernet was adopted in 2002 and recently Cisco to launch a product compliant with IEEE 802.3ae 10GBASE-SR/SW, Cisco SFP 10G SR, the SFP-10G-SR multi-mode transceiver in Fiberstore is SFP+ module for duplex optical data communications such as 10GBASE-SR and 10GBASE-SW. it is fully compatible with Cisco devices. This module is designed for multi-mode fiber and operates at a nominal wavelength of 850 nm.

The direct attach cables and their SFP module use an electrical signaling interface called SFI, which is defined as the “SFP + high-speed serial electrical interface.” The SFI definition enables 10 Gb/s operation over a single differential signaling path in each direction for a total of two pairs, or four wire connections. The twinax cable includes the two pairs of single-carrying wires in a coaxial cable format, providing high performance and stable signaling over the length of the cable.

The serial link transfers scrambled data at 10.3125 Gbaud to accommodate both data and the overhead associated with 64B/66B coding. The self-clocked nature eliminates skewing between clock and data signals. The SFI link requires a 100 ohm cable impedance, while the signal termination electronics provide both differential and common mode suppression of signal noise and reflections. 10GSFP-PC-30-1-CO series also provides SFP-H10GB-CU1M to compatible 10Gbase-CU SFP+ cable, it can connect SFP+ passive twinax cable assembly, and the length is 1 mete, compliant to SFP+MSA, This cable offers the same function with Cisco SFP-H10GB-CU1M and it is fully compatible with Cisco devices.

The SFP+ MSA specification for direct attach cables note that 10G SFP + CU connections can only be used on systems with common power grounds. The power supplies for the Ethernet switches, and for any computers or other switches that are connected to them over direct attach cables, must themselves be connected to the same local power grid with a common ground between all devices, as a difference in ground potentials between systems connected with DA cables could result in electrical damaged to the interfaces or the devices.

The direct attach cables used in the 10G SFP+CU system come in a limited range of sizes, worth lengths in the range from 0.6m to 7m being the most widely sold. It is up to you to verify which cable lengths are supported by your vendor, and whether the cable can be active or passive. Some vendors support both types of cables on their SFP+ ports, and others do not.

The twinax cable itself is relatively stiff, and many present difficulties if you need to route it through tight spaces. There are two conductors in each twinax cable, with two twinax cables inside a common sheath providing a total of four conductors for signals. As an example, one vendor’s direct attach cable has an outer diameter of 0.180 inches, or roughly 3/16 inch. The minimum bend radius for this cable is one inch. If you bend the cable any tighter than this, it may affect the signal quality.

For optical cable, fiber channel uses the SFP cable. The SFP provides for greater port density and meets the need for smaller connectors than the older SC duplex connector and gigabit interface connector (GBIC). A multi link communication path between two N_ports may be made up of links of different technologies. For example, it may have copper coaxial cable links attached to end ports for short-distance links. with single-mode optical fibers for longer-distance links between switches separated by longer distances. By providing a variety of physical interface options. Fiber channel allows an implementation to select the most appropriate option for a particular scenario.

Fiberstore is an industry’s leading supplier of optical communication products, its products are widely used in telecommunication systems and data communications network. With the strong compatibility of the products what exactly match the mainstream manufacturer’s equipment. Quality assurance in strict accordance with industry standards, and can provide the customized service according to customer’s actual application. And it is vary nice that Fiberstore is working with the price at a discount of 30% now and welcome you to visit and buy from our online store. The website is as follow. http://www.fiberstore.com/