Author: Fiber-MART.COM

by http://www.fiber-mart.comWe are going to talk about three types of appliance that are usually confusing the users, which are the matrix, switch, splitter. Most of you might have heard of the switch before while the switch we are talking about is not exactly same as the conventional switch. As the HDMI standard is getting more and more popular, in addition to HDMI copper cable, there are HDMI transceiver, AOC coming up these years. So far, we even have something more comprehensive which are the matrix, switch, and splitter. They could greatly expand the use of HDMI products by controlling the signal flow. 1.What is the switch of HDMI?The switch usually has various ports on its patch panel, usually, there are several HDMI input ports and a HDMI output port. With a tiny box like the image below, your monitor in the living room can display signal sourced by the case, PlayStation 4, etc. It’s like multiple signals can be sent to a monitor by the switch although the monitor can only display a single signal source at once. 2.What is the splitter of HDMI?The splitter has the opposite function to the switch, instead of integrating different types of signal, as you see, there are several HDMI output ports and a single HDMI input port, a single signal can be displayed to multiple monitors in the meantime by the splitter. A typical example is the television store, where the monitors on sale are supposed to display the same source in order to showcase the screen of monitors. 3.What is the matrix?As to the matrix, it is a kind of comprehensive appliance that has combined both of the function of switch and splitter. It’s mostly applied in the surveillance system and concerts, where the staffs need to switch the content on screens flexibly. ConclusionAlthough the function of each appliance is slightly different, the purpose is same which is to manage the relationship between the signal source and the monitor. Other than the device itself, you might need to pay attention to the standard of HDMI as well, there are HDMI 1.3, 1.4, and 2.0 being used but only HDMI 2.0 and above can support 4K (4096×2160) with 60 fps.

by http://www.fiber-mart.comThe products that adopt a certain standard called HDMI is getting bigger. Meanwhile, the demand for better solutions of public display and media transmission is unprecedentedly increasing. HDMI 2.0 is the most popular standard for now, along with HDMI 1.3 and HDMI 1.4. When it comes to the product itself, it can be classified based on how far they can transmit the signal. Here is a category provided by 10Gtek which is a manufacturer in Shenzhen to give us a glimpse of HDMI related products. 1. Short Range (0-10 meters)When the need for distance is under 10 meters, HDMI copper cable which is quite common now in your room is the only product that you can expect. As a copper cable, it can transfer electricity as well though it might limit the transmission speed of the signal. Currently, there are HDMI 1.3, 1.4 and 2.0 of HDMI copper cable can be bought in stores. 2. Medium Range (10-100 meters)For the medium range of around 10 to 100 meters. There are HDMI AOC (Active Optical cable), HDMI transceiver and HDMI extender provided by 10Gtek. It’s not that hard to comprehend the usage of AOC and transceiver since they are pretty same as those in Data Center, all you need to do is plugging in the AOC or transceiver correctly. By the way, 10Gtek provides transceivers of HDMI 1.3, extenders of HDMI 2.0 and HDMI 1.4. Unlike the optical transceivers, the HDMI transceivers may need to be additionally powered by USB Input Power Adapters. The chipset of the transceiver (TV) is SD1512, VL1503 and of the transceiver (DVD) is SD1502, VL1503. Actually, it might take some time to understand the operational principle behind the extender. Logically, the extender has the same purpose as the converter, which is to further the transmission range of devices. There is an only difference between the extender and converter, which is whether the transition happens in the appliance, if it happens then it’s an extender, vice versa. In addition, the chipset of the extender here is MAX3815. 3. Long Range (over 100 meters)Converters are the ideal choice for transmission range of over 100 meters. It can reach further than the extender because the signal will be transited from electricity to light during the transmission to reduce the signal loss. Please be aware of the sign of ‘TV’ and ‘DVD’ on the device since they indicate a correct connection. For instance, ‘DVD’ which means the transmitter (or sender), should be linked to signal source, while ‘TV’ stands for the receiver and therefore it should be linked to a monitor. 10Gtek’s converters support HDMI 1.4 and standard SFP+ port. The chipset of converter we have mentioned is SD1512 for DVD side and SD1502 for TV side. ConclusionIn fact, HDMI related products are more than what we have mentioned above. There are HDMI switch, HDMI splitter, HDMI matrix, and HDMI adapter will be introduced in articles written by fiber-mart.com later.

by http://www.fiber-mart.comWith the sharp increased of Ethernet data processing in the applicable field of cloud computing, super computer, IDC and enterprise data center etc., we are now seeing large demand of I/O. To keep pace with network development and meet the demand, transmission data rates have upgraded from 1Gb/s to 10Gb/s. To accomplish 10GBASE Ethernet network, there are different existing solutions to the access including DAC(Direct Attach Cable) and 10GBASE-T SFP+ transceiver. Each of which comes with distinguished benefits and shortages from each other. But the 10G SFP+ copper transceiver achieves the connectivity with power saving by employing CAT6a/7 cabling structure, and it has a advantage of much flexible usage. 10GBASE-T SFP+ Copper Transceiver Overview10GBASE-T, know as the standard of IEEE802.an, which was released in 2006 support 10Gbps Ethernet network over un-shielded or shielded twinax cables(CAT6/CAT7) with a distance of up to 30m by CAT6 copper. It has developed by the forth generation BASE-T technology of IEEE standard. Upon combined with RJ45 connector and un-shielded twisted pair copper cable to implement 10Mbps, 100Mbps, 1Gbps and 10Gbps data transmission,while compatible application with previous generations. Noticeably, this is the first 10G SFP+ module with RJ45 connector available to deliver a rate of up to 10Gb/s over copper cables. By Compliant with SFF-8431 and SFF-8432 MSA(Multi Source Agreement), the 10G SFP+ copper transceiver is typically invented for high speed network transmission based on 10G Ethernet. SFP+ DAC Twinax Cable Basics10G SFP+ DAC is established on copper inter-connectivity by using a twinax cable assembly to connect with SFP+ housing. It substitutes the costly optical transceiver required in the Ethernet deployment and tremendously decreases the power consumption, latency and installation time. Based on above, it’s the prior choice of SFP+ DAC to adapt to modern 10G network with requirement of short-distance and high-speed. With a limited transmitted length of up to 12m, SPF+ DAC is very much general used in intra-rack and inter-rack connections. such as interconnected with top-of-rack switches and servers, as well as between storage devices in one rack or neighboring racks. 10GBASE-T SFP+ Modules Vs. SFP+ DAC CablesIn terms of transmission length, 10GBASE-T SFP+ is 30m much wider range than SFP+ 10G copper cable which is 7m. 10GBASE-T SFP+ Module has low power consumption copper module which is meaningful to heavy-loaded 10G data center. Despite 10G SFP+ DAC cable has considerably lower overall cost when the counting includes switch, NIC and cable, however 10GBASE-T copper SFP+ transceiver features better flexibility and broader reach length. For data centers, SFP+ 10G copper cable is very much good enough for it’s  transmission requirement, that’s why SFP+ DAC is popular and practical to new data centers. But for wiring closets, 10GBASE-T copper SFP+ module is definitely a priority in order to meet a comprehensive demand of broaden bandwidth, competitive price and down power consumption. ConclusionConsidering above benefits compared SPF+ DAC, we believe 10GBASE-T SFP+ copper transceiver is your first choice to build a flexible and cost-effective 10G Ethernet network. With the continual decrease of it’s price and power consumption, 10GBASE-T will just tend to be more and more popular than SFP+ solutions in 10G rack-based data center that use ToR Switch. 

by http://www.fiber-mart.comWhat’s SFP+ DAC Twinax Cable?10G SFP+ DAC is established on copper inter-connectivity by using a twinax cable assembly to connect with SFP+ housing. It substitutes the costly optical transceiver required in the Ethernet deployment and tremendously decreases the power consumption, latency and installation time. Based on above, it’s the prior choice of SFP+ DAC to adapt to modern 10G network with requirement of short-distance and high-speed. With a limited transmitted length of up to 12m, SPF+ DAC is very much general used in intra-rack and inter-rack connections. such as interconnected with top-of-rack switches and servers, as well as between storage devices in one rack or neighboring racks. Active or Passive?Generally speaking, SFP+ DAC active cable is much expensive than SFP+ DAC passive cable. This is because of it needs DC power to integrate signal processing circuitry into the built-in connectors of SFP+ DAC active cable with a length link of up to 12m, while the passive cable doesn’t have electrical components so it requires little or no power to operate. Suggestion on how to choose active or passive depends on the transmit distance you require: passive for transmit link no greater than 7m but active is for more than 7m. Branded or Compatible?An OEM SFP+ DAC is much more costly than a compatible SFP+ DAC. Based on identical industry standard, users are strongly suggested to buy compatible SPF+ DAC twinax cable with competitive price but same performance as branded ones. By rigorously testing and verifying, 10Gtek supplies SFP+ to SFP+ copper twinax cable which are compatible with prevailing manufactures such as Cisco, Juniper, Arista, Brocade and Extreme etc., in this way, cost-effective is no more a obstacle to connect with various brands of devices. AWG and Length Wire Gauge is another important factor to consider SFP+ DAC twinax cable, which is in different specs of 24AWG, 26AWG, 28AWG and 30AWG. To explain, 24AWG(active) is adapted to a length of up to 12m while 30AWG(active) can support a length of up to 7m only. That is to say, the longer distance of transmission, the lower AWG rating is required. Can SFP+ DAC Twinax Cable be Connected to SFP Ports?Yes, you can plug SFP+ DAC twinax cable to SFP ports because of its attribute of backward compatibility. But reversely SFP cable is not compatible to SFP+ ports, even it can be plugged into SFP+ ports but that won’t work because it’s not a 10Gb/s data rate design of SFP cable.

by http://www.fiber-mart.com10GBASE-T, or IEEE 802.3an-2006, is a standard released in 2006 to provide 10Gbit/s connections over unshielded or shielded twisted pair cables, with distances up to 30 meters (98 ft) with RJ45 connectors on an electrical transceiver (or copper transceiver). It’s backward-compatible with existing 1GbE (1 Gigabit Ethernet) networks, meaning that it can be deployed based on existing 1GbE switch infrastructures in data centers that are cabled with CAT6 and CAT6A (or above) cabling. 10GBASE-T is a cabling solution of 10GbE, the other 10GbE cabling solutions include SFP+ fiber (10G-SR,10G-LR,10G-LRM, etc.), SFP+ Direct Attach Cable (DAC), SFP+ Active Optical Cable (AOC). The most outstanding difference between optical transceivers and electrical transceivers is the transport media they use, as a result, optical transceivers should be linked with optical fiber and electrical transceivers should be linked with networking cables such as CAT6. Generally, transceivers are meant to be optical because there are RJ45 electrical ports on switches for potential connection need of networking cables. However, the fact is we don’t have enough RJ45 electrical ports on the switch for networking cabling every now and then, it’s unlikely to replace the functional switch merely for a temporary or occasional use of electrical ports. In this case, a product that can convert the optical port to the electrical port, which is a 10GBASE-T copper transceiver can certainly give you a hand. Even more than that, the 10GBASE-T copper transceiver, for example, the 10G-SFP-T (SFP-10G-T-S) of 10Gtek, can backward-compatible with 100/1000Base-T as well, surely it’s a good news for those Data Centers built years ago, by this means the owner can save a bunch of budget from it. Even so, in order to achieve the expected effect, the electrical transceivers inevitably consume more power than optical transceivers, which limits the amount of 10GBASE-T transceivers being installed at the same time. Whether the chipset is Marvell or Broadcom, the power consumption of electrical transceivers is still 2.5 W. As to the chipset, 10Gtek is applying Marvell on the 10G-SFP-T because it costs lesser than Broadcom though they have the same function.