Application of MPO Cabling in High-Density Data Center

by http://www.fiber-mart.com

Fiber optic jumper applications in the data center are very extensive, and in recent years the data center fiber optic transmission system bandwidth demand shows a high growth trend, so the use of a new generation of fiber and optical modules can continue to explore the potential of fiber-optic network bandwidth growth. As the multimode fiber jumper in the cost of a great advantage, to promote its application in the data center.
With the continuous drive of the application and popularization of the network media in the cloud computing environment, the multimode fiber jumper is also developing, from OM1 to OM2, and from OM3 to OM4 to use the VCSEL laser optimization technology, the bandwidth demand is increasing. New OM4 Multi-mode jumper fiber standard EIA/TIA492AAAD is introduced, which provides a better transmission mode for multimode fiber in the future wide application. This article provides an ideal communication solution for your data center, servers, network switches, telecentres, and many other embedded applications that require high-speed data transmission.
In a transport port connection device in a 40G / 100G data transmission application, such as QSFP optical modules, regardless of Fiber Channel connections using several fiber connections, and regardless of the type of fiber connection, they are connected directly to the MTP / MPO connector. Because the 40G / 100G data transmission application channel and the device connection between the equipment need to form a special mode, so that the device’s transmitter and receiver channels corresponding to each other, which requires MTP / MPO connector to complete the connection.
The MPO/MTP fiber jumper can provide a wide range of applications for all networks and devices that require 100G modules. They use the high-density multimode fiber optic connector system MT series of casing design, MPO / MTP fiber jumper with UPC and APC polished end, and also supports multimode and single-mode applications. The 10G OM3 / OM4 MPO / MTP fiber jumpers provide 10 Gbps of data transfer rates in high-bandwidth applications, which are five times faster than the standard 50 μm fiber jumper.
At the same time, multi-mode MPO / MTP fiber jumpers are also the most economical choice for most of common optical fiber communication systems. Single-mode MPO / MTP fiber jumper is mainly used for long-distance data transmission system. The MPO / MTP trunk cable is designed for data center applications. Typically, single-mode and multi-mode MPO / MTP fiber jumpers are designed to be 3mm or 4.5mm round cable, and connectors at both ends of the cable are also referred to as MPO / MTP connectors.
The MPO / MTP high-density push-pull fiber jumpers are currently used in three areas: high-density cabling data centers, fiber-to-the-home, and connection applications with a splitter, 40G QSFP+ / 100G QSFP28, 10G SFP+ and other optical modules. Today, there are already a series of high-density parallel optical interconnect products that can accommodate optical fiber transmission in modern data centers, such as custom MPO / MTP fiber jumpers, multimode fiber loopers, and QSFP+ high-speed cable assemblies.
Server virtualization and the development of cloud computing, as well as the development trend of network convergence, bringing a faster and more efficient data center network development needs. At present, 48x 10G channel composed of 10G switches, mainly limited to the use of SFP+ module to achieve the connection. In order to meet the higher bandwidth requirements, users can use a high-density QSFP+ high-speed cable to complete the connection, by increasing the data transmission rate of each channel and increase the port density to meet customer’s high bandwidth requirements.

How does the POE switch apply to the Security Network monitoring field?

by http://www.fiber-mart.com

PoE switch performance is more advanced and sophisticated, the appearance is more and more handsome. With the development of network monitoring, PoE switch applications are more and more common, so a lot of information about PoE switch can be found on the Internet.
So, there are a lot of articles on the PoE switches and network monitoring, and some people say PoE switches to promote the development of network monitoring, and some others say that network monitoring to promote the development of PoE switches, then in the end who promoted who?
Referred to the surveillance camera, is really all over the city streets in various places, as long as you live in the city, everywhere you can see his shadow. Although sometimes very annoying, but have to say that a variety of monitoring measures do put an end to a lot of violations of the crime, but also can provide a basis for the incident.
With the planning of “Safe China”, “Intelligent City” and other projects, as well as the increased safety awareness of people, the scale of video surveillance installation and the radiation area are getting bigger and larger, the project scope of which involves the whole city, the camera reaches tens of thousands. However, not every place is suitable for the installation of network cameras, that is to say, the installation of network video surveillance equipment is constrained by the environment, which to some extent restricts its development.
We know that all devices need the power to work, and surveillance cameras are no exception. In the traditional monitoring system, usually using mains power or centralized power supply, and in network monitoring, these modes of power supply sometimes can not meet the needs. Because it is network monitoring, of course, a need of network cable, if you want to supply additional cable, especially in some inconvenient power supply environment, the construction becomes extremely complex and troublesome, at this time, have to redeploy the camera installation location, this also lost the significance of monitoring.
How to solve this difficulty? Thus, the technology of PoE, which can be powered by Ethernet, has received wide attention and attention. Through the technology of PoE Power supply, the power signal can be added to the network cable, which is transmitted to the other end of the equipment which needs to be powered. This can be an excellent solution to network monitoring power supply problems, as long as the power and data through a cable can be completed transmission, not only solve the power supply problems, and make the project easy to do, as long as the network cable to the place, you can make equipment to obtain a steady supply of electricity.
In order to make PoE better applicated in the security network monitoring, PoE switches can be quickly promoted. Commonly used PoE power supply equipment includes PoE module and PoE switches, that is the most common used.
PoE switch is also a kind of switch, the biggest difference between ordinary switches is that it can be a power supply, not only has the ability to transfer data. In other words, the PoE switch can not only transmit data can also power supply, which is also appropriate for the network monitoring needs, because the surveillance cameras need both power supply, there is a need to collect the monitoring data sent out. With the PoE switch, the surveillance camera can be installed at any optimal point without the need for environmental and power access restrictions. PoE switch is also favored by many system integrators because of its high performance, simple use, easy management, convenient networking and low construction cost.
The PoE switch that we often refer to is the standard PoE switch, which supports IEEE802.3AF/T power supply standards, but there are also non-standard PoE switches on the market. Non-standard PoE switch Although the price is relatively cheap, but because of the existence of the hidden dangers of the front-end cameras, we recommend that you choose carefully.
Conclusion
What is the relationship between network monitoring and PoE switch? Our view is that they are two different concepts, but can promote each other, but it is necessary to note that network monitoring is not a PoE switch can still be done, and the PoE switch is not network monitoring, its application will be greatly compromised. It can be understood that the PoE switch is a transmission power supply device for network monitoring.PoE switch performance is more advanced and sophisticated, the appearance is more and more handsome. With the development of network monitoring, PoE switch applications are more and more common, so a lot of information about PoE switch can be found on the Internet.
So, there are a lot of articles on the PoE switches and network monitoring, and some people say PoE switches to promote the development of network monitoring, and some others say that network monitoring to promote the development of PoE switches, then in the end who promoted who?
Referred to the surveillance camera, is really all over the city streets in various places, as long as you live in the city, everywhere you can see his shadow. Although sometimes very annoying, but have to say that a variety of monitoring measures do put an end to a lot of violations of the crime, but also can provide a basis for the incident.
With the planning of “Safe China”, “Intelligent City” and other projects, as well as the increased safety awareness of people, the scale of video surveillance installation and the radiation area are getting bigger and larger, the project scope of which involves the whole city, the camera reaches tens of thousands. However, not every place is suitable for the installation of network cameras, that is to say, the installation of network video surveillance equipment is constrained by the environment, which to some extent restricts its development.
We know that all devices need the power to work, and surveillance cameras are no exception. In the traditional monitoring system, usually using mains power or centralized power supply, and in network monitoring, these modes of power supply sometimes can not meet the needs. Because it is network monitoring, of course, a need of network cable, if you want to supply additional cable, especially in some inconvenient power supply environment, the construction becomes extremely complex and troublesome, at this time, have to redeploy the camera installation location, this also lost the significance of monitoring.
How to solve this difficulty? Thus, the technology of PoE, which can be powered by Ethernet, has received wide attention and attention. Through the technology of PoE Power supply, the power signal can be added to the network cable, which is transmitted to the other end of the equipment which needs to be powered. This can be an excellent solution to network monitoring power supply problems, as long as the power and data through a cable can be completed transmission, not only solve the power supply problems, and make the project easy to do, as long as the network cable to the place, you can make equipment to obtain a steady supply of electricity.
In order to make PoE better applicated in the security network monitoring, PoE switches can be quickly promoted. Commonly used PoE power supply equipment includes PoE module and PoE switches, that is the most common used.
PoE switch is also a kind of switch, the biggest difference between ordinary switches is that it can be a power supply, not only has the ability to transfer data. In other words, the PoE switch can not only transmit data can also power supply, which is also appropriate for the network monitoring needs, because the surveillance cameras need both power supply, there is a need to collect the monitoring data sent out. With the PoE switch, the surveillance camera can be installed at any optimal point without the need for environmental and power access restrictions. PoE switch is also favored by many system integrators because of its high performance, simple use, easy management, convenient networking and low construction cost.
The PoE switch that we often refer to is the standard PoE switch, which supports IEEE802.3AF/T power supply standards, but there are also non-standard PoE switches on the market. Non-standard PoE switch Although the price is relatively cheap, but because of the existence of the hidden dangers of the front-end cameras, we recommend that you choose carefully.
Conclusion
What is the relationship between network monitoring and PoE switch? Our view is that they are two different concepts, but can promote each other, but it is necessary to note that network monitoring is not a PoE switch can still be done, and the PoE switch is not network monitoring, its application will be greatly compromised. It can be understood that the PoE switch is a transmission power supply device for network monitoring.

A Preferable Interconnect Solution for SFP+ Applications–SFP+ AOC Assemblies

by http://www.fiber-mart.com

Dramatically reducing 10G interconnectivity costs, the 10G SFP+ cables can provide inexpensive and reliable 10G speed connections using either SFP+ copper cables or SFP+ active optical cables (AOCs). SFP+ AOC is a cabling technology that accepts the same electrical inputs as a traditional copper cable. It uses optical fiber and electrical-optical conversion on the cable ends to improve speed and data transmission distance of the cable while not sacrificing compatibility with standard electrical interfaces. Nowadays, SFP+ AOC has been a preferable interconnect solution for SFP+ applications. Before choosing it for your applications, you need to have a basic understanding about it.
Description
AOC consists of multimode optical fiber, fiber optic transceivers, control chip and modules. SFP+ to SFP+ active optical cable is composed of SFP+ optical transceivers in both ends and fiber optic cable in between. This integrated optical module solution removes the complicated optical fiber interface and brings friendly and intuitive electrical-to-electrical interface to users. SFP+ AOC is designed to meet the requirements of high speed, high density and low power consumption for applications in today’s data centers via optical fiber wire. SFP+ AOC is compliant to industrial standard SFP MSA and provides high performance SFP+ interfaces, supporting 10Gb/s bi-directional operation. The demand for more bandwidth for data center is challenging interconnect technologies like Ethernet, Infiniband, and Fibre Channel. SFP+ AOC is one of the best solutions to solve this problem. The image below shows a Cisco SFP-10G-AOC10M compatible SFP+ to SFP+ AOC. It is a 10Gb/s, hot pluggable active optical cable for Ethernet data transmission.
Advantages
Compared to SFP+ copper cables for data transmission, SFP+ AOCs provide more advantages, as shown below:
Longer reach
Lower weight and tighter bend radius enable simpler cable management
Thinner cables allows better airflow for cooling
Lower power consumption
No need for power-hungry conditioning ICs on the host board
Application
SFP+ active optical cable is a 10Gbps and cost effective solution for 10G Ethernet (10GbE) applications. With industry-leading VCSEL technology and an advanced new light engine design, the SFP+ AOC assemblies are ideal for high-performance computing clusters, 10G Ethernet applications (10GbE), 4G and 8G Fiber Channel applications (4GFC/8GFC), 1x InfiniBand QDR, DDR, SDR, servers, switches, storage and network interfacing applications.
Conclusion
fiber-mart.com is a leading provider of optical and copper network equipment. We do provide a good selection of 10G SFP+ copper cables, both passive and active and options for SFP+ active optical cables. For example, IBM 95Y0326 compatible SFP+ to SFP+ active copper cable, HP J9285B and HP JG081C compatible SFP+ to SFP+ passive copper cables, and SFP+ AOC cables with various length choices like 1m, 3m, 5m, 7m, 10m, etc., all our SFP+ cables are 100% compatible with major brands like Cisco, HP, Juniper, Enterasys, Extreme, H3C and so on. If you would like to order high quality compatible SFP+ cables and get worldwide delivery. With a wide range of copper and optical networking equipment on offer, fiber-mart.com is sure to have the network equipment to fit your requirements.

What Are Simplex and Duplex Optic Patch Cords?

by http://www.fiber-mart.com

Fiber patch cord, also known as fiber patch cable or fiber jumper cable, is a fiber optic cable terminated with fiber optic connectors on its both ends. Fiber optic patch cables can be divided into different categories based on several different standards. For example, according to fiber cable modes, fiber optic patch cords can be divided into single mode and multi-mode; and according to fiber cable structures, they can be divided into simplex and duplex.
What are simplex and duplex optic patch cords? There is only one single strand of glass or plastic fiber in a simplex fiber patch cord. It is often used where only a single transmit or receive line is required between devices. A duplex fiber patch cord consists of two strands of glass or plastic fiber which are typically found in a tight-buffered and jacketed “zipcord” construction format. The duplex fiber is most often used for duplex communication between devices where a simultaneous and separate transmit and receive are required. Simplex and duplex fiber patch cords are both are available in single mode and multi-mode.
Simplex fiber patch cord has one fiber and one connector on each end. Both single mode and multi-mode simplex optic patch cords have only one single strand of fiber. The core of a single mode simplex optic patch cord is 8 to 10 microns. Light travels toward the center of the core in a single wavelength in single mode patch cables. The core of a multi-mode simplex optic patch cord is either 50 or 62.5 microns. The core of the latter gathers more light compared to the former, and allows more signals to be transmitted. Single mode and multi-mode simplex optic patch cords can be used for applications that only require one-way data transfer. It is just like that water only flows in one direction – downwards. So one end of a simplex fiber patch cord is a fixed transmission end, and the other is a fixed receiving end.
Duplex fiber patch cable has two fibers and two connectors on each end. There are single mode and multi-mode duplex optic patch cords. Duplex Single mode Fiber Patch CableA single mode duplex optic patch cord is constructed of two identical strands of single mode fiber. A multi-mode duplex optic patch cord is constructed of two identical strands of multi-mode fiber. For example, a duplex 9/125 single mode fiber patch cable has two strands of 9/125 micron single mode fiber, featuring a 9µm core and 125µm cladding; a duplex 62.5/125 multi-mode fiber patch cable has two strands of 62.5/125 micron multi-mode fiber, featuring a 62.5µm core and 125µm cladding. One fiber transmits data in one direction and the other one transmits data in the reverse direction. Each fiber is marked “A” or “B” or different colored connector boots are used to mark polarity. Every connector can only be connected to the corresponding port, same as the simplex situation. Duplex fiber patch cables are used in applications where data needs to be transferred simultaneously and bi-directionally, such as backbone ports, workstations, Ethernet switches, fiber switches and servers.
Simplex and duplex fiber patch cords have their respective features and applications. With different connectors or cable constructions, there can also be different categories of optic patch cords. These fiber patch cables can be with custom length. If you want to choose an optic patch cord, you need to take all these things into consideration, simplex or duplex, single mode or multi-mode, connectors, etc.

OM Types of Multi-mode Fiber Patch Cables

by http://www.fiber-mart.com

Fiber optic patch cords are optical cables capped on both ends with fiber optic connectors. According to fiber cable modes, fiber optic patch cords can be divided into single mode and multi-mode. Single mode fiber optic patch cables usually have a core of 8 to 10 microns. Multi-mode fiber optic patch cables have a core of either 50 or 62.5 microns. The larger core of multi-mode fiber patch cords gathers more light compared to single mode, and allows more signals to be transmitted. Transmission of many modes of light down a multi-mode fiber patch cable simultaneously causes signals to weaken over time and therefore travel short distance.
Multi-mode fiber patch cables are described by the diameters of their core and cladding. There are two different core sizes of multi-mode fiber patch cords: 50 microns and 62.5 microns. Both 62.5 microns and 50 microns patch cable feature the same glass cladding diameter of 125 microns. Thus, a 62.5/125µm multi-mode fiber patch cable has a 62.5µm core and a 125µm diameter cladding; and a 50/125µm multi-mode fiber patch cable has a 50µm core and a 125µm diameter cladding. Based on the cores, multi-mode fibers are described as OM1, OM2, and OM3, classified by the ISO 11801 standard. OM4, defined in TIA-492-AAAD, was published by the end of 2009. According to this, there are four types of multi-mode fiber patch cords, OM1, OM2, OM3, and OM4. The letters “OM” stand for optical multi-mode.
OM1 multi-mode fiber patch cord has a bigger core diameter, 62.5 microns, which makes it better on concentrating the light and bend-resistance. It is suitable for 100Mb and 1Gb. The max attenuation of OM1 fiber patch cable is 3.5dB/km working at 850nm, and 1.5dB/km at 1300nm. Overfilled launch of OM1 fiber optic patch cable at 850nm is 200MHz*km, 500MHz*km at 1300nm. It is widely used especially before the mid 1990s. Today, OM1 fiber optic patch cable is still a popular indoor use multi-mode fiber optic patch cable. But it has serious limitations for high speed demands.
OM2 multi-mode fiber patch cord has a core of 50 microns. Overfilled launch of OM2 fiber optic patch cable is 500MHz*km. OM2 50/125 multi-mode fiber patch cable is used in fiber optic telecommunications and high speed transmission systems that require simultaneous, bi-directional data transfer. 50µm fiber offers as much as ten times the bandwidth of 62.5µm fiber. OM2 fiber optic patch cables are orange jacketed and can be available in simplex and duplex with FC, SC, LC, ST, MTRJ or MU connectors.
OM3 multi-mode fiber patch cord also has a core of 50 microns, but the cable is optimized for laser based equipment that uses fewer modes of light. Due to this optimization, OM3 fiber patch cord is capable of running 10 Gigabit Ethernet at lengths up to 300 meters. OM3 fiber patch cable has an aqua jacket and effective modal bandwidth (EMB) of 2000. It is designed for 10 Gb/s transmission.
OM4 multi-mode fiber patch cord is a 50µm laser-optimized multi-mode fiber patch cable with extended bandwidth. It is used in networks where an overwhelming or extreme amount of data needs to be transferred. Like OM3 multi-mode fiber patch cables, OM4 is considered to be “laser optimized” or optimized for use with 850nm vertical cavity surface emitting laser (VCSEL) light sources. Both OM4 and OM3 fiber patch cables share the same distinctive aqua jacket. OM4 has been available for several years and has recently been officially standardized. It has a lower insertion loss and an EMB of 4700. It is the preferred technology for the emerging standards that will operate at 40Gb and even 100Gb up to 150m and is widely used in Data center applications.
Multi-mode fiber patch cords are a good choice for transmitting data and voice signals over short distances. These 4 types of multi-mode fiber patch cords are different from each other in many aspects, such as sizes of core. And their difference determines their respective characteristics and application areas. Fiberstore supplies a large variety of fiber patch cables with high quality. They can be available in OM1 ,OM2, OM3, and OM4, with different types of connectors. All the fiber optic patch cables are 100% optically tested for maximum performance before shipping worldwide.

What are the differences among OLT, ONU and ONT?

In recent years, Fiber to the Home (FTTH) is rapidly developing support technologies. The TOLT, ONU and ONT are now widely used in fiber network access in city. 

In recent years, Fiber to the Home (FTTH) is rapidly developing support technologies. The TOLT, ONU and ONT are now widely used in fiber network access in city. It can help efficiently reduce network construction cost, while simultaneously providing a guarantee on high bandwidth and high integration.

 

Optical Line Terminal (OLT)

 

OLT (Optical Line Terminal) is the endpoint hardware device located at the central office in a Passive Optical Network (PON). The OLT contains a central processing unit, a gateway router, voice gateway uplink cards and passive optical network cards. The main functionality of the OLT is to adapt the incoming traffic (voice/data/video) from the metropolitan rings into the PON transport layer. It can transmit a data signal to users at 1490nm wavelength. That signal can serve up to 128 ONTs at a range of up to 12.5 miles by using Optical Splitters.

 2df2eacd482cb14aa9b5ddece96b8e86.jpg

Optical Network Unit (ONU)

 

ONU converts optical signals transmitted via fiber to electrical signals. These electrical signals are then sent to individual subscribers. In general, there is a distance or other access network between ONU and end user’s premises. Furthermore, ONU can send, aggregate and groom different types of data coming from customer and send it upstream to the OLT. Grooming is the process that optimises and reorganises the data stream so it would be delivered more efficient. OLT supports bandwidth allocation that allows to make smooth delivery of data float to the OLT, that usually arrives in bursts from customer. ONU could be connected by various methods and cable types, like twisted-pair copper wire, coaxial cable, optical fiber or Wi-Fi.

 65c1d9d73c5b109df79b2559fb68c3f4.image.500x375

Optical Network Terminal (ONT)

 

ONU and ONT are basically the same device – ONT is located at the customer premise, and ONU is located outside the home. ONU can be working in different temperature and weather conditions. It should resist water, winds and vandals. The ONU usually communicates with an optical network terminal (ONT), which may be a separate box that connects the PON to TV sets, telephones, computers, or a wireless router.

 

Functions

OLT is generally employed for terminal connected to the fiber backbone. An OLT has two primary functions:

  • Converting the standard signals use by a FiOS service provider to the frequency and framing used by the PON system;
  • Coordinating the multiplexing between the conversion devices on the optical network terminals (OLTs) located on the customers’ premises.

 

ONT (Optical Network Terminal), also ONU (Optical Network Unit)

ONT location,is at the customer’s premises. Its purpose is to use optical fiber for connecting to the PON on the one side, while interfacing with customers on the other side. ONT supports wide variety of interfaces, depending on requirements of customer:

  • Digital video formats
  • Analog video formats
  • ATM interfaces (155 Mbps)
  • DS3 or E3 telephone connections (44.736 or 34.368 Mbps)
  • T1 or E1 (1.544 or 2.048 Mbps)
  • Various Ethernet rates

 

To describe simply, OLT means Optical Line Terminal. ONU is the Optical Network Unit. ONT means Optical Network Terminal.OLT use fiber cables, adapters and others to connect with ONU and ONT, in order to build ODN (Optical Distribution Network).Both of ONU and ONT are client-side devices, no difference in nature, but if you have to distinguish, it can be seen from the name difference.ONT is the optical network terminal, applied to the end user, and ONU refers to the optical network unit, which is with the end user. There may be other networks.give a simple example, such as in a district, ONT is directly on the user’s home equipment, and ONU may be placed in the corridor, each user through the switch and other equipment connected to the ONU.

 

Conclusion

The development of fiber optic networks, ONT and OLT are indispensable components in the GPON network system. Fiber-Mart provides OLTs for both EPON and GPON systems. Any question pls feel free to contact with us. E-mail: Service@fiber-mart.com