SFP-GE-S-2 VS. GLC-SX-MM: What’s the Difference?

SFP-GE-S-2 and GLC-SX-MM are Cisco 1000BASE-SX SFP multimode fiber transceivers. Since there are similar specifications for these two multimode modules, many end users may be confused when choosing a multimode fiber SFP LC connector SX transceiver for their Cisco switches. So, are they the same one? This post intends to give a simple explanation of SFP-GE-S-2 vs. GLC-SX-MM.

SFP-GE-S-2

SFP-GE-S-2 Module

Cisco SFP-GE-S-2 is a 1 GbE SFP SX fiber transceiver that supports the maximum data rate of 1Gbps. It’s compatible with the IEEE 802.3z 1000BASE-SX standard, and can operate on standard multimode fiber optic link spans of up to 2 km.

Module/Specs Cisco SFP-GE-S-2
Interface LC duplex
Wavelength 1310nm
Tx power -9.5 ~ -3dBm
Receiver Sensitivity < -17dBm
DOM Support Yes
Temperature Range 32℉to 158℉
(0℃ to 70℃)
Data Rat 1G
Fiber Mode MMF

GLC-SX-MM Module

GLC-SX-MM transceiver is also a Cisco 1000BASE-SX fiber transceiver that designed for Gigabit Ethernet applications. This SX module is compatible with the IEEE 802.3z 1000BASE-SX standard, and can operate on standard multimode fiber optic link spans of up to 550m.

Module/Specs Cisco GLC-SX-MM
Interface LC duplex
Wavelength 850nm
Tx power -9.5 ~ -3dBm
Receiver Sensitivity < -17dBm
DOM Support No
Temperature Range 32℉to 158℉
(0℃ to 70℃)
Data Rat 1G
Fiber Mode MMF

SFP-GE-S-2 VS. GLC-SX-MM

From the above specs comparison, we can learn that these two SX multimode modules support same data rate and operating temperature range. They all can operate on the multimode fiber optic cables. The main differences include:

  • Wavelength

SFP-GE-S-2 can support a wavelength of 1310nm, whereas GLC-SX-MM works in 850nm.

  • Transmission Distance

SFP-GE-S-2 can support up to 2km over laser-optimized 50 μm multimode fiber cable, while GLC-SX-MM can operate on legacy 50 μm multimode fiber links up to 550m.

  • DOM Support

SFP-GE-S-2 can support DOM, but GLC-SX-MM does not have DOM function. DOM (Digital Optical Monitoring) is an important function available on fiber optic transceiver. It allows users to monitor parameters of modules, such as optical output power, optical input power, temperature, laser bias current and transceiver supply voltage. In real time, it offers users more convenience when using optical modules.

  • Price

GLC-SX-MM is a legacy model, it doesn’t feature DOM function. It comes with the lowest price compared with other SX modules . Take FS.COM compatible transceivers as example, SFP-GE-S-2 costs $ 11.00, while GLC-SX-MM is only $ 6.00.

Conclusion

From the contents above – SFP-GE-S-2 vs. GLC-SX-MM, we can draw a conclusion that these two SX multimode fiber transceivers nearly can be used as the same one type module sometimes, but their existing differences still differ them from some applications. Most of the Cisco switches and routers support all two models, but please note, some of the switches require different models, you may visit Cisco SFP Compatibility Matrix for more detailed information.

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SFP 40 km VS. DWDM SFP: Which to Choose?

Small Form-factor Pluggable (SFP) is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. It is also called mini-GBIC for its smaller size, which is the upgraded version of GBIC transceiver. These 1Gb SFP modules are capable of supporting speeds up to 4.25 Gbps. And they are most often used for Fast Ethernet of Gigabit Ethernet applications. It interfaces a network device motherboard (for a switch, router, media converter or similar device) to a fiber optic or copper networking cable. SFP modules are commonly available in several different categories: 1000BASE-T SFP, 1000BASE-EX SFP, 1000BASE-SX SFP, 1000BASE-LX/LH SFP, 1000BASE-BX SFP, 1000BASE-ZX SFP, CWDM SFP and DWDM SFP. These modules support different distance according to the different Gigabit Ethernet standard. Today’s main subject will discuss SFP 40 km vs. DWDM SFP.

FS.COM Optical Transceivers

SFP 40 km

SFP 40 km transceiver is designed for highly reliable fiber optic network links up to 40 km. It is a cost effective transceiver designed to enable 1Gb for data center and core network applications. 1000BASE-EX SFP is the most popular SFP 40 km transceiver which runs on 1310nm wavelength lasers and achieves 40km link length. Except that, 1000BASE-BX BiDi SFP, 1000BASE-LH SFP and 1000BASE-LX SFP can also realize the transmission distance up to 40 km. The following will introduce these 1GbE SFP 40 km transceivers respectively.

1000BASE-EX SFP 40 km

1000BASE-EX SFP transceiver module is designed to connect a Gigabit Ethernet port to a network and has dual LC/PC single mode connectors. It operates on standard single-mode fiber-optic link spans of up to 40 km in length. The SFP Ethernet module provides a dependable and cost-effective way to add, replace or upgrade the ports on switches, routers and other networking equipment. Cisco GLC-EX-SM1550-40 and Cisco GLC-EX-SMD are 1G single mode fiber SFP 40 km modules for 1000BASE-EX Gigabit Ethernet transmission. GLC-EX-SM1550-40 supports a 1550nm wavelength signaling, while GLC-EX-SMD supports a 1310nm wavelength signaling.

SFP 40 km

1000BASE-BX SFP 40 km

1000BASE-BX SFP is a kind of BiDi transceiver, which can be divided into 1000BASE-BX-D SFP and 1000BASE-BX-U SFP. These two SFP transceivers must be used in pairs to permit a bidirectional Gigabit Ethernet connection using a single strand of single mode fiber (SMF) cable. The 1000BASE-BX-D SFP operates at wavelengths of 1490nm TX/1310nm RX, and the 1000BASE-BX-U SFP operates at wavelengths of 1310nm TX/1490nm RX.

  • 1000BASE-BX-D BiDi SFP 40 km

Cisco GLC-BX40-D-I and GLC-BX40-DA-I are pluggable fiber optical transceivers for Gigabit Ethernet 1000BASE-BX and Fiber Channel communications. They support link length of up to 40 km point to point on single mode fiber at 1Gbps bidirectional and use an LC connector. The GLC-BX40-D-I transceiver transmits a 1490nm channel and receives a 1310nm signal, whereas GLC-BX40-DA-I transmits at a 1550nm wavelength and receives a 1310nm signal.

  • 1000BASE-BX-U BiDi SFP 40 km

Similar to 1000BASE-BX-D 40 km SFP , Cisco GLC-BX40-U-I and GLC-BX40-UA-I also support link length of up to 40 km point to point on single mode fiber at 1Gbps bidirectional and use an LC connector. The main difference is the wavelength: GLC-BX40-U-I transmits a 1310nm channel and receives a 1550nm signal, whereas GLC-BX40-UA-I transmits at a 1310nm wavelength and receives a 1490nm signal. A GLC-BX40-D-I or GLC-BX40-DA-I device connects to a GLC-BX40-U-I or GLC-BX40-UA-I device with a single strand of standard SMF with an operating transmission range up to 40 km.

1000BASE-LX SFP 40 km

1000BASE-LX is a standard specified in IEEE 802.3 Clause 38 which uses a long wavelength laser. The “LX” in 1000BASE-LX stands for long wavelength, indicating that this version of Gigabit Ethernet is intended for use with long-wavelength transmissions (1270 – 1355nm) over long cable runs of fiber optic cabling. Allied Telesis AT-SPLX40 and Allied Telesis AT-SPLX40/1550 are 1000BASE-LX SFP single-mode modules supports Gigabit Ethernet over single-mode cables at distances up to 40 km. AT-SPLX40 operates over a wavelength of 1310nm for 40 km, whereas AT-SPLX40/1550 operates over a wavelength of 1550nm.

1000BASE-LH SFP 40 km

Unlike 1000BASE-LX, 1000BASE-LH is just a term widely used by many vendors. Long Haul (LH) denotes longer distances, so 1000BASE-LH SFP modules operate at a distance up to 70 km over single mode fiber. Cisco Linksys MGBLH1 is a easy-to-install modules that provide a simple way to add fiber connectivity or to add an extra Gigabit Ethernet port to switches. The MGE transceiver can support distances up to 40 km over single-mode fiber at a 1310nm wavelength.

DWDM SFP

DWDM SFP transceivers are used as part of a DWDM optical network to provide high-capacity bandwidth across an optical fiber network, which is a high performance, cost effective module for serial optical data communication applications up to 4.25Gb/s. DWDM transceiver uses different wavelengths to multiplex several optical signal onto a single fiber, without requiring any power to operate. There are 32 fixed-wavelength DWDM SFPs that support the International Telecommunications Union (ITU) 100-GHz wavelength grid. The DWDM SFP can be also used in DWDM SONET/SDH (with or without FEC), but for longer transmission distance like 200 km links and Ethernet/Fibre Channel protocol traffic for 80 km links. Cisco C61 DWDM-SFP-2877-40 is a 1000BASE-DWDM SFP 40km transceiver, which is designed to support distance up to 40 km over single-mode fiber and operate at a 1528.77nm DWDM wavelength (Channel 61) as specified by the ITU-T.

DWDM SFP

SFP 40 km VS. DWDM SFP

  • Transmission Medium

Generally, the standard SFP 40 km transceivers transmit through the single mode fiber, while DWDM SFP carries signals onto a single optical fiber to achieve maximum distances by using different wavelengths of laser light. So the DWDM SFP transceivers do not require any power to operate.

  • Wavelength

The standard SFP 40 km transceivers support distances up to 40 km over single-mode fiber at a 1310nm/1550nm wavelength. (the BiDi SFP has 1490nm/1550nm TX & 1310nm RX or 1310nm TX & 1490nm/1550nm RX ). However, DWDM SFP operates at a nominal DWDM wavelength from 1528.38 to 1563.86nm onto a single-mode fiber. Among them, 40 km DWDM SFP operates at a 1528.77nm DWDM wavelength (Channel 61).

  • Application

DWDM SFP is used in DWDM SONET/SDH, Gigabit Ethernet and Fibre Channel applications. These modules support operation at 100Ghz channel. The actual SFP transceiver offers a transparent optical data transmission of different protocols via single mode fiber. And for back-to-back connectivity, a 5-dB inline optical attenuator should be inserted between the fiber optic cable and the receiving port on the SFP at each end of the link.

  • Price

DWDM provides ultimate scalability and reach for fiber networks. Boosted by Erbium Doped-Fiber Amplifiers (EDFAs)  – a sort of performance enhancer for high-speed communications, DWDM systems can work over thousands of kilometers. Most commonly, DWDM SFP is much more expensive than the standard SFP. You can see the price more clearly in the following cable.

SFP 40 km VS. DWDM SFP

Conclusion

1000BASE SFP transceiver is the most commonly used component for Gigabit Ethernet application. With so many types available in the market, careful notice should be given to the range of differences, both in distance and price of multimode and single-mode fiber optics. Through SFP 40 km vs. DWDM SFP, if you are looking for SFP modules over long distance and with better scalability, DWDM SFP module is the ideal choice.

Related Article: SFP Transceiver: To Be or Not To Be?

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Where to Buy Reliable Low Cost 1000BASE-T SFP Modules?

Gigabit Ethernet, as a part of the Ethernet family of computer networking and communication standards, has been in the market for more than 15 years. 1000BASE-T Gigabit Ethernet is the most successful networking technology in the history. Delivering Gigabit performance over up to 100 meters of twisted pair cabling (Cat5 UTP), it is ideal solution to upgrade network smoothly without change its original architecture and decrease the cost of upgrading for a wide range of enterprise and embedded networking applications. When investing in 1000BASE-T SFP modules to keep the highest working quality for business, everyone wants to find the best deals when they come to their network hardware, but also with the same compliance certification and quality. So where to buy reliable low cost 1000BASE-T SFP modules? This article will tell you answer.

1000BASE-T SFP

1000BASE-T SFP for Copper Networks

1000BASE-T SFP copper transceiver is based on the SFP Multi Source Agreement. It is compatible with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE 802.3z and 802.3ab. This Gigabit RJ45 copper SFP transceiver module supports 1000Mbps over Cat5 cables with RJ45 connector interface, which operates on standard Cat5 unshielded twisted-pair copper cabling of link lengths up to 100 m (328 ft). So those 1G copper SFPs can plug into any standard SFP interface allowing for 1000BASE-T Gigabit transmission. When referring to the types of 1000BASE-T copper SFP modules, there are generally three types provided by Cisco: Cisco GLC-T, Cisco GLC-TE, Cisco SFP-GE-T.

Cisco GLC-T

Cisco GLC-T

GLC-T is the Cisco 1G copper SFP, which is compliant to IEEE 802.3, and operates over Cat5 copper wire for a distance of 100m. It provides 1Gbps data transfer and full-duplex Gigabit Ethernet connectivity to high-end workstations and between wiring closets over existing copper network infrastructure.

Cisco GLC-TE

Similar to GLC-T SFP modules, GLC-TE provides a link length of 100m over Cat5 copper wires. The only difference between these two SFP modules lies in the operating temperature range. GLC-T SFP is commercial temperature range (COM) from 0 to 70°C (32 to 158°F), while GLC-TE is Extended temperature range (EXT) from -5 to 85°C (23 to 185°F).

Cisco SFP-GE-T

SFP-GE-T is Cisco copper SFP transceiver that works with 1000BASE-T. This 1Gb SFP RJ45 module is with spring latch for high density applications. The most difference is that SFP-GE-T has the function of NEBS 3 ESD. (NEBS is short for Network Equipment Building System and is a set of standards for building networking equipment which can withstand a variety of environmental stresses.) Therefore, SFP-GE-T supports extended working temperature.

Where to Look for Compatible Cisco 1000BASE-T SFP?

There are all sorts of resources to get the most out of technology budget, especially when it comes to find the Cisco 1000BASE-T SFP modules either for brand new, refurbished, or gently used. What are the best ways to find them for a much more inexpensive price?

  • Online Retailers

Online retailers with warehouses not only provide consumer-side purchasing with modules and networking hardware, they can also be a valuable asset to all sorts of companies looking to spend less money on equipment. There are online retailers that give almost as high as 90% discounts and price reductions. You need to be careful when it comes to certain warehouses as they might have huge savings but the parts might be used or not of the highest quality.

  • Certified Sellers

Certified sellers, or re-sellers, can offer brand new or refurbished modules with great prices. Besides, they have professionals who can help you with all of your technology questions and make sure that you get the best deal.

  • Third-Party Companies

In fact, there are many third party vendors to manufacture compatible SFP modules, such as FS.COM, 10GTek, Finisar, Fluxlight etc. Many people are confused about whether I should use 3rd party SFP modules. Most “third party” transceivers are made and assembled in exactly the same plants assembling officially-branded transceivers. There is almost no big difference between an official Cisco transceiver and a third-party plug, aside from the branding and about two hundred to a few thousand bucks. And now, using 3rd party SFP modules seems to more and more popular, as many 3rd party SFP module vendors are providing high quality and reliable 3rd party SFP modules with low prices. Besides, third-party SFPs can be as reliable as official OEM products.

Copper SFP Models Description Operating Temperature Range FS.COM Price Fluxlight Price
Cisco GLC-T 1000BASE-T SFP Copper RJ-45 100m Transceiver COM $ 21.00 $ 44.00
Cisco GLC-TE 1000BASE-T SFP Copper RJ-45 100m Transceiver EXT $ 21.00 $49.00
Cisco SFP-GE-T 1000BASE-T SFP Copper RJ-45 100m Transceiver NEBS 3 ESD EXT $ 21.00 $44.00
Conclusion

The 1000BASE-T SFP copper transceiver offers a flexible and simple method to be installed into SFP MSA compliant ports at any time with no interruption of the host equipment operation. It enables for seamless integration of fiber with copper LAN connections wherever SFP interface slots can be found. Such system is economical, it saves time, offers flexibility and eliminates the necessity for replacing entire devices once the customers have to change or upgrade fiber connections and you will benefit so much from it.

Related Article: GLC-T vs GLC-TE vs SFP-GE-T: Which One to Choose?

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10G DWDM Tunable XFP – Up to 80 km Reach

With the spread of cloud computing and mobile broadband service, the volume of communications traffic has rapidly increased. In order to enable high-capacity optical networks, using a single optical fiber for optical signals of several different wavelengths in DWDM system is widely used. For this reason, tunable transceiver that enables ROADM functionality in next-generation networks is becoming more and more popular. In today’s market, there are mainly two kinds of tunable DWDM transceivers: tunable XFP and tunable SFP+. This article will take you to explore the DWDM C-band tunable XFP transceiver with 40 / 80 km transmission distance options.

10g-dwdm-tunable-xfp-transceiver

Tunable XFP Transceiver

Tunable XFP transceiver is an integrated fiber optic transceiver that provides a high-speed serial link at signaling rates from 9.95 Gbps to 11.35 Gbps. It complies with the ITU-T G.698.1 S-D100S1-2D standard with 50GHz channel spacing for SONET/SDH, IEEE DWDM 10GBASE-ZR for 40 or 80 km reach (Ethernet), and DWDM 10G FC (Fibre Channel) for 40 or 80 km reach applications. Tunable XFP can be tuned from channel C17 (1563.86nm) to C61 (1528.38nm). The maximum distance of this transceiver on a single mode fiber is up to 80 km. As mentioned above, tunable XFP optical transceiver is a full-duplex serial electric, serial optical device with both transmit and receive functions contained in a single module. On the transmit side, the 10 Gbps serial data stream is recovered, retimed, and passed to a modulator driver. The modulator driver biases and modulates a C-band-tunable integrated laser Mach-Zehnder (ILMZ), enabling data transmission over singlemode fiber through an industry-standard LC connector. On the receive side, the 10 Gbps optical data stream is recovered from an APD/transimpedance amplifier, retimed, and passed to an output driver. This module features a hot-pluggable XFI-compliant electrical interface. Here is a simple picture showing its working process.

function diagram of tunable xfp

Tunable XFP Optics Specifications:

– 50 GHz ITU channel spacing with intergrated wavelength locker

– Available in all C-Band Wavelengths on the DWDM ITU grid

– Available distances 40 or 80 km

– Supports 9.95Gb/s to 11.35Gb/s

– Built-in Digital Diagnostic Functions

– Tempereature Range: -5°C to 70°C

Two Transmission Distance Options: 40 km or 80 km

There are two transmission distance options for tunable XFP transceiver: 40 km or 80 km. Tunable XFP DWDM 80 km transceiver is designed for long distance optical communications up to 80 km with signaling rates up to 10Gbps. Obviously, the main difference is transmission distance. On account that 10G tunable DWDM XFP optical transceiver provides digital diagnostic functions via a 2-wire serial interface, which allows real-time access to the following operating parameters: transmitted optical power, received optical power, transceiver temperature, laser bias current and transceiver supply voltage. Therefore, the differences between 40 km tunable XFP and 80 km tunable XFP mainly lie on theses parameters. One thing to note is that 40 km tunable XFP optics is designed with high performance PIN receiver, while the 80 km tunable XFP transceiver is APD receiver. The APD (avalanche photodiode) receiver employed in these extended-reach optical transceivers has an enhanced sensitivity to allow for these extended distance fiber runs. However, it is to be noted that the input power is typically between -7 and -24 dBm. Therefore, the receiver sensitivity between these two distance has a big difference. Generally, the max receive dBm of 40 km tunable XFP transceiver is -15, while the 80 km tunable XFP transceiver is -24. And for power budget, 40 km tunable XFP is 14dB while a distance up to 80 km is up to 22dB power budget. The following table lists the main differences.

40km 80km tunable xfp

Conclusion

In general, the channel switching of tunable switches can enable the service operators to turn up circuits faster and reduce their sparing costs dramatically in today’s DWDM systems. On the other hand, tunable transceiver is usually two or four times more expensive than the regular static DWDM optical module, because a special tunable laser is applied in it. Tunable XFP transceiver provides a full C-band window covering 1528nm to 1566nm for DWDM optical networks, which meets the need of rapid increase in the volume of communications traffic from telecom carrier and operator. The tunable DWDM XFP module can replace the fixed DWDM channel XFP transceivers that are currently used, while reduce the large stock since all wavelengths can now be covered with one transceiver module.

Model Frequency Wavelength Fiber Type Connector Price on FS.COM
ONS-XC-10G-C 50 GHz 1563.86~1528.3 SMF LC $1,400
XFP-10G-CBAND-T50-ZR 50 GHz 1563.86~1528.3 SMF LC $1,400
NTK583AAE6 50 GHz 1563.86~1528.3 SMF LC $1,400
TDXFP-10GHXXX-80 50 GHz 1563.86~1528.3 SMF LC $1,400
TDXFP-10GHXXX-40 50 GHz 1563.86~1528.3 SMF LC $1,400
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Optics Solutions for Netgear ProSAFE XS712T (XS712T-100NES)

With the growth of virtualization, cloud-based services and applications like VoIP, video streaming and IP surveillance, SMB networks need to extend beyond simple reliability to higher speed and performance. As a leading provider of networking equipment for SMBs, Netgear had launched a variety of cost-effective 10GBASE-T switches including Netgear ProSAFE XS708Ev2, XS716E, XS708T, XS712T, XS716T, XS728T, XS748T and XSM7224. When looking for a lower cost and high capacity 10GBASE-T switch in SMB home/office lab environments, the Netgear ProSAFE XS712T is one of the best options. It comes in at around $1,100 at Amazon which is more budget friendly than the larger data center switches. This article will review the Netgear ProSAFE XS712T (XS712T-100NES) 10GBASE-T switch.

Netgear ProSAFE XS712T (XS712T-100NES): 12-Port 10GBASE-T Switch

Netgear ProSAFE XS712T is a powerful smart managed switch that comes with 10 dedicated 10GBASE-T RJ-45 copper ports supporting 100M/1G/10G speeds and 2 combo copper/SFP+ fiber 10G ports. The 2 combo SFP+ ports can be used as 10GASE-T ports or as SFP+ 10Gb Ethernet ports. This is an awesome feature as it allows an inexpensive SPF+ link via DAC to a 24 or 48 port 1Gb Ethernet switch for non-10Gb networking needs. All ports can automatically negotiate to the highest speed, which makes the switch ideal for environments that have a mix of Ethernet, Fast Ethernet, Gigabit Ethernet, or 10-Gigabit Ethernet devices. Cat 5e/Cat 6/Cat 6a/Cat 7 can be used to make 10G connections. Cat 6a/Cat 7 cables are recommended if the cable distance is greater than 45 meters. Besides, the smart switch can be freestanding or rack mounted in a wiring closet or equipment room. This 10G smart managed switch is purposely designed as a cost-effective way to provide 10G connections to 10G-capable servers and NAS (Network Attached Storage) systems. It also can be used at the center of a small business network or as an aggregation/access switch in a larger organization.

Netgear ProSAFE XS712T

Figure 1:  Netgear ProSAFE XS712T (Source: www.netgear.com )

Highlights of Netgear ProSAFE XS712T

In order to meet the current and future needs on virtualization, converged network and mobility, the XS712T provides comprehensive L2+/Layer 3 Lite features, such as VLAN, QoS, IGMP and MLD snooping, Static Routing, Link Aggregation, ACL binding. Besides, it has an easy-to-use Web-based management GUI which makes setup and management simple. Some of main features include:

10GBASE-T Connection

The RJ-45 copper ports of XS712T comply with IEEE 10GBASE-T standards. They support low-latency, line-rate 10G copper “Base-T” technology with backward compatibility to Fast Ethernet and Gigabit Ethernet. So it allows for a cost effective and simpler upgrade path to 10-Gigabit Ethernet. The existing Cat5/Cat5e is supported for Gigabit speeds up to 100 meters, Cat6 for 10-Gigabit speeds up to 45 meters and Cat6a/Cat7 for 10GBASE-T connection up to 100 meter.

Designed as Core Switch for SMB Network

The powerful L2+/Layer 3 Lite features make XS712T the most cost-effective core switches for SMB and virtualization environment. This switch is also a future-proofing choice with 10G bandwidth, advanced traffic management and comprehensive IPv6 support.

netgear_prosafe_xs712t_l2_10gbe_switch in SMB network

Figure 2: Netgear ProSAFE XS712T in SMB Network (Source: www.netgear.com )

Act as Aggregation Switch for Medium Sized Networks

The XS712T used as a aggregation switch has many useful purposes. It can help to resolve the congestion issue between network edge and core, which is caused by the broader adoption of Gigabit-to-the-desktop. Unlike multiple Gigabit Ethernet links, it provides greater scalability resulting in a simplified and highly efficient network infrastructure. What’s more, it can reduce cabling complexity because it can use existing cabling efficiently.

Optics Solutions for Netgear ProSAFE XS712T (XS712T-100NES)

As mentioned above, The Netgear ProSAFE XS712T smart switch provides 12 twisted-pair ports that support nonstop 100M/1000M/10G networks. The switch also has two built-in SFP+ GBIC combo slots that support 1000M and 10G optical modules. Using these Gigabit slots, 100M/1000M/10G copper and 1000M/10G fiber connectivity can create high-speed connections to a server or network backbone. So 1000BASE-T SFP copper transceiver, 1000BASE SFP and 10G SFP+ transceivers are suitable for this switch. The following table lists the compatible transceivers and optic cables from FS.COM.

MFG PART# Description
AGM734 NETGEAR AGM734 Compatible 1000BASE-T SFP Copper 100m Transceiver, RJ-45 Interface
AGM731F NETGEAR Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver, LC Interface
AGM732F NETGEAR Compatible 1000BASE-LX SFP 1310nm 10km DOM Transceiver, LC Interface
AXM761 NETGEAR Compatible 10GBASE-SR SFP+ 850nm 300m DOM Transceiver, LC Interface
AXM762 NETGEAR Compatible 10GBASE-LR SFP+ 1310nm 10km DOM Transceiver, LC Interface
AXM763 NETGEAR Compatible 10GBASE-LRM SFP+ 1310nm 220m DOM Transceiver, LC Interface
AXM764 NETGEAR Compatible 10GBASE-LR Lite SFP+ 1310nm 2km DOM Transceiver, LC Interface
AXC761 1m NETGEAR Compatible 10G SFP+ Passive DAC
AXC763 3m NETGEAR Compatible 10G SFP+ Passive DAC
Conclusion

The Netgear XS712T (XS712T-100NES) provides a solid cost-effective solution especially for those with SMB home/ office lab environments. If you are seeking for afforable 10GBASE-T switch for your home lab, the XS712T can be taken into consideration. What’s more, the compatible fiber transceivers and cables can be found in many third party vendors with reasonable prices, such as cablestogo, fluxlight, smartoptics, FS.COM, and etc. You have a lot of choices to save money.

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Why to Choose Pre-terminated Copper Trunk Cable?

For data center and enterprise deployments, pre-terminated copper trunk cable is a wonderful choice to achieve simple and quick installation. It can fit most patch panel port densities and improve better airflow and cable management. With the right upfront panning and coordination, these copper trunk cables can offer major benefits over terminating twisted-pair cables in the field. This article will take you to explore the pre-terminated copper trunk cable.

cat6 pre-terminated trunk cable

What Is Pre-terminated Copper Trunk Cable?

Pre-terminated copper trunk cable is a kind of cable which has gone through the same procedures with other cables. But their connectors have already been terminated, properly polished, and the entire cable assembly tested on either both or one end in factory. Copper trunk cables are typically comprised of bundles of 6, 8, or 12. Since they are bundled together, there is no need to worry about cable mess. Pre-terminated copper trunk cables provide a quick “plug-and-play” solution for links between switches, servers, patch panels and zone distribution areas in the data center.

Advantages of Pre-terminated Copper Trunk Cable
  • Increase speed of deployment

Compared to field terminations, pre-terminated cabling can reduce installation time by up to 75 percent.

  • Improve cable management

Pre-terminated solutions are ideal for data centers, which are designed with consistent distances between cabinets and rows.

  • Remove the need for transmission performance testing

For pre-terminated copper trunk cable, the transmission testing is performed by manufacturer before shipment.

  • Avoid time-wasting rework

Pre-terminated copper trunk cables are terminated in factory, and many of them are provided in a cassette format. This format allows installers to “plug and play” multiple connections with one cassette, which reduce installation time obviously.

copper-patch-cable-and-pre-terminated-copper-trunk-cable

Termination Types of Trunk Cable

When selecting copper trunk cables, to choose a right termination type is a very important step, which is based on the layout of the data center or telecommunications room. it’s worth noting that the accessibility of the active equipment (including servers, switches, etc.) and the proper patching solution should be considered during the process of selection. Generally, there are four common termination types: jack-to-jack, jack-to-plug, plug-to-plug and jack-to-open. Different types have different requirements for installation. The following will introduce these four termination types respectively:

Jack to Jack: This termination type is typically used in cabinet-to-cabinet permanent link trunk. In general, it is installed into empty patch panels on both ends in common interconnect and cross connect architectures. The use of patch cords is used to complete the connectivity between the active equipment and the physical layer.

Jack to Plug: Typically used for in-cabinet or cabinet-to-cabinet equipment cord harnesses, the jack-to-plug type is installed into the patch panels on one end and switch ports on the other end for switch port replication applications, eliminating one cross-connect point by having the cable plug directly into the active equipment.

Plug to plug: Typically used to make a direct connection between active equipment, e.g. server to switch, eliminating cross-connect capabilities. It can also be used in an open-space work area as a bundled patch cord group.

Jack to Open: This type is similar to jack-to-jack configuration, but one end should be cut to length and field-terminated to a target termination place, such as 110-style panel, patch panel or wall plate. Field testing of the drops is necessary after the cables have been terminated in this case.

Deployment Considerations
1. Copper Cable Type

Copper trunk cables using Cat5, Cat5e, Cat6 and Cat7 cables are all available in the market.

2. Cable Count

The most commonly used copper cables usually have 6 or 12 cables in one bound. Higher or lower cable counts are also available.

3. Breakout Length

Breakout length refers to the dimension from the end of the braided sleeve to connectors at the end of the cables. This dimension is part of the overall length, not in addition to the length measurement. The primary consideration for breakout length is to have flexibility to route the cables as needed.

4.  Proper Length

For pre-terminated copper trunk cable assemblies, length is a very important parameter to be ordered which help users to achieve the best performance.

length

5. PVC VS. LSZH

You must consider the fire ratings of materials to minimize danger in the event of a fire. Most data centers are a riser environment, where airflow is not a consideration. The jacket of cables is an important point when selecting pre-teminated copper trunk cables. The purpose of the jacket is to protect the wiring from physical damage, moisture, ozone and ultraviolet rays. PVC is made of polyvinyl chloride that gives off heavy black smoke, hydrochloric acid and other toxic gases when it burns. While LSZH has a flame-resistant jacket that doesn’t emit toxic fumes even if it burns. Both cables are excellent in performance, so it depends on the situation whether you choose LSZH or PVC.

FS Pre-terminated Copper Trunk Cable Solution

FS.COM provides a lot of Cat5e/Cat6/Cat7 pre-terminated trunk cable with plug-to-plug or jack-to-jack termination type. And FS.COM copper trunks include a braided mesh sleeve whose properties match that of the cable jacket. This ensures that the binding material does not degrade the suitability of the product in a plenum environment. The following table lists the main solutions.

FS P/N Cable Type Cable Color Termination Type Cable Rating Cable Count
CAT5E-U12PPBE-3M Cat5e Unshielded Blue Plug to Plug LSZH 12
CAT6-U06JJBE-10M Cat6 Unshielded Blue Jack to Jack LSZH 6
CAT6-U6PPBE-3M Cat6 Unshielded Blue Plug to Plug PVC CMR 6
CAT6-U06HQJJ-10M Cat6 Unshielded Blue Jack to Jack PVC CMR 6
CAT6A-S6PPOW-5M Cat6a Shielded Off-White Plug to Plug PVC CMR 6
Summary

Pre-terminated copper trunk cable assemblies are an ideal solution for data center infrastructures and backbone applications where cable distances are reasonably predictable and can be easily determined. They play an important role in reducing installation time and cost, helping you deploy a reliable, easy-to-use copper trunking system.

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Transceiver Optics and Cable Options for HP 5820AF-24XG Switch (JG219B)

The requirements of virtualization and cloud trends are changing enterprise business environments, high port density, high throughput and very low latency are bedrock requirements in the data center. The HP 5820 switch series are built to meet these requirements, and help enterprises to reduce operating costs and build agile and resilient enterprises. As a member in the family of HP 5820 switch series, the HP 5820AF-24XG switch is a managed L3 switch supporting Gigabit Ethernet and 10 Gigabit Ethernet SFP+ optics and cables. It can serve as a leaf or access top-of-rack 10 Gigabit Ethernet switch in data centers. This article will provide the optical solutions such as fiber optic transceivers and direct attach cables that are supported by HP 5820AF-24XG switch.

HP 5820AF-24XG switch

HP 5820AF 24XG Switch JG219B

In the family of HP 5820 switch series, HP 5820AF-24XG switch (JG219B ) thus obtains several features of the series. It provides a versatile, high-performance and 1/10GbE top-of-rack data center switch architecture with deployment flexibility. The switch can be deployed for data center top-of-rack server access; or as high-performance Layer 3, 10GbE aggregation switches in campus and data center networks. JG219B offers Gigabit and 10 Gigabit connectivity. It includes 24 fixed 1000/10000 SFP+ ports and 4 RJ-45 autosensing 10/100/1000 ports. The total switching capacity of this switch can reach up to 484 Gbps supporting as much as 363mpps throughput.

HP-JG219B

Fiber Optic Transceivers and Direct Attach Cables for HP 5820AF 24XG Switch

As stated above, the HP 5820AF 24XG switch is available with 1 GbE and 10 GbE data links. The SFP transceivers, SFP+ transceivers, 10G SFP+ to SFP+ direct attach copper cables and 40G QSFP+ to 4x10G SFP+ direct attach copper breakout cables for HP 5820AF 24XG switch are shown in the following tables.

SFP Transceivers
MFG PART# Description Cable Type Interface
JD061A HP Compatible 1000BASE-LH SFP 1310nm 40km DOM Transceiver, $ 14.00 SMF LC Duplex
JD062A HP Compatible 1000BASE-LH SFP 1550nm 40km DOM Transceiver, $ 24.00 SMF LC Duplex
JD063B HP Compatible 1000BASE-LH SFP 1550nm 70km DOM Transceiver, $ 24.00 SMF LC Duplex
JD089B HP Compatible 1000BASE-T SFP Copper RJ45 100m Transceiver, $ 16.00 Cat 5 RJ45
JD118B HP Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver, $ 10.00 MMF LC Duplex
JD119B HP Compatible 1000BASE-LX SFP 1310nm 10km (SMF Distance) DOM Transceiver, $ 12.00 SMF/MMF LC Duplex
SFP+ Transceivers
MFG PART# Description Cable Type Interface
JD092B HP Compatible 10GBASE-SR SFP+ 850nm 300m DOM Transceiver, $ 16.00 MMF LC Duplex
JD093B HP Compatible 10GBASE-LRM SFP+ 1310nm 220m DOM Transceiver, $ 34.00 MMF LC Duplex
JD094B HP Compatible 10GBASE-LR SFP+ 1310nm 10km DOM Transceiver, $ 34.00 SMF LC Duplex
JG234A HP Compatible 10GBASE-ER SFP+ 1550nm 40km DOM Transceiver, $ 149.00 SMF LC Duplex
10G SFP+ to SFP+ Direct Attach Copper Cables
MFG PART# Description
JD095C 0.65m HP JD095C Compatible 10G SFP+ Passive DAC, $ 22.00
JD096C 1.2m HP Compatible 10G SFP+ Passive DAC,$ 23.00
JD097C 3m HP Compatible 10G SFP+ Passive DAC, $ 29.00
JG081C 5m HP Compatible 10G SFP+ Passive DAC, $ 56.00
40G QSFP+ to 4x10G SFP+ Direct Attach Copper Breakout Cables
MFG PART# Description
JG329A 1m HP Compatible QSFP+ to 4SFP+ Passive Breakout DAC, $ 78.00
JG330A 3m HP Compatible QSFP+ to 4SFP+ Passive Breakout DAC, $ 91.00
JG331A 5m HP Compatible QSFP+ to 4SFP+ Passive Breakout DAC, $ 120.00
Conclusion

HP 5820AF 24XG switch (JG219B) provides a simplified network architecture designed for scalability and reliability. It is a good option for 1 GbE and 10 GbE networks over buildings, campus and data centers. The fiber optic transceivers and direct attach cables for the HP 5820AF 24XG switch are always available at FS.COM.

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How to Choose a Suitable Network Switch?

A network switch is a small hardware device that centralizes communications among multiple connected devices within one local area network (LAN). Network switches come in different sizes, features and functions, so choosing a switch to match a particular network sometimes constitutes a daunting task. This blog will give you a few useful things to consider when choosing the appropriate switch for a layer in a particular network.

network switch

Network Switch Technology

While switching capabilities exist for several kinds of networks, including Ethernet, Fibre Channel, RapidIO, ATM, ITU-T G.hn and 802.11, network switch can operate at one or more layers of the OSI model. Switches provide multiple advantages in network designs. All switches provide the basic traffic filtering functions, which improves network bandwidth. Besides, the internal switching circuits allow traffic flows to simultaneously occur between multiple ports. Currently, mainstream network switches support Gigabit Ethernet speeds per switch port, but high-performance switches in data centers generally support 10 Gbps per link. Different models of network switches support varying numbers of connected devices. Home network switches provide 4/8 connection for Ethernet devices, while SMB switches typically support between 32 and 128 connections.

Considerations for Choosing the Suitable Network Switch

Careful planning before purchasing a switch will save you money. At the same time, it can help you ensure the equipment has the functionality that you organization is needed, or the switches can expand their capabilities as your requirements change and grow. Here are some suggestions you can use to help guide your switch purchase.

Connection Requirements

Connection requirements are a good place to start, since they usually dictate what types of switches will be needed, and they can affect pricing dramatically. Here are something you need to consider in advance:

1. Consider the number of users that your network will have to support

2. Consider your basic network infrastructure

3. Determine the network needs of the users (Fast Ethernet or Gigabit Ethernet)

4. Choose the role of the switch (core switch, distribution switch, access switch)

5. Pick a vendor and/or company (for example: Cisco, Juniper, HP, Dell, Arista, Brocade, FS.COM)

Number of ports

The number of users and the basic network infrastructure determine the number of ports. Common numbers of ports on network switches are 5, 8, 10, 24, and 48 ports. If you only have 5 or 6 users, then a small 8 port switch will probably be enough for your needs. Number of ports is one of the biggest factors in the cost of a switch, so if you buy a switch that only supports the number of users that you will have, you will likely save a fair amount of money.

FS network switch

Port Speeds and Types

Fixed switches come in Fast Ethernet and Gigabit Ethernet. Fast Ethernet allows up to 100 Mb/s of traffic per switch port while Gigabit Ethernet allows up to 1000 Mb/s of traffic per switch port. These ports may be a combination of SFP/SFP+ slots for fiber connectivity, but more commonly they are copper ports with RJ-45 connectors on the front, allowing for distances up to 100 meters. With Fiber SFP modules, you can go distances up to 40 kilometers. Currently, Gigabit Ethernet is the most popular interface speed though Fast Ethernet is still widely used, especially in price-sensitive environments.

Link Aggregation

If you have a 24-port switch, with all its ports capable of running at gigabit speeds, you could generate up to 24 Gb/s of network traffic. If the switch is connected to the rest of the network by a single network cable, it can only forward 1 Gb/s of the data to the rest of that network. Due to the contention for bandwidth, the data would forward more slowly. That results in 1 out of 24 wire speed available to each of the 24 devices connected to the switch. Therefore, the more ports you have on a switch to support bandwidth aggregation, the more speed you have on your network traffic.

Performance

Core Layer Switches: These types of switches are routed at the core layer of a topology, which is the high-speed backbone of the network and requires switches that can handle very high forwarding rates. The switch that operates in this area also needs to support link aggregation to ensure adequate bandwidth coming into the core from the distribution layer switches. Because of the high workload carried by core layer switches, they tend to operate hotter than access or distribution layer switches. Virtually, core layer switches have the ability to swap cooling fans without having to turn the switch off.

Distribution Layer Switches: Distribution layer switches plays a very important role on the network. They collect the data from all the access layer switches and forward it to the core layer switches. Distribution layer switches provides advanced security policies that can be applied to network traffic using Access Control Lists (ACL). This type of security allows the switch to prevent certain types of traffic and permit others.

Access Layer Switches: Access layer switches facilitate the connection of end node devices to the network. For this reason, they need to support features such as port security, VLANs, Fast Ethernet/Gigabit Ethernet, Power over Internet, and link aggregation. Port security allows the switch to decide how many or what type of devices are permitted to connect to the switch.

The Three-Layered Hierarchical Model

Power requirements

At any layer, a modern switch may implement power over Ethernet (PoE), which avoids the need for attached devices, such as a VoIP phone or wireless access point, to have a separate power supply. Since switches can have redundant power circuits connected to uninterruptible power supplies, the connected device can continue operating even when regular office power fails. Another characteristic you consider when choosing a switch is PoE. This is the ability of the switch to deliver power to a device over the existing Ethernet cabling. To find the switch that is right for you, all you need to do is choose a switch according to your power needs. When connecting to desktops which do not require PoE switches, the non-PoE switches are a more cost-effective option.

Future Growth: Stackable VS. Standalone

As the network grows, you will need more switches to provide network connectivity to the growing number of devices in the network. When using standalone switches, each switch is managed, troubleshot, and configured as an individual entity. In contrast, stackable switches provide a way to simplify and increase the availability of the network. With a true stackable switch, you can connect the stack members in a ring. If a port or cable fails, the stack will automatically route around that failure, many times at microsecond speeds. You can also add or subtract stack members and have it automatically recognized and added into the stack.

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Managed Switch VS. Unmanaged Switch: Which to Choose?

Switches are devices used in connecting multiple devices together on a Local Area Network (LAN). In terms of networking, the switch would serve as a controller, which allows the various devices to share information. Switches can be used in the home, a small office or at a location where multiple machines need to be hooked up. There are two basic kinds of switches: managed switches and unmanaged switches. The key difference between them lies in the fact that a managed switch can be configured and it can prioritize LAN traffic so that the most important information gets through. On the other hand, an unmanaged switch behaves like a “plug and play” device, which cannot be configured and simply allows the devices to communicate with one another. This blog will compare the difference between managed switch and unmanaged switch, and why would choose one over the other?

managed switch vs. unmanaged switch

Managed Switch

A managed switch is a device that can be configured. This capability provides greater network flexibility because the switch can be monitored and adjusted locally or remotely. With a managed switch, you have control over network traffic and network access. Managed switches are designed for intense workloads, high amounts of traffic and deployments where custom configurations are a necessity. When looking at managed switches, there are two types available: smart switches and fully managed switches. Smart switches have a limited number of options for configuration and are ideal for home and office use. Fully managed switches are targeted at servers and enterprises, offering a wide array of tools and features to manage the immediate network.

FS Managed Switch

Unmanaged Switch

Unmanaged switches are basic plug-and-play switches with no remote configuration, management, or monitoring options, although many can be locally monitored and configured via LED indicators and DIP switches. These inexpensive switches are typically used in small networks, such as home, SOHO or small businesses. In scenarios where the network traffic is light, all that is required is a way for the data to pass from one device to another. In this case there is no need for prioritizing the packets, as all the traffic will flow unimpeded. An unmanaged switch will fill this need without issues.

The Managed Switch Will Retain Predominance as the Switch of Choice

Managed and unmanaged switches can maintain stability through Spanning Tree Protocol (STP). This protocol can prevent your network from looping endlessly, because it can search for the disconnected device. However, the managed switch is still the best solution for long-range usability and network performance. And it will cover the trends in the near future.

benefits of managed switches

Benefits of Managed Switches

Network Redundancy: Managed switches incorporate Spanning Tree Protocol (STP) to provide path redundancy in the network. STP provides redundant paths but prevents loops that are created by multiple active paths between switches, which makes job for a network administrator easier and also proves more profitable for a business.

Remote management: Managed switches use protocols such as or Simple Network Management Protocol (SNMP) for monitoring the devices on the network. SNMP helps to collect, organize and modify management information between network devices. So IT administrators can read the SNMP data, and then monitor the performance of the network from a remote location, and detect and repair network problems from a central location without having to physically inspect the switches and devices.

Security and Resilience: Managed switches enable complete control of data, bandwidth and traffic control over the Ethernet network. You can setup additional firewall rules directly into the switch. And managed switches support protocols which allow operators to restrict/control port access.

SFP: The benefit of having multi-rate SFP slots is the network flexible expansion possibility, which allows the user to be able to use 100Mbps and 1Gbps SFP modules for either multi or single-mode fibre optic (or copper) as needed. If requirements change, the SFP module can be replaced and easily protect your switch investment.

Support multiple VLAN as per requirement: Managed switches allow for the creation of multiple VLANs where an 8-port switch functionally can turn into two 4-port switches.

Prioritise bandwidth for data subsets: The switches are able to prioritise one type of traffic over another allowing more bandwidth to be allocated through the network.

The disadvantages of unmanaged switches
  • Open ports on unmanaged switches are a security risk
  • No resiliency = higher downtime
  • Unmanaged switches cannot prioritize traffic
  • Unmanaged switches cannot segment network traffic
  • Unmanaged switches have limited or no tools for monitoring network activity or performance
Conclusion

For end users, network visibility and control can be highly valued in their plants and they are willing to pay for it. Although managed switches are costlier than unmanaged switches, managed switches definitely have more benefits and consistent network performance. When the network requirements may be expanded or better control and monitoring over network traffic is needed, managed switches may be considered.

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Why Choose PoE Switch for Your Network?

PoE is a technology which enables electrical power to pass over Ethernet cable at distances up to 100m. It is developed to reduce the cost of network planning, cabling and installation. PoE is primarily used for low-powered terminal devices, typically VoIP phones, IP cameras and wireless access points, but it can also provide a redundant power supply for switches to increase the network’s reliability. Until recently, the PoE switches are commonly found in industrial Ethernet network deployments.

24-Port-Managed-Switches

802.3af and 802.3at PoE Standards

The IEEE is responsible for creating PoE standards. Currently, there are two PoE standards available: 802.3af and 802.3at. The 802.3af standard supports 15.44 watts of power. But even though 802.3af powered sourcing equipment (PSE) are able to transmit 15.44 watts of power, powered devices (PDs) can only reliably receive 12.95 watts of power due to power dissipation. In 2009, IEEE introduced the higher powered 802.3at standard, which is known as PoE+. The standard supports 30 watts of power, but similar to the 802.3af standard, power dissipation causes powered devices to receive slightly lower amounts of power, specifically 25.5 watts of power. The IEEE Committee is now developing a new standard (IEEE802.3bt) which will power up 70+ Watt loads.

PoE Power System

A PoE system comprises of four pieces of equipment: power sourcing equipment (PSE), a device which supplies power to the rest of the system; powered device (PD), a device which receives power from the PSE device; Ethernet cable, the power and data transmission medium of a PoE system; and power supply. The figure below shows the basic principle of a PoE system.

PoE System

As PoE changes to meet growing technology and application requirements, it is being classified by classes. PoE classes ensure efficient power distribution by specifying the amount of power that a PD will require. PDs that require less power than the lowest PoE standard receive a low-ranking power classification and allows the PSE to allocate the surplus amount of power to other connected devices. PoE systems provide high reliability, convenience and low cost. The available 25 watts per port is sufficient to power many common applications. Since PoE systems are classified as low-power systems, they need not be installed nor maintained by licensed personnel.

PoE Switch – Allotting Sufficient PoE Power to Your Network

A PoE switch is a dedicated device that contains multiple Ethernet ports to provide power and network communications to IP cameras. At the same time, it is a kind of PSEs to allocate power to the desired amount of connected powered devices. For example, S1400-24T4F gigabit switch is an 802.3af PoE compliant PSE that boasts a total PoE power budget of 400 watts. There is 25% redundant power peak, which can fully allocate IEEE802.3af PD devices, and half allocate the IEEE802.3at PD devices, such as IP cameras, VoIP phones or wireless access points. It can automatically adjust energy consumption according to the ports’ actual flow, dynamically sense idle periods between traffic bursts and quickly switch the interfaces into a low power idle mode, in result to save 30% power dissipation. By the way, when you utilize PoE managed switches, installation of controllers and access points is greatly simplified. You won’t need to provide separate power cables or install plugs near Wi-Fi locations. You’d simply run your Cat5e or Cat6 cable from your hotspot to your switch. All in all, PoE switch is the best option for SMB or entry-level enterprise solution which demands industrial surveillance, IP phone, IP camera or wireless applications.

PoE Switch

Summary

PoE switch provides the availability of critical business applications, protects the sensitive information, and optimizes the network bandwidth to deliver information and applications more effectively. It is the best option for SMB network. Before ordering your PoE switch, you should consider what your goals are for the network. In many cases, future-proofing with a better PoE switch may actually be a much better investment.

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