Fiber Optical Networking

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. SFP 40 km SFP 40 km transceiver is designed for highly reliable fiber optic network links up to...

With the increasing demands for higher capacity, more diversity and more personalization of services, the capacity and versatility of access networks needs to be expanded. Passive optical network (PON), as a major technology of FTTH, offers point-to-multipoint (P2MP) network access with lower installation and maintenance costs. EPON (Ethernet PON) and GPON (Gigabit PON) are popular versions of PONs at present. The related technologies keep developing and meanwhile the market of PON components keep growing. PON transceiver (EPON SFP or GPON SFP) is an essential part of PON system, in which a single fiber from a central office optical network unit (ONU) is connected to optical network terminals (ONTs) or optical network units (ONUs) at costomer premises. EPON SFP vs. GPON SFP is today’s main subject matter of this paper. Passive Optical Network (PON) Passive optical network (PON) is a form of fiber-optic access network. As the leading technology being used in FTTx (FTTH) de...

Due to the increased requirements for IP surveillance networks, the appearance of PoE switches give you an easy way to add PoE devices to the network. They are ideal for small business networks that need to inexpensively use PoE to deploy wireless access points, VoIP phones and IP cameras. The PoE switch models are available with 4, 8, 16, 24 or 48 ports, although other variants are also available. 24 port PoE switch is the most prevalent variant on the market. So why your network needs a 24-port PoE switch and how can network benefit from deploying it? This article explains it in detail. Why Your Network Needs A 24-Port PoE Switch? When choosing an Ethernet switch, the most important is to check whether the numbers of ports on the switch are enough to connect all your devices. The same is true when choosing PoE switch . PoE ports are flexible to connect with Cat5e cable without additional settings. Generally, the PoE switch has the uplink ports, which allow long distance...

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. 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 DW...

Optical transceivers play a key role in handling all storage, data, voice and video traffic whether linking rack to rack, bottom to top of rack, data center to data center or enterprise networks to network. A range of flexible fiber optic transceiver modules cover all of network needs, such as SFP, SFP+, QSFP, QSFP28, CFP, etc. But for 10G DWDM tunable SFP+, many people might find themselves in the mire. When I first heard about this tunable transceiver, I thought that it would definitely bring revolutionary change to future metro Ethernet and optical transport networks with its important practical value for flexibly selecting working wavelength. So this article will unveil all of the things about tunable SFP+ optical transceiver. About 10G DWDM Tunable SFP+ As the demand for great traffic capacity keeps growing, more optical transceivers of different wavelengths are needed. So tunable transceivers are recent innovations in DWDM transport systems. DWDM tunable transceiver...

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 ...

In the OSI model, we know that traditional network switches operate at Layer 2 while network routers operate at Layer 3. Besides, switches are understood to be forward traffic based on MAC address, while routers perform the forwarding based on IP address. Layer 3 switches have a lot in common with traditional routers: they can also support the same routing protocols, inspect incoming packets and make dynamic routing decisions based on the source and destination addresses inside. For this reason, many networking beginners are puzzled over the definition and purpose of a Layer 3 switch. So what is on earth Layer 3 switch and how is it different from router? Layer 3 Switch Layer 3 switch is also called multilayer switch. It is a specialized hardware device used in network routing, which is conceived as a technology to improve network routing performance on large local area networks (LANs) like corporate intranets. A Layer 3 switch is both a switch and a router. So Layer 3 switch i...