Differences Between SFP, BiDi SFP and Compact SFP

As we know, a common SFP transceiver is generally with two ports, one is TX port which is used to transmit the signal, and the other one is RX port which is used to receive signals. Unlike common SFP transceiver, BiDi SFP transceiver is only with one port which uses an integral WDM coupler to transmit and receive signals over a single strand fiber. In fact, the compact SFP is a 2-channel BiDi SFP, which integrates two BiDi SFP in one SFP module. Therefore, a compact SFP is also with two ports as the common SFP.
Differences-Between-SFP-BiDi-SFP-and-Compact-SFP1-624x341
SFP, BiDi SFP and Compact SFP Connection Methods
All SFP transceivers must be used in pairs. For common SFPs, we should connect the two SFPs which have the same wavelength together. For example, we use a 850nm SFP at one end, then we must use a 850nm SFP on the other end (shown in the figure below).
common-SFP-624x352
For BiDi SFP, since it transmits and receives signals with different wavelengths, we should connect the two BiDi SFPs which have the opposite wavelength together. For example, we use a 1310nm-TX/1490nm-RX BiDi SFP at one end, then we must use a 1490nm-TX/1310nm-RX BiDi SFP on the other end (shown in the figure below).
BiDi-SFP-624x352
The compact SFP (GLC-2BX-D) usually uses 1490nm to transmit signal and the 1310nm to receive signal. Therefore, the compact SFP is always connected to two 1310nm-TX/1490nm-RX BiDi SFP over two single-mode fibers (shown in the figure below).
Compact-SFP1-624x352
BiDi SFP and Compact SFP Applications
At present, the BiDi SFP is mostly used in FTTx deployment P2P (point-to-point) connection. A FTTH/FTTB active Ethernet network consists of a central office (CO) connecting to the customer premises equipment (CPE). Active Ethernet networks use a P2P architecture in which each end customer is connected to the CO on a dedicated fiber. BiDi SFP allows a bi-directional communication on a single fiber by using wavelength multiplexing (WDM), which makes CO and CPE connection more simple. Compact SFP enormously increases CO port density by combining two single fiber transceivers into one SFP form factor. In addition, the compact SFP will significantly reduce the overall power consumption at the CO side.
Compact-SFP-FTTx-624x243
FS.COM BiDi and Compact SFP Sloutions
FS.COM provides a variety of BiDi SFPs. They can support different data rate and support transmission distance up to max 120 km that can meet the demands of today’s fiber services for carriers and enterprises.
FS SKU#Description
SKU00686G1000BASE-BX SFP 1310nm-TX/1490nm-RX 10km Transceiver
SKU00687G1000BASE-BX SFP 1490nm-TX/1310nm-RX 10km Transceiver
SKU00684G1000BASE-BX SFP 1310nm-TX/1550nm-RX 10km Transceiver
SKU00685G1000BASE-BX SFP 1550nm-TX/1310nm-RX 10km Transceiver
SKU10607Z1000BASE-BX compact SFP 1490nm-TX/1310nm-RX 10km Transceiver

评论

发表评论

此博客中的热门博文

What Is VLAN Switch and Why Do We Need It?

图片
VLAN or virtual LAN is a type of LAN that is defined to map workstations based on everything except for geographic location. It develops when the network has increased in size and complexity, and many companies require more access ports or a network design. Basically, it’s a networking technology which allows the network to be segmented logically without geographic restrictions. But how much do you know about VLAN switch? What Is  VLAN Switch? VLAN switch is built on the fiber optic switch  of LAN, which realizes the division and management of logical working group as a software. As defined in IEEE standard 802.1Q, VLAN switch can provide a way to transform one network into multiple broadcast domains. And each broadcast domain is usually matched with IP subnet boundaries, so that each subnet has its own VLAN. Therefore, users can obtain various wired LANs for different purposes that are co-existed physically, which means you don’t need to buy additional hardware or c...
阅读全文

Differentiate the 3 Technologies: Switch Stacking vs Cascading vs Clustering

图片
When we have more than one switches on hand we often seek to a better way in making use of them and managing them. There are mainly three technologies that we might use when we interconnect or combine several switches together, which are switch stacking, cascading and clustering. For many people that firstly get in touch with these terms, they can’t figure out the differences between them. Some discussions of the switch stacking versus switch clustering and switch stacking versus switch cascading have been put forward, but a comprehensive comparison between them has not been made. So this post is a discussion of switch stacking vs cascading vs clustering. Switch Stacking vs Cascading vs Clustering The comparison of switch stacking, cascading and clustering should be based on knowing the meaning of these technologies. So firstly we will see what switch stacking, cascading and cluster are. What Are Switch Stacking, Cascading and Clustering? Switch stack...
阅读全文

Nylon Zip Ties vs Hook-&-Loop (Velcro®) Ties

图片
The confinement system is the last but critical part of the entire cable management systems. Cable tie plays a very important role in this part. However, there are various types of cable ties in the market. Which one is better? Since nylon zip ties and hook-&-loop (Velcro®) ties are most common and controversial. This tutorial will compare these two types of cable ties in details. Overview of Cable Ties Cable ties are cheap and simple components used in cable confinement system. They are usually the last measure to ensure the cable managed in order. Cable ties are available in a variety of sizes and materials for use on different applications with different requirements. In addition, there are various of color options for cable ties. These color codes help users to manage the cabling and achieve easy troubleshooting. The most commonly used formats of cable ties are nylon zip ties and hook-&-loop (Velcro®) ties, as the Figure 1 & 2 shown: Figure 1. Drawin...
阅读全文