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FIBER OPTIC CABLING SOLUTIONS THE LARGEST SOLUTIONS OF PRE-TERMINATED FIBER OPTICS, INCLUDING MULTIMODE AND SINGLE-MODE PATCH CORDS, MTP/MPO FIBER TRUNKS AND HARNESSES, PLUG-N-PLAY MODULES/CASSETTES AND FIBER ENCLOSURES. Menu Skip to content * home * Fiber Optic Transceivers * SFP Transceiver * SFP+ Transceiver * QSFP+ Transceiver * 100G Transceiver * Switch & Transceiver * Transceivers Common Sense * Cabling Solutions * MPO/MTP solutions * Single Mode Fiber (SMF) * Multi Mode Fiber (MMF) * Fiber Patch Cord * Bulk Fiber Cable * Cat5/Cat6/Cat7 Network Cable * Optical Solutions * CWDM & DWDM Solution * Fiber Media Converter * Passive Optical Network * Optics Common Sense * Cable Management * Fiber Patch Panel * Fiber Optic Enclosures * Fiber Adapter Panels * Fiber Optical Faceplate * Tools & Testers * Fiber Optic Testers * Fiber Optic Tools * Fiber Optic Splicing GIGABIT SLOTS: SFP PORT VS. RJ45 PORT VS. GBIC PORT FacebookTwitterLinkedInRedditTumblr In Gigabit Ethernet applications, either SFP port, RJ45 port or GBIC port is used in different Gigabit devices, such as switches, routers, servers and storages. And some latest wireless access points (APs) are also equipped with SFP port. Since all these three port types only support 1Gbit and do not go any higher, why are they created instead of using only one type? SFP PORT VS. GBIC PORT: AN IMPROVEMENT IN DIMENSION SFP port and GBIC port can be found in a variety of equipment, including Ethernet switches, routers, network interface cards, servers, etc. Today most Ethernet switches are designed with as least one or two Gigabit SFP uplink slots. What is SFP port? As the name implies, SFP port is intended for taking in SFP (mini-GBIC) fiber modules with small form-factor (SFF) connectors, while GBIC port is for accepting GBIC modules. The two types of ports can provide the same data rates and same distances in Gigabit applications, but the same number of SFP ports uses less space than that of GBIC ports. Since they have the equal functionality, SFP has gradually taken the place of the older GBIC in Gigabit networking for space-saving and economical reasons. The table below is a comparison of SFP port vs. GBIC port. Parameter SFP Port GBIC Port Supported Optical Modules SFP transceiver (single-mode/multimode, simple/duplex, CWDM/DWDM) GBIC transceiver (single-mode/multimode, simple/duplex, CWDM/DWDM) Transceiver Receptacle Type LC, RJ45 SC, RJ45 Supported Standards 1000BASE-T, 1000BASE-SX, 1000BASE-LX, 1000BASE-LX10, 1000BASE-LX/LH, 1000BASE-LH, 1000BASE-EX, 1000BASE-ZX, 1000BASE-BX, 1000BASE-CWDM, 1000BASE-DWDM. Supported Distances Up to 100 m, 300 m, 2 km, 10 km, 20 km, 40 km, 80 km, 100 km, 150 km. Module DOM Function Modules support digital optical monitoring (DOM) function, providing real-time monitoring of transceiver’s operation temperature, optical input, optical output, laser bias current and supply voltage. If you want to know more about the SFP types that the SFP port support and their detailed specifications, such as wavelengths and distances, you can read: How Many Types of SFP Transceivers Do You Know. SFP VS. RJ45 PORT: DISTANCE MAKES DIFFERENCE The RJ45 ports in Gigabit networking devices follow the 1000BASE-T Ethernet standard. They only support twisted pairs for network connections, and the distance is limited to 100 m (330 feet). RJ45 port uses Category 5/5e/6 and higher level copper Ethernet cables for 1Gbit transmission. Compared with switch using only RJ45 port, SFP port switch supports more types of communication cables and longer reaches of links. Here are the differences between SFP vs. RJ45 port. Parameter SFP Port RJ45 Port Connection Cable Types Multimode fiber cable, single-mode fiber cable, twisted pairs (Cat5, Cat6 or higher). Twisted pairs (Cat5, Cat6 or higher). Max. Transmission Distance MMF (550 m), SMF (150 km), Cat5 (100 m) 100 m (330 ft) Data Rate 1000 Mbps (1G) 1000 Mbps (1G) Since most end-points at the customer’s are still using RJ45 port, in order to retaining the convenience of RJ45 port while providing the advantage of SFP network to customers, some switches include combo SFP/RJ45 ports. So users can choose to utilize either the SFP port or the RJ45 port at a time for short-distance connections. WHAT IS DUAL-RATE SFP PORT? Unlike the combo SFP/RJ45 port which is actually a link shared by two different ports, a dual-rate SFP port is one single SFP slot that can be configured to support two different data rates. Generally a dual-rate SFP slot can set to be either 1G mode or 10G mode, i.e., an SFP module or an SFP+ module can be installed in it. But the actual data rate of the transmission depends on the mode being settled and the transceiver module being used. There are several cases: * The dual-rate SFP slot is 10G activated, and an SFP+ module is installed; the interface is in 10G mode. * The port is 10G activated, but an SFP module is installed; the interface is in 1G mode. * The port is not 10G activated, but an SFP+ module is installed; the interface will be link down state. * The port is not 10G activated, and an SFP module is installed; the interface is in 1G mode. SUMMARY The three port types—SFP port, RJ45 port and GBIC port—are used in different networking equipment. The SFP port is now more commonly used than GBIC port since the former one provides the same function and is more compact. When SFP port vs. RJ45 port, SFP port supports connectivity through varieties of fiber cables and the copper twisted pairs, and a wide range of link distances, but RJ45 port accepts only twisted pair cables and a shorter distance. Since every thing has both two sides, it is not always the best to choose SFP slot. The two articles: GBIC vs SFP: When It’s Best to Use GBIC and When to Use SFP, and RJ45 vs SFP: Which Should I Use to Connect Two Switches, specifically discussed when to use which port/module type. This entry was posted in Network Switches and tagged GBIC port, RJ45 port, SFP port, SFP slot, SFP vs. RJ45 on February 7, 2018 by Serenity Huang. POST NAVIGATION ← Buy PoE Switch: Five Aspects to Consider 100G DWDM QSFP: The Enabler of 100G Long Distance Connectivity → Search for: RECENT POSTS * PCI vs PCI Express: What’s the Difference? * What Is SWDM4 and 100G SWDM4 Transceiver? * 25G Ethernet – How It Develops and What’s the Future of It? * How to Choose A Suitable Power Over Ethernet Switch? * Why Should You Use A Managed Switch With PoE? 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