What is combo port and what does it mean for your network? It is used primarily to increase port density and decrease fiber usage per port.
The front of the SFP features a duplex LC connector; one connection for transmit and the other for receive. But the two different physical ports can only be used simultaneously. A lot of such questions on combo port are coming all the time.
The blue extraction lever indicates the module is designed for use with single-mode optical fiber. If you connect both the twisted pair port and SFP slot of a combo port pair to network devices, the SFP slot takes priority and the twisted pair port is blocked. Transceivers are also designated by their transmission speed.
In other words, it is a compound port which can support two different physical, share the same switch fabric and port number. How can I used it? Types[ edit ] SFP transceivers are available with a variety of transmitter and receiver specifications, allowing users to select the appropriate transceiver for each link to provide the required optical reach over the available optical fiber type e.
To many newbies, the combo port always makes them feel confused as there have been many Gigabit Ethernet ports and SFP slots for used on the switches. The top, metal canister is the transmitting laser diode, the bottom, plastic canister is the receiving photo diode. A Combo port is a way to provide different types of connectivity without taking up unused switch fabric, giving users the power and flexibility to configure their switch for their unique application requirements.
Based on LX but engineered to work with a multi-mode fiber using a standard multi-mode patch cable rather than a mode-conditioning cable commonly used to adapt LX to multi-mode.
SFP electrical pin-out .
Storage interface cards, also called HBAs or Fibre Channel storage switches, also make use of these modules, supporting different speeds such jogo dados casino 2Gb, 4Gb, and 8Gb. The related Small Form Factor transceiver is similar in size to the SFP, but is soldered to the host board as a through-hole device, rather than plugged into an edge-card socket.
Due to sometimes significant price differences between original and generic modules, there is a large market of "compatible" or "third party" modules that are programmed to show the appropriate vendor ID. They are not compatible with or rather: In simple terms, a combo port is considered as a single interface with dual front ends, i. Because of their low cost, low profile, and ability to provide a connection to different types of optical fiber, SFP provides such equipment with enhanced flexibility.
Reference the SFP switch instruction to configure your combo ports according to your requirement. You may use either the twisted pair port or SFP slot of a combo port pair, but not both at the same time. Other multi-mode SFP applications support even higher rates at shorter distances.
Standardization[ edit ] The SFP transceiver is not standardized by any official standards body, but rather is specified by a multi-source agreement MSA among competing manufacturers. It is a popular industry format supported by many network component vendors.
Compatibility[ edit ] Vendor specific modules[ edit ] Many manufacturers restrict their devices to accept only original SFP modules of the same brand, as identified by their vendor ID. SFP modules are commonly available in several different categories. That means if the SFP port is being used, then the corresponding copper port is automatically disabled and vice versa. SFP28 functions with both optical and copper interconnects.
Coupled with CWDM, these double the traffic density of fiber links.