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SFP module

SFP Module - Digitus
Ordered before 9 p.m., delivered tomorrow
€ 59,99
SFP Module - Digitus
Ordered before 9 p.m., delivered tomorrow
€ 19,99
SFP Module - Digitus
Ordered before 9 p.m., delivered tomorrow
€ 39,99
SFP Module - Digitus
Ordered before 9 p.m., delivered tomorrow
€ 79,99
SFP Module - Digitus
Ordered before 9 p.m., delivered tomorrow
€ 89,99
SFP Module - Digitus
3-5 days delivery time
€ 379,99
SFP Module - Digitus
3-5 days delivery time
€ 149,99

What is an SFP module?

Glas fiber is an ideal medium for transporting data at high data rates over long distances. In computing and networking equipment, electrical pulses are used to represent digital information. To use fiber optics, these electrical pulses must be converted into light pulses. This is done with a special LED or laser diode. The light pulses from this LED or laser diode are transported through the transparent core from one side of the fiber to the other. On the other side, the light pulses are captured by a light-sensitive semiconductor and converted back into electrical pulses. For a full-duplex connection, two glass fibers are used. One for transmitting and one for receiving data. A light transmitter and light receiver, also called a transceiver, is thus needed on each side of a fiber-optic connection. From the point of view of flexibility, a system of modular fiber optic transceivers was chosen. These transceivers have connections for the transmitting and receiving fiber optics on one side and an electrical connection on the other. This system of fiber optic trancevers is called small form factor pluggable transceiver, or SFP transceiver for short.

The advantage of the SFP module

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Many modern networking equipment is equipped with a slot into which this transceiver fits. This has several major advantages over equipment with fixed fiber optic connections. This choice keeps network equipment flexible with respect to the type of fiber optic chosen. There is a wide range of SFP transceivers, allowing great freedom of choice in fiber optic implementation choices. If there is a need to upgrade the speed of the fiber optic network and the network equipment has sufficient capacity, only new SFP modules need to be purchased. Once the new fiber optic cable is installed, it can be connected to a new SFP module. The old module can be pulled out of the network router and the new one plugged into the vacated slot. Since an SFP module is hot pluggable, the router does not even need to be turned off. It is also possible to choose a router with multiple free slots without incurring high additional costs. With network equipment with an SFP slot and an appropriate loose SFP module, you make a cost-effective and flexible choice.

Types of transceivers

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Since there is a wide choice, it is important to pay close attention to the specifications when choosing an SFP module. If a short-distance fiber optic network is being set up with multimode fiber, choose a multimode transceiver. If a long-distance fiber network is being set up with single mode fiber, choose a single mode transceiver. Transceivers for multimode and single mode fiber optics are not interchangeable due to the different optical properties. Transceivers are suitable for one wavelength or color of light. 1310 nm (nanometer) is often used for single mode fiber and 850 nm is often used for multimode fiber. There are exceptions to this and transceivers of different wavelengths do not work together. So make sure that both transceivers use the same wavelength and that this wavelength is supported by the fiber optic cable used. Each type of transceiver has a maximum transfer rate. The fiber optic link speed is limited by the maximum transfer rate of the transceiver. So choose a transceiver that offers sufficient speed. If you are using Cisco equipment, it is important to choose an SFP module that is compatible with your networking equipment. Cisco and Cisco-compatible modules indicate the types with which they are compatible.

Compatibility

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There are two types. The original modules operated at maximum speeds of up to 1.25 Gb/s. Within the SFP arrangements, different letter combinations indicate the wavelength used and the maximum length that can be bridged:

CODE GOLFLENGTH MAXIMUM LENGTH
LX 1310 nm 10 km
EX 1310 nm 40 km
ZX 1550 nm 80 km
EZX 1150 nm 160 km

The enhanced standard is denoted SFP+ and is suitable for speeds of 10 Gb/s and above. Note that SFP and SPF+ transceivers are not readily interchangeable. Some network equipment accepts both modules but this is not a rule. Consult your network equipment specifications to see if your equipment is compatible with SPF, SPF+, or both. SFP+ supports "direct attach. Direct attach allows two SPF+ ports to be directly connected to each other through an SFP+ cable. This is particularly useful when racking network equipment. You will find several SPF+ direct attach cables in our product range. Many manufacturers including Cisco restrict their equipment to only accept SPF tranceivers of their own brand. The recognition of modules is done based on the manufacturer ID included in the firmware of the SFP transceiver.