What is the difference between sfp+ interface and sfp interface?

SFP module (half the size of the GBIC module, you can configure more than double the number of ports on the same panel. Since the SFP module is basically the same as the GBIC, it is also called miniaturized GBIC by some switch manufacturers. -GBIC). The SFP module further reduces the size and power consumption by placing CDR and electrical dispersion compensation outside the module. It is used in optical communication applications in telecommunication and data communication. SFP connects network devices such as switches and routers. Motherboard and fiber or UTP cable. SFP is an industrial specification supported by some fiber optic device providers.

SFP+ Fiber Module (10 Gigabit Small Form Factor Pluggable) is a hot-swappable, communication protocol-independent optical transceiver that typically transmits light at 850 nm, 1310 nm or 1550 nm for SOD/SDH at 10 G bps. , Fibre Channel, gigabit Ethernet, 10 gigabit Ethernet and other applications, including DWDM links. The XFP includes a digital diagnostics module similar to the SFF-8472, but has been extended to provide powerful diagnostic tools.

SFP type SFP+ supports SONET, Gigabit Ethernet, Fibre Channel and some other communication standards. This standard extends to SFP+ and supports 10.0 Gbit/s transmission rates, including 8 gigabit Fibre Channel and 10GbE. The SFP+ module version of the fiber and copper versions has been introduced. Compared to the Xenpak, X2 or XFP versions of the module, the SFP+ module leaves part of the circuit in the motherboard implementation instead of the module.

The difference between SFP and SFP+

Many people don't know the difference between sfp and sfp+, so sometimes it brings unnecessary trouble. The 10G module has undergone development from 300Pin, XENPAK, X2, and XFP, and finally realized the transmission of 10G signals in the same size as SFP. This is SFP+. With its advantages of miniaturization and low cost, SFP has met the high density requirements of optical modules. Since the standard was introduced in 2002, XFP has been replaced by the mainstream of 10G market in 2010.

SFP+ optical transceivers are upgrades to SFPs (sometimes referred to as "mini-GBICs"). SFP has been widely used on Gigabit Ethernet and 1G, 2G, 4G Fibre Channel. In order to adapt to higher data rates, SFP+ has designed electromagnetic shielding and signal protection characteristics that are enhanced than SFP, and has developed new electrical interface specifications.

SFP+ optical module advantages:

1. SFP+ has a more compact form factor (same size as SFP) than X2 and XFP packages;

2, can be directly connected with the same type of XFP, X2, XENPAK;

3. The cost is lower than XFP, X2 and XENPAK products.

The difference between SFP+ and SFP:

1. SFP and SFP+ have the same dimensions;

2. SFP protocol specification: IEEE802.3, SFF-8472;

The difference between SFP+ and XFP:

1. SFP+ and XFP are both 10G fiber modules and can communicate with other types of 10G modules;

2, SFP+ is smaller than the XFP appearance size;

3. Because of the smaller SFP+ signal modulation function, serial/deserializer, MAC, clock and data recovery (CDR), and electronic dispersion compensation (EDC) functions are moved from the module to the motherboard card;

4. XFP compliant protocol: XFP MSA protocol;

5. SFP+ compliant protocols: IEEE 802.3ae, SFF-8431, SFF-8432;

6, SFP+ is a more mainstream design.

7. SFP+ protocol specification: IEEE 802.3ae, SFF-8431, SFF-8432.

The difference between SFP multimode and single mode

At present, I have encountered several SFP problems on the project, and there are some problems related to the type of optical module. Actually, I have found some multi-mode and single-mode data.

The following are some of the concepts and differences between the multimode and singlemode SFPs that are known.

According to the wavelength, there are 850nm/1310nm/1550nm/1490nm/1530nm/1610nm, and the wavelength of 850nm is SFP multimode, and the transmission distance is below 2KM;

The wavelength of 1310/1550nm is SFP single mode, the transmission distance is above 2KM, relatively speaking, the price of these three wavelengths is cheaper than the other three.

If the bare module is not easily confused, the manufacturer will distinguish the color of the pull ring. For example, the black pull ring is multimode, the wavelength is 850 nm, and the blue, yellow, and purple pull rings are single mode. It is 1310 nm, 1550 nm, and 1490 nm.

Multimode:

Almost all multimode fibers are 50/125 μm or 62.5/125 μm in size, and the bandwidth (the amount of information transmitted by the fiber) is usually 200 MHz to 2 GHz. Multimode optical transceivers can transmit up to 2 kilometers through multimode fiber. A light emitting diode or a laser is used as a light source. The pull ring or outer body is black in color.

Single mode:

The size of the single mode fiber is 9/125 μm and has an infinite bandwidth and lower loss characteristics than the multimode fiber. Single-mode optical transceivers are often used for long-distance transmission, sometimes up to 100 kilometers. LEDs with narrower LD or spectral lines are used as the light source. The color of the pull ring or outer body is blue, yellow or purple. (Security weak current ring)

Differences and connections:

Single-mode fiber is cheap, but single-mode devices are much more expensive than comparable multimode devices. Single-mode devices typically operate on both single-mode fibers and multimode fibers, while multimode devices are limited to operation on multimode fibers.

With the close of single-mode and multi-mode SFP optical modules this year, the adoption of single-mode optical cables and single-mode modules has become mainstream. Single mode is significantly better than multimode type in use. Graphic knowledge of fiber module knowledge

Types of

SFP transceivers come in a variety of different transmit and receive types, and users can select the appropriate transceiver for each link to provide the "optical performance" that can be achieved based on the type of fiber available, such as multimode fiber or single mode fiber. Available optical SFP modules are generally classified into the following categories: MMF (SX) at 850 nm wavelength / 550 m distance, SMF (LX) at 1310 nm wavelength / 10 km distance, XD at 1550 nm wavelength / 40 km distance, 80 km distance ZX, EX or EZX at a distance of 120 km, and DWDM. The SFP transceiver also provides a copper interface so that host devices designed primarily for fiber optic communications can also communicate over UTP network cables. There are also wavelength division multiplexing (CWDM) and single fiber "two-way" (1310/1490 nm wavelength up/down) SFP.

Commercial SFP transceivers are capable of delivering rates up to 4.25 G bps. Several packages of 10 Gbps transceivers are available in XFP and a new variant "SFP+" that is basically identical to the SFP package.

Hongtaida's SFP+ optical module supports multi-protocol from 9.9Gb/s to 11.3Gb/s, support

DDMI data diagnostics, in accordance with the SONET OC-192 / SDH STM-64 standard.

Huatuo's SFP optical module complies with the MSA protocol. Compliant with Gigabit Ethernet as FC-PI-2 transmission definition specified in IEEE Std82.3 and 1 Fibre Channel, RoHS and lead-free

Youken's SFP+ optical transceiver module is a new generation of 10G optical transceiver module. It can meet Fibre Channel 8.5G and Ethernet 10G applications according to ANSI T11 protocol.

Currently, most optical SFP transceivers support SFF-8472 (Industry Standard Multilateral Protocol). According to the SFF-8472 protocol, digital diagnostic monitoring (DDM) must be supported. This feature enables end users to detect SFP in real time. Parameters such as basic 5 monitors: Temperature, Transceiver Supply Voltage (Vcc), Laser Bias Current (Tx Bias Current), Optical Output Power (Tx Power), Input Power (Rx Power).

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