SFP package - hot-plug small form factor module, the highest rate of up to 10.3G, the interface as LC.

SFP is SMALL FORM PLUGGABLE (Small Form Factor Pluggable) acronym, can be simply understood as an upgraded version of GBIC, SFP modules are small by half. But on the same panel configuration more than double the number of ports. Other features SFP and GBIC modules basically the same. Some switch vendors said the SFP module as small GBIC (MINI-GBIC).

Composition SFP modules

Laser (TOSA includes a transmitter and receiver ROSA) and board IC and external parts composition. External accessories there are housing, PCBA, base, pull ring, snap, unlock, rubber stopper composition. For ease of identification, in general, to griphook color discrimination module parameter type.

SFP Module Type

SFP transceivers have several different types of transmission and reception, the user can select the appropriate transceiver for each link, to provide based on the available fiber types (multimode fiber or single mode fiber) to achieve "optical performance." Available optical SFP modules are generally divided into the following categories: 850nm 550m MMF (SX), 1310nm wavelength 10km SMF (LX), 1550nm wavelength 40km XD, 80km ZX, 120km EX or EZX, and DWDM. SFP copper transceiver provides the interface so designed primarily for optical fiber communication host device can communicate via UTP network cable. There WDM (CWDM) and single-fiber "two-way" (1310/1490 nm upstream / downstream) of SFP.

Commercial SFP transceivers offer rates up to 4.25Gbps. Several packages 10Gbps transceivers for XFP, and SFP package is consistent with the new variant "SFP+".

SFP module Function

Most of the optical SFP transceivers support SFF-8472 (Industry Standard multilateral agreements), according to SFF-8472 agreement, it must support Digital Diagnostic Monitoring (DDM, Digital Diagnostic Monitor) function, this feature enables the end user to real-time detection SFP parameters, such as basic five Monitoring: temperature, transceiver supply voltage (Vcc), laser bias current (Tx Bias Current), the optical output power (Tx Power), the input power (Rx Power).

Information

SFP MSA defines 256 bytes in EEPROM memory map, standard interfaces, manufacturer and other information, I ^ 2C interface 8 address 10100000X (A0h) can access.