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Small Form-factor Pluggable (SFP) is a compact, hot-pluggable network interface module format used for both telecommunication and data communications applications. An SFP interface on networking hardware is a modular slot for a media-specific transceiver , such as for a fiber-optic cable or a copper cable. [ 1 ]
SFP modules use duplex fiber cabling with LC connectors. SFP-DD modules are used in high-density applications that need to double the throughput of traditional SFP ports. SFP-DD modules are used for high-density applications that need to double the throughput of an SFP Port. SFP-DD is defined by the SFP-DD MSA and enables breakout to two SFP ports.
SFP+ modules share a common physical form factor with legacy SFP modules, allowing higher port density than XFP and the re-use of existing designs for 24 or 48 ports in a 19-inch rack width blade. Optical modules are connected to a host by either a XAUI, XFI or SerDes Framer Interface (SFI) interface. XENPAK, X2, and XPAK modules use XAUI to ...
QSFP28 modules use the CAUI-4 electrical interface. SFP-DD or Small Form-factor Pluggable – Double Density modules use the 100GAUI-2 electrical interface. Cisco's CPAK optical module uses the four lane CEI-28G-VSR electrical interface. [127] [128] There are also CXP and HD module standards. [129] CXP modules use the CAUI-10 electrical interface.
PowerConnect 2808, 2816, 2824, and 2848 are dual-mode unmanaged or web-managed all-Gigabit workgroup switches (10/100/1000). 8, 16, 24, or 48 ports respectively. On the 2824 and 2848, there are an additional 2 small form-factor pluggable transceiver (SFP) modules, for fiber-optic connectivity.
The technical details of coherent optical modules were proprietary for many years, but have recently attracted efforts by multi-source agreement (MSA) groups and a standards development organizations such as the Optical Internetworking Forum. Coherent optical modules can either plug into a front panel socket or an on-board socket.