XENPAK is a standard that defines a type of fiber-optic or copper transceiver module which is compatible with the 10 Gigabit Ethernet (10GE) standard.

XENPAKs come in a variety of physical layer interfaces, supporting multi-mode and single mode fibre optic cables and CX4 InfiniBand copper cables. Transmission distances vary from 100 metres to 80 kilometres for fiber and up to 15 metres on CX4 cable. Recently introduced XENPAKs using the 10GBase-LX4 standard operate using multiple wavelengths on legacy multi-mode fibres at distances of up to 300 metres, eliminating the need to reinstall cable in a building when upgrading certain 1 Gbit/s circuits to 10 Gbit/s.

Since the standard was introduced in 2001, two successor standards emerged. XPAK and X2. These two standards have the same electrical interface as XENPAK but different mechanical properties (such as size and weight).

ee also

* SFP interface

External links

* [http://www.xenpak.org/Default.asp XENPAK official website]
* [http://www.x2msa.org/MSA.asp X2 official website]
* [http://www.gridtoday.com/02/0909/100373.html XPAK announcement]
* [http://www.mergeoptics.com/xenpak-techdata.html Example Technical Information for a XENPAK module]

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