Replacement form factors

The XENPAK form factor was initially supported by numerous network equipment manufacturers and module makers. However, advances in technology led to more compact form factors for 10 Gigabit Ethernet applications. Soon after the standard was introduced in 2001, two related standards emerged: XPAK and X2. These two standards have the same electrical interface as XENPAK (known as XAUI) but different mechanical properties.

The XPAK group was announced on March 19, 2002, first published their specification on May 24, 2002, and version 2.3 on August 1, 2003. The X2 group was announced on July 22, 2002, and published their specification on February 13, 2003. Issue 3.0 of the XENPAK MSA was transferred to the Small Form Factor committee as document INF-8474 on September 18, 2002. The XENPAK MSA website existed through the end of 2008.

August 15, 2011

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