The Cisco® 10GBASE X2 modules (Figure 1) offers customers a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications.

Features:
-Supports 10GBASE Ethernet.
-Hot-swappable input/output device plugs into an Ethernet X2 port of a Cisco switch or router to link the port with the network.
-Provides flexibility of interface choice.
-Supports "pay-as-you-populate" model.
-Supports the Cisco quality identification (ID) feature that enables a Cisco switch or router to identify whether the module is a Cisco.certified and tested X2.
-Optical interoperability with respective 10GBASE Xenpak and 10GBASE XFP modules on the same link.

The Cisco 10GBASE-CX4 Module supports link lengths of up to 15 m on CX4 cable.