Product Overview
The range of Cisco® 10GBASE XENPAK modules offers a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications

Main features of Cisco 10GBASE XENPAK modules include:
• Supports 10GBASE Ethernet
• Hot-swappable input/output device plugs into an Ethernet XENPAK 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 feature that enables a Cisco switch or router to identify whether the module is a Cisco certified and tested XENPAK module
• Interoperable with respective Cisco 10-Gigabit X2, XFP and SFP+ modules on the same link
Cisco offers six modules in this product family:
• Cisco XENPAK-10GB-CX4: Supports link lengths of up to 15m on CX4 cable.
• Cisco XENPAK-10GB-LRM: Supports link lengths 220m on standard FDDI-grade multimode fiber (MMF). To ensure that specifications are met over FDDI-grade, OM1 and OM2 fibers, the transmitter should be coupled through a mode conditioning patch cord. No mode conditioning patch cord is required for applications over OM3. For additional information on mode conditioning patch cord requirements please see: www.cisco.com/en/US/prod/collateral/modules/ps5455/product_bulletin_c25-530836.html.
The Cisco 10GBASE-LRM Module also supports link lengths of 300m on standard single-mode fiber (SMF, G.652).
• Cisco XENPAK-10GB-SR: Supports a link length of 26m on standard FDDI grade MMF. Up to 300m link lengths are possible when using 2000 MHz/km MMF (OM3).
• Cisco XENPAK-10GB-LR+: Supports a link length of 10 km on standard single-mode fiber (SMF) (G.652).
• Cisco XENPAK-10GB-ER+: Supports a link length of up to 40 km on SMF (G.652).
• Cisco XENPAK-10GB-ZR: Supports link lengths of up to about 80 km on SMF. This interface is not part of the 10 Gigabyte Ethernet standard but is built according to Cisco optical specifications.