The Cisco 10GBASE X2 modules (Figure 1) offer customers 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 X2 modules include:
● Support 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 certified and tested by Cisco.
● Has optical interoperability with respective 10GBASE Xenpak, 10GBASE XFP and
10GBASE SFP+ modules on the same link.
● The Cisco 10GBASE-SR Module supports a link length of 26m on standard FDDI grade MMF. Using 2000 MHz*km MMF (OM3), up to 300m link lengths are possible. Using 4700 MHz*km MMF (OM4), up to 400m link lengths are possible.
X2 Port Cabling Specifications
| Cisco X2 | Wavelength (nm) | Cable Type | Core Size (Microns) | Modal Bandwidth (MHz*km) | Cable Distance* |
| Cisco X2-10GB-CX4 | - | CX4 (copper) | - | - | 15m |
| Cisco X2-10GB-T | - | CAT6A/CAT7 (copper) | - | - | 100m |
| Cisco X2-10GB-SR | 850 | MMF | 62.5 62.5 50.0 50.0 50.0 50.0 | 160 (FDDI-grade) 200 (OM1) 400 500 (OM2) 2000 (OM3) 4700 (OM4) | 26m 33m 66m 82m 300m 400m |
| Cisco X2-10GB-LRM | 1310 | MMF | 62.5 50.0 50.0 | 500 400 500 | 220m 100m 220m |
| SMF | G.652 | - | 300m |
| Cisco X2-10GB-LX4 | 1310 | MMF | 62.5 50.0 50.0 | 500 400 500 | 300m 240m 300m |
| Cisco X2-10GB-LR | 1310 | SMF | G.652 | - | 10 km |
| Cisco X2-10GB-ER** | 1550 | SMF | G.652 | - | 40 km*** |
