This product is either discontinued or we cannot get that from suppliers.
Cisco Catalyst C6800-SUP6T-XL=, Data Networking, Optical Network, Interface 1 x USB Management, 1 x RJ-45 Serial Management, 1 x RJ-45 Management, Optical Fiber, 10 Gigabit Ethernet, 40 Gigabit Ethernet, Network 10GBase-X, 40GBase-X, Expansion Slots-10.
The Cisco Catalyst 6800 Supervisor Engine 6T is the newest addition to the family of supervisor engines. The Supervisor Engine 6T is designed to deliver higher performance, better scalability, and enhanced hardware-enabled features.