1. Finding the corresponding optical module compatibility matrix via Cisco official website. 

2. On the running switches, enter the privileged mode and input # "show idprom interface gi1 / 0/48" command, you can query the optical module model and serial number, If not, try to input other two commands: xuxic or show idprom int g2/6

3. Checking the type and port based on the specification, it can be used as long as it is gigabit SFP optical module interface. But the specific models to be decided according to the actual demand, such as type, the actual use of distance, single-mode or multimode, single fiber or dual fiber etc. Welcome to consult Cozlink engineer.

The Cisco C6800-16P10G-XL= 16-port 10-Gigabit Ethernet Fiber module provides up to 40 10-Gigabit Ethernet fiber ports. Just like all other switches from this series this particular model's also works with a lot of Gigabit Ethernet SFP optical transceivers which can be found in Cozlink with high quality and competitive price. Moreover, most of them have adequate inventory, which ensures the customers to enjoy same day shipping. In addition to providing optical transceivers, Cozlink also offers patch cords, fiber optic pigtails and high speed cables for your choice.