![My grandfather gave me a Cisco 2500 series router and it looks like it predates Ethernet. How can I get this working? What are all these ports, what signals do they use, My grandfather gave me a Cisco 2500 series router and it looks like it predates Ethernet. How can I get this working? What are all these ports, what signals do they use,](https://i.redd.it/tikgjcqfvqi61.jpg)
My grandfather gave me a Cisco 2500 series router and it looks like it predates Ethernet. How can I get this working? What are all these ports, what signals do they use,
![Cisco 2500 Series Wireless Controllers for Medium Branch and Small Enterprises-Up to 75 Access Points – Router Switch Blog Cisco 2500 Series Wireless Controllers for Medium Branch and Small Enterprises-Up to 75 Access Points – Router Switch Blog](https://blog.router-switch.com/wp-content/uploads/2015/05/Cisco-2500-WLC-2504-Model.png)
Cisco 2500 Series Wireless Controllers for Medium Branch and Small Enterprises-Up to 75 Access Points – Router Switch Blog
![Cisco 2500 Series Wireless Controllers for Medium Branch and Small Enterprises-Up to 75 Access Points – Router Switch Blog Cisco 2500 Series Wireless Controllers for Medium Branch and Small Enterprises-Up to 75 Access Points – Router Switch Blog](https://blog.router-switch.com/wp-content/uploads/2015/05/Cisco-WLAN-Controller-Portfolio.png)