Cisco 2500 Series Config

[jsantana5]

I have Cisco 2500 Series Router that was configured by a Previous IT Guy and when it reboots it said (Cisco Controller)> I can't get out of it I have already reset it, I need to get it back to factory defaults, any help would be greatly appreciated. 

[Reza Sharifi]

You may be able to use the Rommon to recover. 

https://www.cisco.com/c/en/us/support/docs/routers/2500-series-routers/15078-recovery-c2500.html

The good old 2500 series routers are over 25 years old.  With 10mb Ethernet interfaces and t1 for WAN and Internet,  it may be better to ask your local provider to give you a faster connection for a cheaper price. 

HTH