I want to upgrade my routers cisco 2811 with IOS version 12.4(8) to 12.4(25c) because of to resolve CSCse 34097 bug voice problem .
But I can't download IOS image and I'm not clear how can I download it.
Any specification ( i mean router's product ID, serial No ) can help to download this IOS ?
who can help me to get this IOS?
My routers are bought from IPtel company & I didn't contact with them to claim new IOS.
I need urgently to upgrade to resolve voice error.
Help me all expert.