I don't think there is on the 851The 870 series do however. If there is an upgraded IOS it is an extra cost item and may also need a flash memory upgrade as well

But as I have the 870 series unless you dig very deep and discover that the 'plus feature set' is not standard then you end up very disappointed.

I am astonished that a feature that is made to look standard on the sales literature is in fact a cost upgrade. I have contacted the retailer in an attempt to sort something out but this is apalling. If I don't have any sucsess I will RMA 3 routers a...

But how do I download the IOS images - I cannot log in and am totally confused how to register for access. I bought the routers from a UK retailer

Thanks for the prompt replyThat is likely to be the problem as it is using the default IOS 12.4 (4).I must admit to finding the different versions of IOS confusing - which one do I need ?Thanks