Thanks for replying, Matt,
Sorry but I don't understand the terminology. A definition of 'N line' would be appreciated - I'm on VM broadband (I assume this is the provider?). Additionally, does the firmware; 'Kryptview_A780_23052016.bin' and 'KRYPTViEW_ArnEt_loaded.rar' work on a Mac? Every time I've downloaded Firmware from this forum and opened the file it just keeps repeatedly displaying another version of itself, ad infinitum. The latest version I have on my box is 4.2.08.
Your help is very much appreciated.