I'm not an expert but have learnt from my own painful experience.
No surfboard with the an i at the end will work in ex cw are,which is euro docsis.
I did see something were it said a 4100(no i at the end) was duel docsis, but double check just in case.
Incase anyone(like me) doesn't know what docsis they are ,there is an easy way to tell if they have digital tv:
Bbc 1 is at channel number one and i think qvc is at channel 20.
Then your euro bloody docsis!
Any thing else and your docsis and your laughing!
Unless someone has messed with it using favorite channels?
Again double check cos i don't watch telly any more and the stb is broken( all the eights,three fat ladies)
Someone will tell you that you can just change the frimware,but this is not true.
If you get the motorola pdf of a sb'e' and a sb'i' and compare them there is a difference in some mega hertz thing tuner or something.
And that's that.
What a bummer, but at least you know now.
Sell you sb'i' and fork out for a sb'e' and you'll save hours and hours , and days of days on disapointment.