I'm not saying that outright, I can however comment that I use it on a daily basis (along with thousands of other engineers), and haven't found an SP it doesn't work with.
Some of the functions available on 17070 are extremely limited with the odd SP, like 'Quiet line' test, but it will still report back the number that is being worked on.
The only system I'm not sure of is Virgin Media's own networked lines, and that don't interest me in my day-to-day happenings.