Will C-Bus work on a Vantage Controls bus cable network?

I have a small site (3 bed unit) that has a now failing Vantage Controls system. They run a 2-wire 36vdc bus cable... Has anyone successfully ran a C-Bus network on a cable like this? This would only be for the field loop est 100m in length.

 

yeah it will probably work very well - remebering when C-Bus firs came out it was run using a 2 pair cat 3 cable very small twist ratio, also remember the route lenght is a total of all cables - I think the vantage used a lot of star configuration so the lenght isnt just the longest run but the accumulated toatal of each run of the star point.