What is this communications tower

We have tons of cellphone towers in Ottawa but these are radically different. They all have big white shacks at their bases (probably containing a backup generator among other things).
They are all the same height too.
Unlike some of the cellphone towers around here, especially in the country.
There is a Bell tower 2-3 miles from my house that has to be 200 feet tall and another Rogers tower near the end of my street that is only 100 feet tall. Of course we are on a ridge so maybe that accounts for it.

Here's a good look at one from Google Street View...

https://imgur.com/a/Xr5Bv0F

That brown building behind it is a Bell Canada building.