Is shaw still activating these?
@dr49 -- according to a Shaw web-page, listing "retired" and "soon to be retired" TV boxes, the answer is "it still can be activated".
The next "retirement" is: National retirement: August 5, 2021 for the DCT6416. The similar DCT3416 is scheduled for April 2022.
Suggestion: if you have recorded any content on those PVRs, you should watch it, while you can.
@dr49 -- According to a Shaw web-site, if you live in the Calgary region, the answer is "no".