The HQFA suffix is the stripped-down version of the 564 (no ringer, no bulbs) supplied to Bell Canada.
Bell Canada found it more economical to supply ringer and lamps on an as-required basis.

This 1975 Northern Telecom NE-564 HQFA.
Served at the Bank of Montreal branch located at 2 Mill Street in Frankford, Ontario.
The branch ceased operations, with its final day of business being August 10th, 2018.

Google Image 2009