Blog How we build it.
Designs and decisions behind QuadChroma and QC-Phone, written down in full.
Twice as fast: QuadChroma now also builds on a Mac mini with Apple M4
By Robert Brandt, QuadChroma
About twice as fast as before, with several builds running side by side, and QC-Phone got its own Mac mini, too. Thank you, Scaleway!
A second call during a call: how QC-Phone Plus handles call waiting without delivering calls
By Robert Brandt, QuadChroma
Part 2: what happens when a second call reaches QC-Phone Plus while you are already talking. It is announced like any other call, the phone never tells the server that it is on a call, and it fetches the second call only when you answer.
Fetch, don't deliver: how QC-Phone Plus brings incoming SIP calls to a sleeping iPhone
By Robert Brandt, QuadChroma
Our push service for QC-Phone Plus never delivers a call to the phone. It holds the call, only tells the phone who is calling, and the phone fetches the call when you answer. We publish the design so that anyone can use it.