The way I use Telynx is via SIP which is an open protocol. No reason we should be relying on proprietary APIs for this stuff.

On GitHub see my fork runvnc/PySIP. Please let me know if you know if something better for python that is not copy left or rely on some copy left or big external dependency. I was using baresip but it was a pain to integrate and configure with python.

Anyway, after fixing a lot in the original PySIP my version works with Telynx. Not tested on other SIP providers.