QSIG in 2021

[WillWood]

I have a client who needs to retain a QSIG connection to their parent company, which is obviously an outdated service, but it a pre-requesite of the job. Has anyone had any experience configuring a 3CX to work with QSIG? I'm assuming we'd use something like an Audiocodes Mediant gateway to provide a SIP connection to the 3CX and convert to QSIG, but this is breaking new ground for me. Any advice or experience appreciated. Thanks