BYOD - When I park a call on an Allworx PBX the call is disconnected

[kellenw]

Well, I've gone back to using the supplied grandstream ATA and piping the two "lines" into the pbx via FXO inputs, but this is hopefully a temporary situation, and I can get to the bottom of this issue... so I can resume using the service on the Allworx box via direct SIP registration.

This is such a strange thing, because literally no other provider I've used (voicepulse, sipvine, callcentric, vestalink) has had the problem I mentioned in the original post. This ONLY happens when using VoipO, and it happens every time. Put incoming call on hold... call drops. Every single time.