Can BYOP PBX users call PSTN through Zoom phone system if there is no direct PSTN access for PBX?

[sdu]

Hi,

 We have a Zoom Phone system account and a local PBX without PSTN access. we can setup BYOP using SBC between Zoom and PBX and call between Zoom and PBX users are working, we also can make inbound call to PBX user via external contact, I am not using BYOC for PSTN access but Zoom provider exchange. Can I call PSTN from PBX users through Zoom phone system? if the answer is YES,  any document or idea how to setup the BYOP SBC (Ribbon SWe Core)

Thanks,

Simon