Why does the IP address of the SBC in a BYOC configuration have to be unique?

Why can Zoom differentiate on port like Teams, or allow FQDNs?

How are you supposed to configure BYOC for clients that are on a multi-tenant SBC?

The following error is received when using the same IP address: "The address you are trying to add is already in use"

I am admin for my office on Zoom Phone.  Today one of our staff began experiencing no sound when calling out (using Workplace or cell phone App).  When dialing out she can hear the individual number key notes; once a call routing begins she can no longer hear the call ringing, and once connected she cannot hear the person who answers and they cannot hear her.  Again, this is happening to her whether using her  computer via Workplace OR using her cell with the Zoom phone app, using speaker and mic, or headset.  This issue started today - we have been using Zoom phone since July 2024 without this issue.  All other users are having no audio issues upon call routing or call connections.

Any thoughts?

An error has occurred and we are unable to complete your purchase. Please make sure your information is correct or contact support for assistance. (Error code: 5613)

I am in trouble while purchasing zoom phone number, they are continuously showing the same error 5613, 

Please suggest some solution on it, and make this process easy

Thanks