In the criteria of the "Outbound Rules", "Calls from Extension(s)" having comma separated values will allow multiple extension ranges to be defined - Answer ✔️✔️-True
The Virtual Extension of the slave must match the master side virtual extension number - Answer ✔️✔️-True
For extensions that are registered over multiple site-to-site VPNs, by default 3CX delivers the audio between phones if they are on different subnets. - Answer ✔️✔️-False