In the documentation it shows that this command is available, but it is failing on version 16 of OSX.
Jan 24 09:56:25.856
#### SSH Device Write ####
“zCommand Dial PhoneHangUp\r”
Jan 24 09:56:25.869
#### SSH Device Response ####
zCommand Dial PhoneHangUp
\r\n"
Jan 24 09:56:25.933
#### SSH Device Response ####
“*r onUnsupported Command(status=Error):
** end
\n\n”
Jan 24 09:56:25.933
#### Zoom Room - Error ####
“Unsupported command sent”