If a company's internal DNS is down, how can a SIP Remote Worker client register with the IP Office using a Wi-Fi connection?
The client can use the Internet router/firewall to proxy the IP Office IP address.
The client can use FQDN and port forwarding router to access the Internet DNS.
DHCP can redirect the registration to a backup DNS.
The client can only use the cellular network to register with the IP Office.
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