External Private Branch Exchanges
The PBX handles external extensions in the same way as internal VoIP telephones.
Further help under Internal IP telephonyVoIP telephones are connected to the PBX network via a VPN tunnel.
Note: If necessary, contact your network administrator to find out the VPN settings.
Important: When configuring an external extension, remember that these telephones can only make emergency calls if specific requirements have been met.Further help under Emergency calls