External Private Branch Exchanges

Help > Functions and applications > VoIP > External Private Branch Exchanges

The PBX handles external extensions in the same way as internal VoIP telephones.

Further help under Internal IP telephony

VoIP telephones are connected to the PBX network via a VPN tunnel.

Note: If necessary, contact your network administrator to find out the VPN settings.

Further help under VPN

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

Important: When setting up an external extension, please note that the availability of an NTP server must also be guaranteed for these telephones.

Further help under Date and Time