External Internet Telephony
Using Internet telephony, calls and data are transferred via the Internet. This requires an account at a VoIP provider. The transmission quality and the reliability of Voice over IP depends to a great extent on the quality of the Internet connection used.
Configuration of a DNS server is necessary for translating the phone number.
Further help under NetworkConfiguration
•Configuring at least one VoIP channel as external VoIP channel.
−Administration > VoIP > VoIP configuration > Distribution of the VoIP channels
•Creating a VoIP account.
−Exchange lines > Providers and Accounts > New
•If required, importing current VoIP provider data.
−Exchange lines > Providers and Accounts > Import
•Entering account and access data for the VoIP account.
−Exchange lines > Providers and Accounts > > Access data
•Checking registration.
−Exchange lines > Providers and Accounts > Status
•Creating a call distribution for incoming calls.
−Exchange lines > Exchange line routing > Exchange line routing incoming > Call distribution for
•If required, making VoIP settings (jitterbuffer, echo compensation) for increasing the VoIP call quality.
−Exchange lines > Providers and Accounts > > RTP
•If required, reducing the Interval NAT Keep Alive.
Note: If no calls are possible via VoIP, although account registration and perhaps even an initial call were successful, this might have something to do with a very short timeout configured in the firewall. Reduce the Interval for NAT Keep-Alive for all used providers.−Exchange lines > Providers and Accounts > > SIP