Configuring External Internet Telephony
Requirements:
•External VoIP channel (optoptional, see Technical Data in the Instructions)
•An account with a VoIP provider
•Configured internal subscribers
Configure the PBX as follows:
1.Configure at least one VoIP channel as an external VoIP channel.
2.Make sure you have current VoIP provider data:
•Check previously configured provider data.
•Download and import provider data from the Internet.
•Enter provider data manually.
3.Configure the DNS server.
4.Create at least one VoIP account in the PBX and enter the account and access data.
5.Enter your own VoIP phone numbers.
6.Set up call distribution (for incoming calls).
7.If necessary, enable DiffServ to preferably treat the voice data over other data by menas of the router and to increase the VoIP call quality.
8.Check if the registration of the VoIP account was successful (Monitoring > Status VoIP accounts).
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 of the providers used (Public switched tel. networks > VoIP > Provider > Configure).