How can I add SIP / VoIP capability in Empathy in 14.04?
Is "account-plugin-sip" package enough or do I have to install other packages like "telepathy-rakia" / "telepathy-sofiasip"?
In my case, installing telepathy-rakia was enough to be able to add a SIP account. I also installed account-plugin-sip afterwards but did not notice any difference (yet).
account-plugin-sip
in addition to telepathy-rakia
in order to have SIP in the "Online Accounts" of System Settings. Ubuntu 14.04.3 LTS, that is. (NOTE: I updated the Gnome Wiki as this should be the authoritative source for Empathy configuration.)