[arch-proaudio] Jami: is JACK implemented?

Hi, sorry if this is not the place to ask. I've been trying Jami for video-calls between a couple of laptops with Arch and Debian Testing. I've seen that in Arch one can choose JACK as audio server, which is *awesome*. But when tried to connect its ports (in the 'Connections' window of qjackctl) I'd found myself unable to. Is this how it's supposed to be working right now? I mean: is JACK implemented/usable, at what extent? Or what should I do to use Jami over JACK instead of PulseAudio?, without PA-bridge, just simple plain JACK. Thanks a lot in advance for any info. Best regards!