I've put the DocBook source code of the RTC Quickstart guide onto Github.
It currently includes some basic information about softphones, is there
anybody who would like to help expand it?
The goal of this document is to show people things that they can do to
set up federated SIP just using packages on the Linux distributions.
A lot of things like firewall, DNS and certificate creation are covered
in earlier chapters too. The new reSIProcate 1.10.0 release includes
SIP presence support, it is enabled by default and works with Jitsi
without any further configuration. The SIP proxy chapter helps people
get that running so that when they run Jitsi, SIP presence should just work.