Dmitry Sinina writes:
There is also SEMS forked by yeti-switch project
It has a lot new features but it is
not fully compatible with old modules.
Last time I checked, yeti-switch/sems does not have sbc app (at least
not with that name), I had problems with building its dsm app, and it
lacked support for ZRTP.
If these are not show stoppers for someone, then it should be OK to use