[SR-Users] What to download?

[Antonio Goméz Soto]

Hi,

I'm a longtime asterisk user, needing to scale up. I figured it
would be smart to use and develop for sip-router, because it'll come out
soon.

But I've never used one of ser, openser, or siblings, and now I'm
confused by the download links on you site.

I see kamailio_3.0, master, sr_3.0, stable and unstable top level
directories. What should I download? What's the diference between
them?

Thanks,
Antonio