Hi Kevin,
I have found the training courses https://www.asipto.com/sw/kamailio-advanced-training/ and annual conference https://www.kamailioworld.com/k07/ to be great places to learn and explore kamailio.  There are some very helpful and knowledgable experts at those events.

The wiki and forums also have masses of information and lots of helpful people with insight to solve particular challenges.  But getting help to build your solution require a certain amount of getting the right search.

Your question reminded me of the fun we had introducing a multi-tenant farm of asterisk servers with working BLF’s.  Call parking and directed pickup were particularly fun… making sure to hit the same PBX with the retrieving call leg.

Good luck

Paul Smith
Voxbit.net


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On 19 Mar 2019, at 10:17, Kevin Olbrich <ko@sv01.de> wrote:

Hi!

Are there any Kamailio books?
I am still struggling with Kamailio on scenarios that need more then
REGISTER-offloading (like Kamailio cluster with BLF, custom NOTIFY,
DMQ, etc.).

Online docs are very limited or use Kamailio as a single tenant PBX.
What I need is a high available and high performance proxy in front of
asterisk, capable of handling thousands of tenants (each with BLF
working).
I am perfectly fine with building a solution for several months but I
am still unable to understand everything from the docs.

Where do the PROs and service companies get their knowledge from?

Kind regards
Kevin

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