I'm building an simple PBX with 1 Kamailio as load balancer for several Asterisk servers.

My issue is if an extension is in-call on Asterisk#1 wants to consult transfer to another number, it makes another call and Kamailio forward this new call to another Asterisk and cause call tranfer will fail.

Does anyone here have tips or sugestions to resolve this?

Thanks in advance for your help.

Best regards