Hi,
about your questions:

Q1: yes it's feasible as long as the two Registrars (Kamailio) have the location information. Please see my reply on a thread on this topic:
http://lists.sip-router.org/pipermail/sr-users/2016-February/091612.html

Q2: given that TSILO depends on the users' location you have to put it in the Registrar.

Best regards,

Federico

On Wed, Nov 30, 2016 at 5:32 AM, C. J Hsu (徐熙杰) <CJ.Hsu@quantatw.com> wrote:
hi Federico

i'm stuck at TSILO and wondering if you could give me some advises.

Q1:

in lab1, I'm having two Kamailios with proxy and registrar together, UA1 and UA2.
UAs go thru hardware load-balancing device (F5) to register themselves in Kamailio,

I wonder, UA1 calling to UA2, invite suspended in Kamailio 1, waiting for UA2;
and when UA2 come to register in Kamailio 2, TSILO in Kamailio 1 resumes the invite and sending it to Kamailio 2, is this a no problem scenario?

Q2:

if we decide to separate Proxy and Registrar in different Kamailio, when should I put TSILO in?


RGDS

C J