Hello, The PUA module is usually used with some of the other pua_* modules, e.g. pua_rpc for using RPC commands, pua_usrloc for using usrloc information and so on. Have a look to the pua readme first section, it lists all the modules. Regarding the general flow, usually you do handle_subscribe(..) from the presence module in the request_route for a certain event type. If a client is subscribed with the correct event type to an entity, you can use eg. pua_rpc to generate a NOTIFY for this event type and entity. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com<https://gilawa.com/> From: Jean-Francois Lemieux &lt;jflemieux(a)mcjconseil.com&gt; Sent: Saturday, December 31, 2022 3:19 PM To: sr-users(a)lists.kamailio.org Subject: [SR-Users] Question about UAC and PUA modules routing behavior Hello, I have some trouble to figure out how routing works when the request coming from the kamailio itself (used as a user agent per example) .I try to use presence PUA... modules. The issue I have is the NOTIFY requests aren't sent to the good destination; it doesn't seems to obey to the contact or other informations when the device did a SUBSCRIBE. I don't want to ask to troubleshoot the presence module directly I just want to know how Kamailio deals with request coming from Kamailio itself (in the case of a NOTIFY generated by PUA_... modules My mains questions are: Does the pua modules when generating request like NOTIFY will pass through request_route ? Does the pua modules when generating request like NOTIFY will be sent only when t_relay() is used or UA kamailio based request bypass all the logic of the Kamailio proxy behavior ? I'm trying to understand if I can modify the NOTIFY request to change destination before the "routing decision" is made by Kamailio Kamailio 5.6.0 used as : -proxy to remote pbx for call dialog -registrar/location server -media relaying and nat management -...and I try to use it as a presence server instead to use the pbx behind kamailio