kamailio TM module to add delay in sending 100 Trying

Question

Can auto_inv_100 parameter present in kamailio TM module be triggered with a time delay. Currently it's triggered immediately once INVITE reaches kamailio module.

Answer 1

The 100 is sent from inside t_relay() automatically if that parameter is enabled (and it is by default), and there is no delay mechanism.

What do you want to achieve?

If your objective is to send a 100 Trying only when you decide, then you can disable auto_inv_100 and use something like sl_send_reply("100", "Trying"); where you need it, as suggested here by Daniel Mierla.