Hello,

I’m trying to understand how to configure Asterisk 13’s PJSIP stack. I’ve read the pages in [1] and still have a couple of questions to ask.

In my lab, I’ve configured an Asterisk 13 box to act as an ITSP box and another Asterisk 13 to act as an IPBX.

I’m trying to configure the ITSP box such as it would accept incoming registrations and calls from any IP address (dynamic), if and only if IPBX
provides both a username and a password.

1. From experiments, I’ve found that OPTION messages sent by IPBX box have a From field which contains the following value :
From: ;tag