Zulu not connecting when calling specific numbers

[lgaetz (Lorne Gaetz)]

sngrep

Virtuous Signalling

Continuing from Hooking for fun and income This post is a very basic introduction to SIP with specific focus on SIP for FreePBX and Asterisk. I know SIP reasonably well, but do not consider myself an expert. I deal with SIP signalling issues almost every single work day, and what I know of SIP serves me well when I stay in my lane (the FreePBX ecosystem). SIP is not simple, but it’s not rocket science either. As is the case with most things, debugging SIP problems gets easier with experience. I…