SIP - Robbie Cannings

Grandstream SIP error across multiple sites

I recently came across a Grandstream bug which caused major issues establishing SIP sessions between a remote site (over VPN) and the PBX. Synopsis A network exists between two locations (192.168.0.0/24 - Home, and 192.168.1.0/24 - Warehouse). These two locations are connected…

Grandstream UCM6104 PBX MyNetFone SIP Trunk

background MyNetPhone provisioned a SIP Trunk the other day with line formats as follows 61290012345 61290012346 61290023456 61280123456 (These are dummy numbers) For a couple of hours I couldn't for the life of me figure out why the SIP trunk failed to register (HTTP 404 errors for SIP…