Robbie Cannings

An online space to store my technical observations, learnings and anything which may help me or others in the future.

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    08 Sep 2015

    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…

    08 Sep 2015 Read More
    • Grandstream
    • SIP

    24 May 2015

    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 Trunk Auth…

    24 May 2015 Read More
    • Grandstream
    • SIP
    • IP Telephony

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