FreePBX 14 + Opus Codec

Opus Interactive Audio Codec Download the opus codec files and move them to their proper directories: * cd /tmp * wget http://downloads.digium.com/pub/telephony/codec_opus/asterisk-14.0/x86-64/codec_opus-14.0_current-x86_64.tar.gz * tar -zxf codec_opus-14.0_current-x86_64.tar.gz && cd codec_…

Install FreePBX 14 + Asterisk 14.7.7 on Debian 9.5

Installation First, log into your newly installed Debian server as root. I'm using Digital Ocean for this install and you can use this referral link to get $10 in credit. Check the network config: nano /etc/network/interfaces Verify that that a static IP has been assigned to the WAN…

Prevent "Ghost Calls" on Polycom VVX Series

Prevention via best networking practices: Disable SIP ALG Disable DMZ Disable Port-Forwarding ports used for SIP (example 5060) If the above mentioned methods fail, implement “Incoming Signaling Validation” in the Polycom’s configuration file. This will prevent the phone from responding to malicious SIP INVITEs. Config: <voIpProt.SIP.requestValidation…

First Post

Recently migrated my website from WordPress to Ghost in the seach for a more simplified blogging experience. I would like to use this new (to me) blogging platform to track my current tech projects.…

About Me

PHIL GRECO NETWORK / LINUX ADMIN Currently working in telecommunications (specifically VoIP). In my free time, I work on various VoIP, Linux and networking projects. My plan is to use this blog to document and keep track of my projects as they progress.…