For those interested in a downloadable PDF version of this write-up, please find it attached or available on our website. The PDF includes additional screenshots, diagrams, and code snippets to further illustrate the features and capabilities of FreeSWITCH 18.
This dials out through an external SIP trunking gateway whenever someone prefixes an outbound call with a 9 .
For a standard production environment handling up to 500 concurrent calls without media transcoding, utilize the following hardware profile: 4 Cores (Intel Xeon or AMD EPYC) RAM: 8 GB DDR4 freeswitch 18 pdf
: Improved DTLS-SRTP negotiation speeds and ICE trickling, resulting in faster call setup times for browser-based endpoints. Audio and Codec Improvements
sudo apt install -y build-essential git-core libtool autoconf automake libssl-dev libedit-dev libsqlite3-dev libcurl4-openssl-dev pkg-config libopus-dev libsndfile1-dev libsofia-sip-ua-dev libspandsp-dev For those interested in a downloadable PDF version
cd /usr/src git clone -b v1.8 https://github.com freeswitch-1.8 cd freeswitch-1.8 Use code with caution. Configuring Modules
| Error | Likely Cause | Solution (from PDF) | |-------|--------------|----------------------| | 498 Invalid Gateway | No matching gateway for the call | Check sip_profiles/external.xml and sip_profiles/external/*.xml for gateways. | | 500 Internal Server Error | Broken dialplan XML syntax | Run freeswitch -c -u to see parse errors. | | SIP/2.0 408 Request Timeout | Firewall blocking RTP ports | Ensure UDP range 16384-32768 is open. | | mod_sofia: Cannot bind to 0.0.0.0:5060 | Another SIP process (e.g., Asterisk) is running | Run netstat -tulpn | grep 5060 and kill the process. | For a standard production environment handling up to
FreeSWITCH configurations are centrally managed through highly structured XML files located by default in /usr/local/freeswitch/conf/ . Directory Structure