Upgrade / migrate old Asterisk server and applications

This project contains 4 milestones: Milestone 1 Setup fully working Asterisk 18 as Docker container with ODBC MySQL remote connection: Dockerfile Asterisk config files Milestone 2 Migrate existing Asterisk application (dialplans, extensions, trunks, bash scripts containing Asterisk commands etc) from Asterisk 11.7.0 to Asterisk 18 container from Milestone 1 with MySQL connection to a remote MySQL server/container. Milestone 3 Review existing design/architecture of PHP applications - Asterisk interaction and provide feedback, improvements and best practices. Milestone 4 Install and configure a new SIP connection with a remote 4 SIM cards GSM gateway and configure the dialplan to add this SIP connection into the existing dialplan and application: set priorities between existing SIP trunks, set failover (to use the next SIP trunk if the first one is not available etc) If more information or details are needed please ask.