My PHP-based CRM already pushes one-way notifications through our integrated SMS gateway. I now need two key enhancements: 1. Assign one dedicated, system-level outgoing phone number that the code uses automatically for every SMS we send. 2. Capture incoming replies on that same number so our staff can read and respond inside the CRM. While adding this, please also log and display the delivery status (delivered, failed, pending) for each message in an easy-to-read field or column. The gateway APIs are fully functional and documented; you’ll extend the existing PHP modules, database tables, and any necessary webhooks to make the process seamless. Clean, well-commented code and a brief implementation note are the final deliverables.