Your AI Agent doesn't need a manifesto. It needs a tight, unambiguous spec. Here's how to write one. We recently rewrote our AI Receptionist's system prompt. The previous version was 450 lines long, beautifully structured, full of carefully reasoned policy - and it was eating so much of the context window that the agent had less room to actually listen to the caller! To help [...]
Stability fixes for the iOS app. 3CX iOS App V5.6 Beta is one of the smaller updates focused primarily on stability, usability improvements and resolving issues affecting day-to-day usage. Fixes and Improvements This update resolves issues affecting: Voicemail enabled/disabled state checks and corresponding UI behavior Chat truncation issues affecting certain languages Handling [...]
Security and stability improvements for the Android app. 3CX Android App V5.6 Beta is a smaller update focused primarily on security-related enhancements, stability improvements and resolving issues affecting daily usage. Fixes and Improvements This update resolves issues affecting: Security-related enhancements across the app Voicemail enabled/disabled state checks and corresp [...]
Override office hours, command-line deployment options and improved Poly headset support. 3CX Softphone V5.6 Beta (Build 1159) introduces new office hours management capabilities, expanded deployment flexibility via command-line arguments, and a new and improved Poly headset integration provided by HP, with support for additional devices. This release also includes several usab [...]
HTTP/2 Bomb — CVE-2026-49975 · Full Disclosure · June 8, 2026 A recently disclosed denial-of-service vulnerability, known as HTTP/2 Bomb (CVE-2026-49975), affects multiple web server implementations. CVE-2026-49975, also known as HTTP/2 Bomb, is a remote denial-of-service exploit against most major web servers, including nginx, Apache httpd, Microsoft IIS, Envoy, and Cloudflare [...]
Action required due to a web server configuration vulnerability. 3CX has released a security hotfix relating to a third party component. If your 3CX deployment is reachable from the public internet, apply the latest update immediately. 3CX hosted instances have already received the update. Who is Affected Deployment type Publicly accessible from the internet? Action required Ho [...]
Last stop before final release. We’re rolling out RC3 to address the last minor fixes ahead of the final Update 9 release. Fixes in Release Candidate 3 VoIP Provider templates - fixed an issue where switching templates could trigger an exception. Dialer - fixed an issue where the dialer would automatically grab focus, causing accidental call pickups. Web Client - fixed delays a [...]
Hands-free automated VM provisioning for Proxmox VE. We are excited to announce a faster, hands-free method for provisioning a 3CX PBX Virtual Machine on Proxmox VE. Our newly released documentation walks you through a fully automated deployment script designed to save you time and reduce configuration errors. From Manual Clicks to Automated Provisioning Deploying virtual machi [...]
Knowledge source optimization for large datasets. Your 3CX AI Agent is a powerful tool, transforming customer interactions and streamlining support. But what happens when your agent starts to slow down, or struggles to find information in a vast pool of knowledge? Today, we're diving deep into best practices for structuring your 3CX AI Agent's knowledge sources, also commonly r [...]
Forward your 3CX operational, security and audit events directly to any Syslog server. For large enterprises, regulated industries and any organization running a Security Operations Center (SOC), having phone system events siloed on the PBX itself is no longer enough: Compliance frameworks demand centralized logging Auditors demand traceability SOC teams demand real-time visibi [...]
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