Asterisk 24 LTS Released: What is New in the Telephony Platform

In early October 2026, the official release of Asterisk 24.0.0 took place, marking a major update for the open-source computer telephony platform. The software is widely utilized for setting up software PBXs, voice communication systems, VoIP gateways, interactive voice response (IVR) menus, voicemail systems, and enterprise call centers under the GPLv2 license.

• Asterisk 24.0.0 was released in early October 2026.
• The platform is designated as an LTS (Long-Term Support) branch supported until October 2029.
• A total of 22 contributors participated in developing enhancements and bug fixes.
• Source code is publicly available on GitHub under the GPLv2 license.

Long-Term Support Details and Timeline Unlike standard short-term releases, Asterisk 24 is designated as a long-term support (LTS) branch, ensuring stability for enterprise environments. Updates, patches, and security fixes for this branch will be continuously rolled out until October 2029. For context, the support lifecycle for the preceding Asterisk 20 LTS branch runs until October 2027, while the Asterisk 22 branch is also supported until October 2029. Meanwhile, support for the older 18.x branch officially ended on October 20, 2025.

Key Technical Improvements and Updates Development of the stable Asterisk 24 branch involved contributions from 22 developers who introduced enhancements, optimizations, and resolved multiple user-reported bugs. These adjustments target overall performance and protocol reliability. Notably, the res_pjsip module for SIP-based VoIP communications now treats DNS-bound PJSIP contacts as available if at least one corresponding SRV, A, or AAAA DNS record resolves successfully. Additionally, the res_prometheus module received controls for exporting detailed channel and bridge metrics.

Network Capabilities and WebSocket Enhancements Network protocols and real-time streaming tools received substantial refinements. The chan_websocket module now features an unbuffered mode that transmits frames immediately upon receipt from applications or WebSockets. Furthermore, a write_timeout parameter was introduced to control write operation timeouts before error returns. Other additions include configuration examples for IP-based ITSP authentication and using TLS with SRTP, along with an Alembic script for generating res_geolocation tables automatically.

Impact on Enterprise Telephony and Business The arrival of Asterisk 24 LTS provides businesses, telecom operators, and system integrators with a robust, highly secure foundation for managing corporate voice networks and call centers. Guaranteed long-term support through late 2029 ensures operational continuity and reliable maintenance for mission-critical telephony setups.