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openSIPS is a robust and versatile tool that functions as a Session Initiation Protocol (SIP) server. As an open-source software, it offers the flexibility needed for SIP communication services. It is designed with the main purpose of enabling voice, video, instant messaging and presence services among others while ensuring reliable performance.

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Key features of openSIPS include its capability to manage thousands of call setups per second. This makes it perfect for large-scale communication services that demand high capacity. It also boasts its enhanced security measures to protect your communication data from unauthorized access.

Furthermore, openSIPS supports a broad range of SIP extensions. Meaning, it can be tailored to specific communication needs whether for business or personal use. Its powerful routing mechanism ensures high-quality voice and video calls. Lastly, the software's robustness and versatility are unmatched due to its scalability, availability and extensive compatibility with various platforms.

With 1107 GitHub stars and the latest commit on 2023-07-31 the project looks healthy.