Flexisip
Complete, modular and scalable SIP server, includes a push gateway
Complete, modular and scalable SIP server, includes a push gateway, to deliver SIP incoming calls or text messages on mobile device platforms where push notifications are required to receive information when the app is not active in the foreground.
Strengths
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Written in C++
- Lightweight — runs in 512 MB RAM
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