Signal and Telegram both use the open-source solution WebRTC for voice and video calls.
Discussion
I don't know anything about that, except that Nostr doesn't use WebRTC.
0xChat uses WebRTC for audio/video calls. One difference from Signal/Telegram solution is that we use NIP-100 for signaling and also support custom ICE servers.
There is a NIP-100?
Yes, it hasn’t been merged yet
I see. You know, nostr:nprofile1qqsy2ga7trfetvd3j65m3jptqw9k39wtq2mg85xz2w542p5dhg06e5qpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszxrhwden5te0dehhxarj9enx6apwwa5h5tnzd9az7qgwwaehxw309ahx7uewd3hkctczcs834 says that there is no network effect with direct messages, but the whole reason I use Signal is because they managed to get half of my family onto their network. Is Keychat or 0xChat intrgrated with Signal's network? Can I can call my family with Nostr?