To make up for the problem of being unable to make calls, it is recommended to set a long-lasting ringing reminder function

[WofWca]

FTR most of the discussions about calls happened in Help testing upcoming Delta Chat release with calls 📞!.

@DELTA_MAFIA

And will it work through signaling servers? Like in Telegram and WhatsApp?

Help testing upcoming Delta Chat release with calls !

Yes. Signaling is done with email messages, like message reactions.

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@DELTA_MAFIA

And will signaling servers like STUN/TURN be part of the chat mail relay deployment?

Yes.

@Vic9119

I would like to ask a question, is this call feature encrypted? Is it end-to-end?

Yes. Encryption is provided by WebRTC out of the box. DTLS keys are generated for each new call and are exchanged as regular Delta Chat messages, i.e. also encrypted (so no MITM).

@Vic9119

Will there be a server forwarding mode in the future?

See the separate topic P2P and proxy settings.

@Vic9119

The second question is, how can I check the encryption key for my account?

Encryption key for regular Delta Chat messages or for calls? For calls currently you can open dev tools in the call window and take a look at the log line that is below DTLS Fingerprint: SHA-256.

@Vic9119

Can this encryption key be changed regularly? If I create another account, will there be a new key?

As I said, the key for calls is re-made on every new call.