Active telephony provider.
Optional ttsTTS settings for phone audio.
Optional sttSTT settings for phone audio.
Optional inboundInbound call policy.
Optional allowedAllowlist of E.164 numbers (for 'allowlist' policy).
Optional defaultDefault call mode for outbound calls.
Optional maxMaximum call duration in seconds (default: 300 = 5 min).
Optional webhookWebhook base URL for receiving provider callbacks.
Optional streamingMedia stream configuration.
Whether to use bidirectional media streams.
Optional wsWebSocket path for media streams (default: /voice/media-stream).
Full voice call system configuration.