Outbound call
The target opens in the softphone with an 8 trunk prefix (Meta SIP trunk) and dials automatically once SIP registration completes. Graph /calls is rejected with 131055 while the number is SIP-enabled.
Call events
| Time | Direction | Name | Number | Event | Call id |
|---|
Webhook
POST/GET /api/public/whatsapp/webhook
GET answers Meta's hub.challenge using the verify token; POST checks the x-hub-signature-256 HMAC before storing call events.