T8
Webhooks and IVR
Events inbound, and the verbs that gather. 3 lessons. Each lesson cites the pages that were opened, and marks the rest confirm.
Webhooks come inbound
T8-R22
Twilio's webhook introduction says Twilio uses webhooks to notify your web app when events such as incoming calls or SMS messages occur.
TwiML verbs and what an IVR is
T8-R23
Wikipedia says an IVR interacts with callers, gathers information, and routes calls, using speech recognition and DTMF from the keypad.
A ladder you are allowed to draw
T8-R24
SIP sets up the session. RTP carries the media. The webhook tells your app that something happened.
Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- RFC. RFC 3261, SIP last checked 2026-10
- Wikipedia. Session Initiation Protocol last checked 2026-10
- Wikipedia. Platform as a service, Communications platform as a service section last checked 2026-10
- Confirm. Release-specific menus for this track. confirm. Not opened as a single checklist. last checked 2026-10