This is a small TwiML application to route phone calls to the right person.
We deployed this to Heroku, and then pointed it at the iCal feed for our developer on call rota. In the calendar set the location field on an event to a phone number, and any calls or text messages to the number pointed at this will be forwarded. You can also set multiple numbers if you have more than one team.
heroku create our-on-call
heroku config:set FEED_MAP='{ "+4412345677": "https://example.org/our/rota.ical" }'
git push heroku master
You'll then need to point a Twilio number at the application:
Voice: https://our-on-call.herokuapp.com/voice Message: https://our-on-call.herokuapp.com/sms
And you're done!