AddOutgoingCallerId

HTTP Method Used: POST

Adds a new caller id to your account View Twilio Docs

format  
PhoneNumber The phone number to verify. Should be formatted with a '+' and country code e.g., +16175551212 (E.164 format). Twilio will also accept unformatted US numbers e.g., (415) 555-1212, 415-555-1212.
FriendlyName A human readable description for the new caller ID with maximum length 64 characters. Defaults to a nicely formatted version of the number.
CallDelay The number of seconds, between 0 and 60, to delay before initiating the validation call. Defaults to 0.