IANA Data
Name: iax
Description: Inter-Asterisk eXchange
Note: Defined TXT keys:
auth plaintext | md5 | rsakeys
userid alphanumeric, additionally '', '+', '-'
secret any printable ASCII characters
domain any DNS domain name or IP address
extension alphanumeric, additionally '', '#', '', '+', '-'
context alphanumeric, additionally '', '+', '-'
trunk yes | no | 0 | 1
welcome alphanumeric, additionally '', '#', '', '+', '-'
voicemail alphanumeric, additionally '', '#', '_', '+', '-'
reception alphanumeric, additionally '', '#', '', '+', '-'
echotest alphanumeric, additionally '', '#', '_', '+', '-'
ivrtest alphanumeric, additionally '', '#', '', '+', '-'
All of these TXT record keys are optional, they may be omitted.
Further keys may be added in the future.