When calling 1-800 land line from Asterisk, is it allowed for me to use SIP INFO to send DTMF over to the 1-800 in order to navigate through IVR?
- Configure SIP extension to use dtmfmode=info
- Make a call to 1-800-Citibank for example
- 1-800-Citibank prompts me to enter the credit card number
- I construct SIP INFO message and send to Asterisk
- Asterisk in trurn sends the real DTMF tone to the 1-800-Citibank.
Is this right to use SIP INFO in this case?