Use SIP INFO for DTMF

Asterisk Asterisk Support
1

Hi,

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?

For example

  • 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?

Thanks