[Asterisk-Users] SIP standard for flash

[Kevin P. Fleming]

Jorge Mendoza wrote:
> Are there a SIP standard to transmit flash? For instance I would like to
> send a SIP message indicating to a FXO gateway to apply a flash for
> transfer.
> In RFC 2833 page 11, in DTMF Events, the table show that DTMF 16
> (decimal) is used for flash.  Can I use this?

Yes. This is what Asterisk sends when requesting a flash-hook event over 
  RTP.