What protocol does Cisco IP phone use to send DTMF? As far as I know they can send it using in-band. I need to make them to use rfc2833. It has to be option that can be configured on phone (not on CCM) because I use them with Asterisk. I shuld configure it on 7905, 7920, 7940, 7960 and 7970. -- Tomislav Parcina tparcina at lama.hr