[Linphone-users] problem with send rfc2833 dtmf

[francesco francesco]

Hi,
i'm using ortp stack  and it works fine when data is audio PCM.
When i try to  send dtmf rfc2833 with function rtp_session_send_dtmf(..) the stack is blocked and no more rtp packet are sent.
rtp_session_send_dtmf (..) is blocking???

this is snip of code

...............................
...............................
rtp_session_set_scheduling_mode(session, 1); //  BLOCKING MODE
rtp_session_set_blocking_mode(session, 1);
rtp_session_enable_adaptive_jitter_compensation(session, TRUE);

...............................
...............................

nRet = rtp_session_send_dtmf(rsession, (char)nDTMF, user_ts_snd);
user_ts_snd += 480;


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If no send dtmf rfc 2833 nothing is  blocked and audio flow is regularly sent?

Can anyone help me?
anyone have the same problem ?
thank's in advance for your help.
best regards.