Thanks Leonid,
actually I already have the dx_setevtmask code, since it was in the SIP test program I downloaded somewhere here on the forum. Not receiving TDX_CST though.
Also I tried activating the telephony event by adding this parameter to my parm block after line device was reset (see the rest of the parameters in my code above):
gc_util_insert_parm_val(&parmblkp, IPSET_DTMF, IPPARM_TELEPHONY_EVENT_DTMF, sizeof(int), IP_ENABLE);
No luck tough, still only getting the one CALLINFO event.
Firing up Wireshark next... :)
