Asterisk SIT Detection for Dial and Originate

Hi all,

Could anyone help me, I need to detect Special Information Tone in dial application and originate action. I have use DIALSTATUS and hangup codes too but there are not accurate. There is no documentation of detecting SIT. All the have mention is the change log of version 0.3.0 that
----> Enable tone detection with PRI & —>Add special information tone detection.
ALSO there documention of using zapteller to block telemarketing call.
But no details of SIT Detection.

Thanks & Regards

Sambeet Jena