Can't get caller ID on Zap channels (TDM04)

HI,

I have tried all the combinations of bell, v23 and dtmf for
cidsignalling and ring and polarity for cidstart in my zapata.conf but CALLERID string is empty on incoming calls from pstn. it works for SIP.

Can anybody help me please? Thanks

where are you, what do you have set in zapata.conf, and what does your telco say when you ask them how it’s delivered ?