Please can anybody help! I've asked already but havn't got a clear answer.
I tried the setting that sipgate recommends for Grandstream Handytone-486.
Everything( inbound CID to incoming VOIP number, all outgoing CID) works
fine but incoming CID to PSTN number don't show up! I tried different
cables, BT-to-RJ11 adapters,microfilters between ATA and phone, etc. etc.

DECT: BT Diverse 4010
ATA: VOIP GATEWAY 102 (clone or similar to Grandstream
Handytone-486/488)with the following settings
FXS Impedance: CTR21(270R+750||150nF)
Onhook Voltage: 48V
Caller ID Scheme: ETSI-FSK
DTMF Send Type: Via SIP INFO