CLIP is NOT displayed on analogue lines CO
If you use analogue CO lines for interconnection with PBX or PSTN and no CLIP is displayed on extension of Netstar, then check the following settings:
1) Method of CLIP transfer: FSK or DTMF
2) Timeout of CLI reception - by default the value is 3000 ms, increase on 5000 ms.
All the settings are depicted below.