The UK spec adds a few fields which I can not remember all off the top of my head. One addition is the 'presentation' calling line identifier, which is screened

The UK spec adds a few fields which I can not remember all off the top of my head. One addition is the 'presentation' calling line identifier, which is screened like the 'calling party number'. The generic calling line identifier is not screened, hence the addition ref what the screening bits are: https://www.dialogic.com/webhelp/csp1010/8.4.1_ipn3/exsapi_quickref_icb_chap_-_screening_indicator.htm https://www.dialogic.com/webhelp/csp1010/8.4.1_ipn3/exsapi_q... As for if the UK & spoofing, it's a very real thing with very real business cases and abuses.