Nick
We are using QuadBRI cards from www.junghanns.net and also at home I
have a couple of cheap HFC cards - in by Asterisk box sandwiched between
my BT line and my Alchemy Cybergear Gold.
Using this there is the possiblility to differentiate between Withheld
and 'unavailable'. The latest
Speaking without experience of the exact combination you mention, but I'd
expect that BT will send these to you using the combinations as follows:
CLI: present Screening: available - Released number
CLI: absent Screening: withheld - Withheld number
CLI: absent Screening: available - Unavailable
