huntgroups & Calling-Station-ID

We have a problem with filtering users from a telco exchange that isn't sending us CallerID's. We have on-line account opening, and all new accounts have 5 hours access. Users with full CallerID's are easily stopped from abusing the system and using extra accounts. If the exchange isn't sending full Calling-Station-ID, but only 4 or 5 numbers we can filter the users by using hungroups: goodone Calling-Station-ID = 12345, User-Name = gooduser SQL-Group = dial (this will let that user connect) banthem Calling-Station-ID = 12345 SQL-Group = reject (this will stop all others) What can we do when NAS doesn't have any Calling-Station-ID to send? Ivan