🚀 go-pugleaf

In article <betel.727244356@camelot> betel@camelot.bradley.edu (Robert Crawford) writes:

>	A more interesting (to me) question: How could someone _with_
>caller ID screen calls that do not include the information? My idea is
>for the "black box" to sit between an answering machine and the
>telephone, and to not pass the ring signal unless the caller ID
>information comes along...

Great - if you don't want to receive any long-distance calls.  Calls
from other exchanges, especially in distant places, may not contain the
CID info because the necessary SS-7 protocal has not be implemented
everywhere yet.

Now if you can distinguish between "blocked" and "not available", that
would work fine.  This is probably dependant upon your hardware, but
may also be dependant upon how your local telco has things set up -
they may send one message for both conditions (although hopefully not!)