Re: question about burglar alarm dispute (San Francisco Bay Area)

["Mark Leuck" <m..leuck@xxxxxxxxx>]

"Nomen Nescio" <nobody@xxxxxxxxx> wrote in message
news:b105985fbe149fc311124e2ba9daeb0b@xxxxxxxxxxxx
> >[Central stations] have developed a way to
> >identify an account that has caller ID blocked so they can be certain to
> >bill you.
>
> When a central station uses toll-free 800/888/877 numbers for its receiver
> lines, caller ID blocking doesn't matter.  The central station gets the
> calling number regardless.  Technically, it's called ANI (automatic number
> identification) rather than Caller ID.  It's been that way since 800
> numbers were first introduced, the justification being that since the
> called party was paying for the call, they had a right to know who was
> calling, for billing purposes.

Actually there are devices to block even that, also certain VOIP services
can send any ANI they want