Archived from groups: alt.cellular.verizon (
More info?)
In article <bnltc.22597$9H6.11443@newssvr31.news.prodigy.com>,
dr.wireMORE <dr.wireMORE@VZW-MidWESTma.com> wrote:
>You raise an interesting point. One of the reasons you can't tele-market to
>a cell phone is because the cell-phone user is paying for the call.
>Wouldn't the same reason apply then to inbound calls and caller-id? Since
>you are paying for the call, (use of the airways, cell phone, towers, etc)
>shouldn't you see the caller-id of the person calling you?
>
>You are correct, as I understand it, if you call an 800 number, even if you
>attempt to block the caller-id, it will be displayed. Having the number
>display is part of the service in an 800 number.
Calls to 800 numbers deliver the ANI (Automatic Number Identification)
of the caller, not the caller-id. The ANI is the billing number, which
is usually the same as the caller-id for residential users, but may
well be different for businesses; e.g., CID would show the extension of
the caller, but ANI would show the main billing number of the company.
The ANI is what the phone companies use for billing, so, unlike CID, is
not readily spoofed. 800 numbers are treated equivalently to "collect"
calls, with the "we will accept the charges" preauthorized.
While the argument that "I am paying for incoming wireless calls, so
I should see who is paying for it" makes sense at first, consider that
delivering blocked CID to cell phones would completely negate the value
of blocking. Anyone could just forward their landline to a cellphone to
bypass the CID block, since CID reflects the original caller, not the
forwarding phone. (On a forwarded call, the ANI reflects the forwarding
phone, so if you forwarded your phone to a toll-free number, they would
get your number, not the original caller's number.)
When one calls a toll-free number, one knows ahead of time that the
calling number is available to the called party. When calling any other
number, one expects the CID blocking to be honored.
Delivering blocked CID to the end user is a major regulatory no-no
(whether it is always enforced is another matter).
Also, CID blocking and unlisted are two unrelated things, and doing
one not effect the other. If you have an unlisted number and don't want
people to get your CID, you have to explicitly arrange for your CID to
be blocked.