[asterisk-users] Automatic Number Identification and anonymous calls

[Kevin P. Fleming]

On 02/08/2012 10:06 AM, Carlos Alvarez wrote:
>
> On Wed, Feb 8, 2012 at 2:35 AM, Olivier <oza_4h07 at yahoo.fr
> <mailto:oza_4h07 at yahoo.fr>> wrote:
>
>     I always thought that ANI (Automatic Number Identification) could not
>     directly be set or changed by end users.
>     In this experiment, it seems that if an end user calls anonymously,
>     the ANI is also hidden to the receiving party.
>
>
> I never work with analog lines, but I do believe that anything less than
> a PRI would have the blocking done at the telco end before you get it.

Mostly correct; ANI is only delivered over ISDN, SS7 and *some* E&M 
trunk circuits. Analog circuits have no ability to transport ANI.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
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