[asterisk-users] Automatic Number Identification and anonymous calls

[Kevin P. Fleming]

On 02/08/2012 12:40 PM, Olivier wrote:
> 2012/2/8, Kevin P. Fleming<kpfleming at digium.com>:
>> 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
>> Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
>> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
>> Check us out at www.digium.com&  www.asterisk.org
>>
>> --
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>
> Thanks for telling ANI feature can't come along analog lines.
>
> I did another test towards an ISDN BRI line and got the same results :
> ANI and CID are either both displayed or both hidden at the same time.

You need to talk to your provider to see if your circuit is provisioned 
to send you ANI at all; if it's not sent by the provider, Asterisk just 
duplicates the CLID into the ANI channel variable. Most end-customer 
(retail) ISDN circuits are not configured to send ANI unless the 
customer asks for it.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org