[Asterisk-Users] hidecallerid on analog line

[Chris Travers]

chawki hammoud wrote:

>In the ISDN case, setcallerid or hidecallerid can be
>configured and I am aware that  Asterisk doesn't
>support that on analog line. My question is whethere 
>there is something like add-on script or hardware that
>will do the job. The teleco company provide the
>callerid service, but no private number service.
>  
>
If I understand the signalling architecture correctly, if your telco 
does not provide the service, you are out of luck.

A quick explenation:  ISDN (PRI for the purpose of this example) uses 
out of band signalling to provide what is essentially a trunk line plus 
a signalling channel to your PBX.  Basically one of the DS0 channels on 
the T1 is used for signalling and called the D channel (while your voice 
DS0's are called B channels).

Analog lines are completely different.  In general, very little if any 
signalling is expected to be carried over an analog line.  Therefore, 
the advanced signalling capabilities that ISDN offer are unavailable on 
analog simply because the telco architecture doesn't support it.  
Basically, in this case, *all* caller-id data originates from the 
telco's switch.  The only way to suppress this information is to tell 
the switch to suppress it.  Unless they offer such a service (prefixing 
the number with something, for example, to activate it), you have no 
access to the system.  In this case there is nothing you can add to make 
this work.

Best Wishes,
Chris Travers
Metatron Technology Consulting

>--- Robert Webb <asterisk at ropeguru.com> wrote:
>
>  
>
>>On Wed, 29 Jun 2005 13:56:00 -0700 (PDT)
>>  chawki hammoud <cyhammoud at yahoo.com> wrote:
>>    
>>
>>>Is there a way to hide the callerid on analog line
>>>      
>>>
>>on
>>    
>>
>>>outgoing calls. Any ideas whether it could be done
>>>through configuration, a script or hardware.
>>>
>>>Thanks;
>>>
>>>      
>>>
>>It would have to be done through who ever provides
>>your 
>>POTS service. They provide the caller ID to who you
>>are 
>>calling. Some have the option to block it. Asterisk
>>cannot 
>>be configured to do this.
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